BYD MINI ES Battery Base Installation Manual

3 1.1.1 Functions 4 1.2 Foreseeable Misuse 4 1.3 Standards and Authentication 5 1.4 About this Manual 5 1.5 Abbreviations 6 2. Safety Requirements 6 2.1 Installer 6 2.1.1 Qualiications 6 2.1.2 Responsibilities 7 2.2 Location 7 2.2.1 Room Requirements 7 2.2.2 Room sizes 8 2.2.3 Ceiling, Ground and Wall Requirements 8 2.2.4 Temperature and Humidity 8 2.2.5 Access Rights 8 2.2.6 Pollution Grade 9 2.2.7 Protection Type 9 2.3 Safety Signs on the Device 9 2.4 Electrical Protection 9 2.5 Basic Safety Information 10 2.5.1 Risk of Fatal Injury 10 2.5.2 Risk of General Injury 11 2.5.3 Further Safety Information 12 2.6 Safety in Transportation 13 3. Technical Description 14 3.1 Scope of Supply 14 3.2 Nameplate 14 3.3 System Overview 15 3.4 Overview of Functions 15 3.5 Product Information 16 3.5.1 Appearance 16 3.5.2 Size introduction 17 3.5.3 Interface introduction 17 3.6 Button Functions 18 3.6.1 Power on Function 19 3.6.2 Power off Function 19 3.6.3 “Local” Control Function 19 3.6.4 Maintenance Charge Function 19 4. Installation 21 4.1 The Installation Process 21 4.1.1 Safety Introduction 22 4.2 Conirm Installation Location 22 4.3 Check the Packing 23 4.4 Devanning 23 4.4.1 The Steps of Devanning 23 4.5 Fitting the Mini ES 27 4.5.1 Installing the Fixed Bolts 27 4.5.2 Fix the system 28 4.6 Wiring 32 4.6.1 Wiring Diagram 32 4.6.2 Wiring Criteria 32 4.6.3 Cable Requirements 33 4.6.4 General and Important Load Distribution Plate Wiring 34 4.6.5 Install Transformer 35 4.6.6 Further Wiring 36 4.6.6.1 Shell Connection Interface 36 4.6.6.2 Internal Wiring 37 4.6.7 Connecting Ethernet Cable to the Clients Router 39 4.6.8 Connecting the Breaker 40 4.7 Commissioning and APP 40 4.7.1 APP download 41 4.7.1.1 Use for Android and IOS 41 4.7.1.2 Post Download 41 4.7.2 APP User Registration 41 4.7.3 Commissioning 42 4.7.3.1 Commissioning Process 42 4.7.3.2 Pre Commissioning Checks 43 4.7.3.3 Check Cable Resistance 43 4.7.3.4 Check CT 44 4.7.3.5 Check Mini ES Wiring 44 4.7.3.6 Check the Ethernet Wiring 44 4.7.4 Supply, Power and Start-up 45 4.7.4.1 Status Check 45 4.7.5 Check APP Functions 46 4.7.6 Start-up and Tidy 46 5. Installation Schedule 47 5.1 Installation Tool List 47 5.2 Speciication 48 5.3 After sales 49

hope our product meets your expectations. We would be grateful for any feedback you can give us regarding the performance and functionality of our product or service, so that we can continually improve our products and satisfy your needs. 1.1 Brief description This system has been developed as an electricity storage product to work alongside and compliment a Solar PV installation. It will minimize export of surplus power to the grid, and lower a properties import from the grid. The batteries prime purpose is to store excess solar generation up to the total installed capacity of the energy storage system. Note: It is an installer’s responsibility to size a battery storage system correctly against the properties installed Solar PV capacity and expected energy usage igures! Basic Mini ES layout diagram:

• Storing excess electricity generated by a Solar PV system. If the generation is lower than the load on the property, power can be drawn out of the Mini ES to supplement the Solar PV supply to the property. • In the event of a loss of grid power to a property the Mini ES can provide up to 2kW of power to an emergency load circuit connected to the Mini ES. This can be used to power home appliances. • A smart phone and/or desktop app can be used to monitor the systems performance real time from anywhere in the world, subject to connectivity. Below is an example of solar generation vs a properties electricity usage showing waste of generated solar power through export to the grid: 1.2 Foreseeable misuse The Mini ES should only be used for the purpose intended. Any installations carried out with deviations from this guide may affect the product warranties and/or performance. The equipment must be sited, and installed, as per the parameters speciied in this installation guide.

The Mini ES is compliant with all the standards listed in the table below. 1.4 About this manual This manual is applicable to the Mini ES and deines parameters for the installation of the product. The manual is applicable throughout storage, transportation, siting, assembly, installation, and commissioning of the Mini ES. This manual is intended for use by the installer of the Mini ES and not the home consumer. It contains important information for the installation of the Mini ES. Please read the manual carefully before the transportation, installation, operation, or maintenance of the Mini ES. Failure to do so may result in damage to the product, injury to the operator, or damage to a consumer’s property. This manual should be accessible to the installer at all times. Please take note and understand the following safety alarm signs before reading the manual: DANGER! Denotes an extraordinarily hazardous situation This warning symbol indicates an immediate danger, which can lead to severe injury and death. WARNING! Denotes a very dangerous situation This warning symbol indicates a potentially dangerous situation, which could lead to severe injury or death. Authentication item Standard Saftey EN62477-1 : 2012/A11:2014 IEC 62477-1(ed.1) EN 62040-1:2008/A1:2013 IEC 62040-1(ed.1); am 1 EMC EN61000-6-3:2007+a1:2011 EN61000-6-2:2005 On-grid VDE-AR-N4105:2011 DIN VDE 0126-1-1:2013 DIN V VDE V 0124-100:2012

This warning symbol indicates a potentially dangerous situation, which could lead to minor injury. Notice! Denotes a risk of material damage This warning symbol indicates a situation that could lead to material damage. 1.5 Abbreviations Abbreviation Content PV Photovoltaic System CT Current Transformer APP Application DOD Depth of Discharge SOC State of Capacity ESS Energy Storage System 2. SAFETY REQUIREMENTS 2.1) Installer 2.1.1) Qualiications • Mini ES installation must be carried out by a qualiied electrician who has the necessary knowledge, and who has been trained in all aspects of installing and operating the Mini ES. • All certiied installers must have necessary trade qualiications to make the connection of the Mini ES to a properties electrical supply. • The operator must be able to protect and maintain the device according to safety standards.

The speciied safety equipment for the system is fully functional. Any illegible warning and safety signs on the device should be replaced as soon as possible. • There are no lammable objects near the device. • The device should not be covered. • The device must be placed on a platform that is strong enough to support it. • Transportation, assembly, installation and commissioning of the device must be carried out by a suitably qualiied technician. • Transportation, assembly, installation and commissioning of the device must be carried out under the speciied conditions. • Technicians are responsible for carrying out suitable risk assessments and working within all UK Health & Safety requirements. • Only authorised and trained electricians can carry out the installation, commissioning and change settings and connections of the device. • The software, shell and components of the device can not be changed without t h e approval of the manufacturer; otherwise the warranty will be invalid. • If the seal is broken by unauthorised action, the warranty will be invalid. • The installation and operation of the Mini ES must follow the steps outlined in the installation manual. If these steps are not followed the warranty will be invalid. The electrician must ensure that: before commissioning and connecting the breaker, the electrician should understand all the basic information, especially the safety aspects of installing the unit: • No changing of the size and the rating of the fuse. • Before carrying out any electrical operations, the device must be effectively measured and conirm that the device is neutral. • Before installation, read the operation manual and when using any further equipment, make sure it conforms to the applicable UK standards. • Don’t dismantle the device when it is operating. 2.2 Location The desired location for the install needs to be decided before the storage system is delivered. You must ensure that the installation location that you choose meets the following conditions: 2.2.1 Room requirements • Dry and closed. • Clear from lammable objects and explosives.

• There is a small amount of noise emitted from the Mini ES. Although there is only a small amount of noise emitted, 40 decibels, place in a location that will not disturb the homeowner. • The location temperature must never fall below 0 degrees centigrade, or exceed 40 degrees centigrade. 2.2.2 Room sizes • The room has to be larger than 8.00 m³ • If the room size is 8-25m³, it needs ventilation which is at 12 m³/h of air change rate. • If the room size is over 25m³, it doesn’t need separate ventilation equipment. • The minimum base surface area is 2.00 m² - Min. height is 2.00 m - Min. depth is 2.00 m 2.2.3 Ceiling, ground and wall requirements • The ceiling should not be made with any lammable material. • The total weight of the device that the ground could support is 96kg (3kWh system). The proximity to the grid consumption meter shouldn’t be too far to install to allow CT cable connection without extending the CT (10m). • The rear and sides of the Mini ES should be 15cm from any ixed surface. 2.2.4 Temperature and humidity • Room temperature should be 0฀ (32฀฀to + 40 ฀. • Max. humidity is 95%. 2.2.5 Access rights • Children must be accompanied with an adult if they are in the installation room. • Children must not operate the storage system.

The surrounding environment of the energy storage system area is at pollution grade 2. Pollution grade 2 is deined as follows: Usually, only non-conductive pollution is produced; occasionally, however, temporary conductivity can be expected where condensation is present. 2.2.7 Protection type IP32 2.3) Safety Signs on the Device Graph Description Danger of electric shock Read the installation introduction and operation manual Please do not discard Ground connection The sign of fever 2.4 Electrical Protection An electrician must install the following safety equipment: • Residual Current Device (detailed speciication is in installation section of this guide). Graph Description

• There must be an RCD on the emergency load distribution plate from the Mini ES. 2.5 Basic Safety Information This chapter contains the basic safety instructions. Failure to observe the safety instructions in this manual may result in accidents which can lead to serious injury and/or death as well as serious material/property damage. 2.5.1 Risk of fatal Injury DANGER! Risk of fatal injury due to lack of assistance A second body can switch off the power supply and provide assistance in the event of an accident. - Only if a second person is present, could there be assistance in any case scenario Risk of fatal injury due to disregarding safety Instructions If the safety instructions and/or the sequence of Steps for installation are not followed, the product may be damaged permanently and electrical accidents with serious personal injury may occur. - Consult the safety instructions. - Note the sequence of steps for installation. Risk of fatal injury due to residual voltage in inverter The capacitors of the inverter built in to the Mini ES may still have residual voltage even after the device has been switched off. - Shut down all external and internal switches and ensure they will not be switched back on. - After switching off the device, you must wait for 10 minutes at least before touching any components. Risk of fatal injury due to electric shock from battery Batteries have a high short-circuit current. When they are handled incorrectly, it can cause an electric shock and even lead to serious injury and/or death. - While working, remove watches, rings and other metal objects. - Use tools with insulated handles only. - Do not place or store tools, (or other metal objects) on the batteries. Risk of explosion due to the use of incorrect battery types If the battery which is used in the device is not approved, it may cause explosion. - Only use batteries that have been approved by the manufacturer.

WARNING! Risk of injury due to lack of expertise Installing and commissioning the storage system requires training, as well as established expertise in electrical engineering. - Only the authorised, trained electricians are to carry out the installation, operation, or maintenance of the Mini ES. Risk of burns due to high temperature The components temperature of the device may be up to 100 °C (212°F), which can cause serious burns. - After switching off the device, you must wait for 10 minutes before touching any components. - Do not touch hot components. Risk of injury due to heavy weight The heavy weight of the components may cause injury during installation, disassembly and transportation. -Transport and mount the components with two people. Risk of injury due to follow the correct sequence If the speciied sequence is not followed during installation, it may cause injury or material damage. - Consult the order of events. - Consult the safety instructions. Risk of injury due to misinterpretation of the instructions If the speciied sequence is not followed during installation, it may cause injury or material damage. - Consult the user manual. - Consult the safety instructions. Risk of injury due to sharp edges The components may have sharp edges which can cause hand injuries if not handled carefully. - Wear protective gloves. - Mount the components with two people. Risk of injury due to incorrect use of the batteries Eye and skin injuries caused by opening or damaging the batteries. - Never open or damage the batteries. Risk of ire due to incorrect use of the batteries - Do not short-circuit the batteries. - Do not reverse the polarity of the batteries. - Do not overcharge the batteries.

WARNING! • Don’t carry out electrical maintenance to the internal components of the equipment. If necessary, please contact the distributor. • Don’t climb on the equipment. • Don’t block the vents of the device. • Don’t put any objects inside the equipment. • Don’t disturb any cables within the device. • Don’t site the device near a heat source. • Don’t use wet cloths or solvents to clean the device. • Don’t site the device near other high frequency devices. • Don’t touch the power supply with a wet hand or cloth. • Don’t put the unit near a high frequency machine or wireless machine that can send waves, (radio/tv). • Don’t hit or drop the unit. • Don’t connect a device that can’t work without external power supply to the system. • Don’t touch the power supply after the completion of an installation when there has been a problem or the equipment has been damaged, because it may cause electric shock. • Don’t touch it when it thunders. • Don’t it it to medical equipment. • When the device appears like it has broken, or it breaks, sounds/smells wrong, please contact BYD. • Please contact BYD if the device isn’t working properly. • When installing make sure there’s enough space for maintenance and inspection. • If the system hasn’t been used for a long time, please contact BYD. • If the device moves around, please contact BYD. • Must be installed indoors. • The Mini ES has been speciically designed for the UK market.

WARNING! Risk of injury due to heavy weight The heavy weight of the components may cause injury during installation, disassembly and transportation. - 2 people should transport and mount the system. Material damage due to condensation If the device is moved from a cold environment to the installation location it may cause condensation, which causes damage to the components. - Transport the unit at T=0°C to +50 °C (32-122฀) and a maximum relative humidity of 95% (non-condensing). - Before commissioning, the unit must be dry. CAUTION! Material damage due to impact forces When moving and setting down the device, electronic equipment can be damaged by the forces of impact. - Avoid any impact

3.1 Scope of Supply After unloading the storage system, please check if a component has been lost or broken. In the event that it has, please contact the manufacturer. The delivered system should include the following components: Item Name Number Description 1 MINI ES 1 2 Current Transformer 2 With 10m cable 3 User Manual 1 4 Installation Checklist 1 5 Written Warranty 1 6 Test Report 1 7 Qualiication 1 8 Maintenance card 1 3.2 Nameplate There is a nameplate on the left side shell of the ESS. The nameplate contains important parameter information about the ESS. During the operation, transportation, installation, maintenance and in any case, the nameplate should be well protected. Under any circumstances you should not remove it. Please see the image below showing the nameplate:

BYD has gone through an extensive R&D process over a long period of time, to bring a highly effective solution to the UK market. The solution contains LiFePO4, PCS, and distributed BMS System. It extrudes the advantage of intelligence and the integration of the overall technology means that the user can detect the ESS by the APP (support IOS and Android). It is a credible, safe and effective method for energy saving and for the environment. The system is designed for electrical energy storage. It works with PV so that the redundant energy from the PV can be effectively distributed in order to help you save energy. CAUTION! - The important load can’t overload the rated power, 2 KVA in the Mini ES otherwise the Mini ES will lose the protection function and stop working. - When the battery is empty, it will mean the important load will lose its power. 3.4 Overview of Functions The energy storage system has a balance meter with 4 working statuses, speciic as follows: 1. When it is a sunny day with abundant daylight, the energy from the PV could support the emergency load and redundant energy could be charged to the Mini ES. 2. When there is no daylight and the battery is full of energy, the Mini ES will support the emergency load. 3. When there is no daylight, the battery may not be able to support the load solely and so the grid will work with the battery to support the load. 4. When there is no daylight and the battery is empty, the grid will support the family load. When the Mini ES is on-grid, it can’t run continuously at full power – 3Kw. In order to keep the service life of the batteries, it will decrease the power automatically dependant on the status of the batteries (too high or too low). The system could support a property with daily circulated charge and discharge. If there is cloudy weather over a prolonged period of time and the Mini ES is on-grid, the PV couldn’t support the energy to the product in order to ensure the machine could be kept on standby, it would therefore get energy from the grid to charge the batteries, (which would take about 0.3kWh-0.4kWh energy from the grid) When the grid loses power suddenly, the Mini ES will support the important emergency load automatically at 2KVA. This is an emergency function. When the load is over this power, the Mini ES is self protected and the electricity supply will stop. The Mini ES is designed for smaller power devices such as lights and computers.

The Mini ES is 680mm in length, 257mm in width, 610mm in height and 96kg in weight. 3.5.3 Interface Introduction

2 DC- For addition of 3kWh extension pack 3 12V POWER RESERVED 4 RS485 RESERVED 5 CAN1-1 RESERVED 6 CAN1-2 RESERVED 7 LAN Ethernet cable interface 8 CT1-CT3 Current transformer interface 9 GRID Grid interface 10 LOAD Emergency Load interface -11 PV INVERTER RESERVED WARNING! The interface mentioned above must be operated by a qualiied professional engineer. BYD will not take responsibility for the Mini ES if other products have caused it to break. 3.6 Button Functions

LOCAL: Local control button REMOTE: Remote control button 3.6.1 Power on function • Press the “POWER” button for about 10 seconds until the “POWER” light is on. When you are waiting for the “POWER” light, “POWER”, “LOCAL”, “REMOTE” light will licker one time. This is the normal process for powering up. • When the “POWER” light is on you can you release the “POWER” button. The “POWER” light will licker for about 1-2 minutes. This procedure is the Mini ES checking itself. Again, this is normal during the powering up process. After this process the “POWER” and “LOCAL” will stay alight and the powering up process is complete. DANGER! Risk of shock The load distribution plate always has an electric current when the energy storage system is working. - Only after a professional engineer installs the Mini ES can the user start the Mini ES. - Don’t operate the load distribution plate when the grid is off. Turn off the Mini ES and after testing the load distribution plate to make sure it is neutral, you may operate. 3.6.2 Power off function • Press the “POWER” button until the “POWER” light is off. When it is, you have turned the system off successfully. 3.6.3 “Local” control function • With the Mini ES you can use both the “LOCAL” and “REMOTE” button to set the “local control” and the “remote control” mode respectively, (although the system defaults the local control). The “REMOTE” button is designed for professional users. • After the Mini ES is on, the system defaults local control and the “LOCAL” light keeps on. If the customer wants to change the remote control mode to local control mode, press the “LOCAL” button for about 5 seconds. When the “LOCAL” light turns on, it means the Mini ES has changed to the local control mode successfully. 3.6.4 Maintenance charge function • If the Mini ES is unused for a long period of time, the user will need to charge the batteries to full, in order to ensure the service life of the batteries. • Press the “REMOTE” and “LOCAL” button at the same time for about 5 seconds. Both lights of “REMOTE”, “LOCAL” and “POWER” are on, the maintenance charge mode starts.

• When it is in maintenance charge mode, the system will charge the batteries to full capacity. After the Mini ES is powered off, take off the wiring between the Mini ES and the grid. • If the user wants to stop the function, press the “REMOTE” and “LOCAL” button for about 5 seconds and then the Mini ES will go back to the local mode. CAUTION! - Only the speciied buttons are valid. Other button operations are invalid. - Only after installing will the system start working.

START END 1. Conirm Installation location 3. Devanning 5. Wiring 2. Check the packing 4. Fix MiniES 6 Commissioning 7. Clean ield

Installing and commissioning the storage system requires training, and only qualiied installers can carry out the installation, wiring and commissioning. WARNING! Risk of injury from failing to follow the correct sequence If the speciied sequence is not followed during installation, it may cause injury or damage to the unit. - Consult the speciied order. - Consult the safety instructions. Risk of injury due to sharp edges The components have sharp edges which can cause injuries if not handled correctly. - Wear protective gloves. - Mount the components with 2 people. Risk of injury due to heavy weight The heavy weight of the components may cause injury during installation, disassembly and transportation. - Transport and mount the components with 2 people. DANGER! Risk of shock • The batteries have a high short-circuit current which causes a shock, that could lead to serious injury or death if touch it improperly. The exterior cable also has a risk of shock and accidental touching could also lead to serious injury or death. • Don’t wear watches, rings and other metal accessories when you are working. Only use the tool with non-conductive handle • Don’t set or store tools or anything metal on the batteries. • When you connect the exterior cables, please conirm that the power is off. Check the exterior cable. 4.2 Conirm installation location • Refer to this manual section 2.3 “Conirm installation location”, to select proper installation location • After conirming the location, please disconnect the power supply of the circuit and make sure the circuits of the room are neutral, then installation can begin.

- The circuit that holds the consumer unit must neutral and off-grid before the installation. 4.3 Check the packing • Before delivery, the Mini ES has gone through rigorous quality checks and has been carefully and irmly packed. It may however, still have been damaged or had some sort of impact during transportation. If there is any breakage on the surface of the product, it may indicate that the equipment or internal component has broken. • Please record and check the energy storage system carefully after unpacking the device. • If the product has been damaged seriously or lost, the customer should contact BYD. 4.4 Devanning The outer packing of the Mini ES is a w ooden case. 4.4.1 The steps of devanning 1) Dismantle the wooden case irst by pulling straight the buckles. ฀ is the location of the buckles in the diagram: > Related tools: long nose pliers (5 inches), screwdriver (D5*100)

3) Dismantle cover plate and remove the following items: • Installation checklist • User Manual • Quality guarantee Qualiication • Test report • CT Current Transformer

7) Check the items in the box as per point 3.1. Do not unpack the box in transit. The customer has the full right to refuse changing or receiving the product if the components are lost or damaged. 8) Make sure that the system model is consistent with what was ordered. 9) The length of the CT cable is only 10m; therefore, ideally the Mini ES should be installed nearby distribution plate. If not, you will need a longer CT cable.

4.5.1 Installing the Fixed bolts 1) Fixing the Mini ES is recommended. Should you wish to ix it, there are 4 holes on the bottom. 2) Punching 4 M8 bolts on ground for ixing. The hole for the bolts should be 40mm deep. > Related tools: electric drill, drill bit (10), hammer 3) Punch holes according to bolt distance: 4) Insert and knock bolts in the holes as per below diagram:

1) Lift the machine to the corresponding ixed bolts: 2) Remove the left and right side shell plate before ixing in the process outlined below: • The right side of the shell plate has 6 screws. • The direction of rotation is as shown in the below diagram that shows the side shell being removed. • The left 3 (near the connection interface side) need to be completely removed. • The 3 on the right side don’t need to be removed, just loosen them: > Related tool: cross screwdriver (D6*150))

4) Remove the other side plate: • The left side shell has 6 screws • The direction of rotation is as shown in the below diagram that shows the side shell being removed. • The right 3 (near the connection interface side) need to be completely removed. • The 3 on the left side don’t need to be removed, just loosen them: > Related tool: cross screwdriver (D6*150))

following picture shown: 6) There are holes at the bottom of the Mini ES for ixing bolts. The holes are covered by a protective plug: > Related tools: M14 sleeve to ix nuts (M8), the sleeve and rod sets (M13) • Open the protective plug and ix the nuts. • There are 4 nuts to be wrenched. • The ixing torque standard is 20N/m. • After ixing, install a protective plug.

4.6.2 Wiring Criteria Item Step Content 1 Meter wiring 2 General and important load distribution plate wiring 3 Installing current transformer 4 Mini ES wiring 5 Connecting the Ethernet cable to the router • When paving the cables, the cable needs to keep right in the corner. Try and make the communication cable the shortest length and keep the distance to the power cable. • The electric wire and cable must pass through a suitable containment. • In order to reduce the transient electromagnetic interference of the output voltage, the power cable and signal cable should be put in different containment. • Cables should be wired in a neat manner. • Make sure you consider reducing the stress of wiring the cables when ixing them.

Loose wiring may cause the system to be irregular and can lead to serious accident like shock. - The engineer should check the exterior distribution plate and make sure it is neutral before wiring. - Wire line must pass through trunking or PE plastic pipe. The area that the trunking and PE plastic pipe doesn’t cover should be ixed by ribbon. - Avoid heating the component and strong electric ield loop cable. - Avoid scratching and breaking insulation skin of cable. - All cables should be checked carefully after wiring. 4.6.3 Cable Requirements When choosing cable length and connection, please decide according to the actual wiring of the install: Item Name Description Manufacturers recommended type 1 Power cable Mini ES connects to general load distribution plate 3*4mm² 2 Load cable Mini ES connects to important load distribution plate 3*4mm² 3 Communication cable PV communication cable 10m 4 Internet communication cable Mini ES internet connection CAT5 UTP (Unshielded Twisted Pair)

Distribution plate wiring: please wire according to the following diagram: > Related tools: cross screwdriver, wire stripper, wire crimpers Requirement: • There must be a maximal limited current 32A, 30mA current leakage protection breaker between the room grid and energy storage system. • There must be a maximal limited current 16A, 30mA current leakage protection breaker between the important distribution plate and energy storage system. • You must check the wiring according to manual after installation. • The installation must be undertaken by a competant person in line with the requirements of BS7671 CAUTION! Electric leakage protection In order to prevent the electric leakage phenomenon caused by the system fault or damage, there must be an electric leakage breaker between the input cable and the output cable in the system.

Loose wiring will lead to system working incorrectly and may even lead to a serious accident like shock. -Check the exterior distribution plate before wiring; only make sure it is neutral. -Don’t break the insulation skin of the cable. - All the cables must be checked carefully to prevent bad contact. 4.6.5 Install Transformer Only after the Mini ES starts can you install the CT, otherwise, it will cause the APP to show the incorrect information. • The CT clamp from the inverter to the consumer unit should be clamped around the live feed from the inverter to the consumer unit. The arrow needs to be facing towards the consumer unit. • The CT clamp from the consumer unit to the grid needs to be clamped around the live meter tail. The arrow should face towards the consumer unit. Following commissioning and after setting up the monitor software, the clamps functionality can be tested quite simply. Open the BYD app, switch on a kettle powered by the property, and you should see an upward spike in the ‘Load’ line on the graph (see image right). If the spike is reversed and spiking downwards, the CT clamp between the battery and the grid is the wrong way round.

4.6.6.1 Shell connection interface introduction Please install as per the diagram and table below: > Related tools: wench Item Name Description 1 DC+ The reserved interface (forbid unless authorised by BYD) 2 DC- The reserved interface (forbid unless authorised by BYD) 3 12V POWER The reserved interface (forbid) 4 RS485 Meter correspondence interface 5 CAN1-1 Remote control interface, HMI interface 6 CAN1-2 The reserved interface (forbid) 7 LAN Ethernet cable interface 8 CT1-CT3 Current transformer interface 9 GRID Grid interface 10 LOAD Load interface -11 PV INVERTER The reserved interface (forbid) Notice! - Only the wrench could take off the electric connection interface coat. - Take off the coat before installation. - All wiring should penetrate the connection coat and then penetrate the connection hole. - Connect the wiring to the internal interface. - Complete the internal wiring and ix the connection coat.

Wiring is in accordance with section 4.6.6.1. > Related tools: screwdriver, diagonal cutting pliers, stripping pliers, wire crimpers, cable clamp Wiring Content: A. Grid cable connection There must be a maximal limited current 32A, 30mA current leakage breaker between room grid and energy storage system. B: Load cable connection There must be a maximal limited current 16A฀30mA current leakage breaker between important load distribution plate and energy storage system. C: The connection of meter communication cable D: The connection of current transformer signal cable E: The connection of Ethernet cable CAUTION! Electric leakage protection In order to prevent electric leakage phenomena after system fault or damage causes more serious accident, there must be a 30mA current leakage breaker in the input cable and output cable of the energy storage system. DANGER! Risk of shock Loose wiring can cause serious accidents. - Check the external distribution plate before wiring, only after it is neutral could wire. - Avoid scratching the isolation skin of cables. - All the wiring should be checked carefully after wiring to prevent bad contact.

The position needs to wire is marked by “*” Item Name Description 1 Battery power wiring Reserved (only product which is authorised by BYD could connect) Charger power wiring Reserved (only product which is authorised by BYD could connect) 2 12V source Reserved (forbid) 3 * RS485 Connecting to meter communication interface 4 RS485 Remote control interface, HMI interface (local debugging interface) 5 CAN Reserved (forbid) 6 * TCP/IP Connecting to customers interface 7 CT3 Reserved (forbid) 8 * CT2 Current transformer interface 9 CT1 Reserved (forbid) 10 GRID Connecting to the 30mA current leakage protection breaker which is in the general load distribution plate, the earth line to the shell of MiniES 11 LOAD Connecting to the 30mA current leakage protection breaker which is in the general load distribution plate, 12 SOLAR Reserved (forbid) 13 EARTH The grid cable has the earth line, connect the earth line to the shell of MiniES

The buckle is ixed on the connection board. The black arrow indicates the cable connection hole. Split the white buckle and then inset the cable to the connection hole. Clasp the buckle. Notice! Please ensure the wiring buckle is clasped irmly in order to prevent the bad contact, it requires you to check the connections carefully after the wiring of power cables have been done. 4.6.7 Connecting Ethernet cable to the Client’s Router You need to connect one side of the Ethernet cable to the user’s router and connect the other side to the system. The standard of router and RJ45 is EIA/TIA568B. The APP could search the data of energy storage system that was uploaded to the data service by energy storage system - Make sure the Ethernet interface has connected to router. - Make sure the Ethernet interface has connected to router that could connect to the Internet. - The data which is shown in the APP is not the real time data of MINI ES.

1) Pull up the two breaker levers as seen below: 4.7 Commissioning and APP Please inform the customer that the energy storage system can support the APP. As an installer of BYD please help the client download the APP, register an account and show them how to use it. Notice! The APP data has deviation Because of the complex working conditions of the system, the following reasons may cause an error between the operating data and actual data. - The APP data which is the average operating data in 1 min is not the real time operating data. - When the PV power is lower than 500W, it may inluence the precision of the PV side collecting data

4.7.1.1 Use for Androids & IOS User For Android users: Search “Google market”, the keyword is “BYD energy storage”, the icon of APP is For IOS users: Search “App store”, the keyword is “BYD energy storage”, the icon of APP is 4.7.1.2 Post Download The APP can search for the data for the energy storage system: • -Make sure the Ethernet interface has connected to router • Make sure the Ethernet interface has connected to router that could connect to the Internet • The data which is shown in the APP is not the real time data of MINI ES. 4.7.2 APP User Registration The APP must bind to the account. It needs registering primarily, after that you can import the user name and the password on the login screen and then you can login. Registration address: http://res.byd.cn/login.jsp Please ill out the ”production number” on the nameplate to”the product serial number”.

START END 1. Full check before commissioning 3. Observe Mini ES indicator 5. Record APP data 2. Power supply and start up 4. Maintenance charge 6 Commissioning complete

The energy system should be fully checked before commission. The engineer should record data carefully and ill the record into the checklist. If a igure doesn’t make the correct requirement, the issue will need to be rectiied. DANGER! Risk of short-circuit The wrong wiring may cause serious accident. - The engineer must check whether there is short-circuit before power-on. 4.7.3.3 Check cable resistance According to the introduction of the internal connection interface, measure resistance between the grid interface and load interface. > Related tool: multimeter The Checklist before commission Step Content Reference Result 1 Grid live wire to zero line  >100KΩ 2 Grid live wire to earth  >5MΩ 3 Grid live wire to load wire  >5MΩ 4 Grid live wire to load zero line  >5MΩ 5 Grid zero line to earth  >5MΩ 6 Load live wire to zero line  >5MΩ 7 Load live wire to earth  >5MΩ

Measure the resistance of interface by multimeter that is set in Ohm (please note that according to the Mini ES internal wiring, the measure of the resistance is CT1, CT2). > Related tool: multimeter • No current transformer resistance is 20.0±0.1Ω฀ • Connecting the current transformer resistance is18.5±0.5Ω Content Requirement Result Connecting PV inverter current transformer to the energy storage system correctly (CT) Resistance is 18.5±0.5Ω 4.7.3.6 Check Mini ES wiring According to the introduction of internal interface, ensure the wiring is consistent with the diagram in the wiring chapter. Please check the following: Item Content Requirement Result 1 Power cable The positions of the live wire ,zero line, earth are consistent with diagram 2 Load cable The positions of the live wire ,zero line, earth are consistent with diagram 4.7.3.7 Check the Ethernet wiring According to the introduction of the inner wiring, ensure the wiring are consistent with the picture, and make sure the Ethernet cable could communicate and the router of the customer could connected to the internet, the following is the content that needs to be checked: Item Content Requirement Result 1 Ethernet wiring The positions of wiring are consistent with the diagram 2 Can the Ethernet cable communicate? The APP operates normally and can read the data from the system 3 Can the customer’s router connect to the internet? The router of the customer can connect to the internet

Only connect the breaker of MINIES on the “general distribution plate” to supply power to system. The process: 1. Press the “POWER” for about 10s until “POWER” light is on. 2. While you are waiting for “POWER” light on, the “POWER”, “LOCAL”, “REMOTE” light will licker once; this is normal behavior during the start up process. 3. When the “POWER” light is on, you can release the “POWER” button. 4. The “POWER” light will licker for about 1-2minutes. This means that the Mini ES is checking itself, a normal operation during the power up process. 5. After this process, the “POWER” and “LOCAL” lights will stay on. 6. The process in complete. 4.7.4.1 Status Check To check the status of “POWER”, “LOCAL” lights: Normal status: “POWER” and “LOCAL” buttons stay alight (as shown below) Abnormal status: “POWER” lickers (the communication cable of the meter has not connected) “LOCAL” lickers (the system has not been connected to the grid or the grid doesn’t has power) Start check Step Content Requirement Result 1 Power status Stays Lit 2 Local status Stays Lit REMOTE LOCAL POWER

Only when the Mini ES has been working for at least 1 minute can the APP download the data from the system, because the service sends the data every minute to the APP. Record the result: Maintenance Charge Data Step Content Requirement Result 1 Does the APP main interface show the grid power data or not? APP has sampled grid power data 2 Does the APP main interface show the PV data or not? APP has sampled PV power data 4.7.6 Start-up and tidy Put the shell back on the system and connect all of the exterior grid breakers, follow the normal start-up steps, start up the system and inform the client that the installation has been completed. Tidy site.

5.1 Installation tool list Item Tool name Tool type Use 1 Art Knife Dismantling the packing 2 Screwdriver D6*150 Disassembling the machines shell 3 Screwdriver D5*100 Open the wooden case packing 4 Screwdriver 3mm CT connector 5 Sleeve and rod sets M13 Fixing anchor bolt 6 Electric drill and drill bit 10 drill bit Punching holes for anchor bolts 7 Hammer Punching the anchor bolts into the ixed holes 8 Long nose pilers 5 inches Disassembling the wooden case packing 9 Wire stripper 22awg 4awg Power cable 10 Wire crimpers 22awg 4awg Power cable 11 Cable clamp RJ45 Press the Ethernet cable 12 Mutimeter Standard Installation and commissioning 13 Adjustable wrench 14 Scissor 15 Tape measure Measuring the distance of the hole of the anchor bolts 16 Other auxillary tools (such as: insulated shoes, electric tapes etc.) All the installation process

On-grid parameter Rated voltage AC230V/1Phase Maximum current 13A Rated frequency (range) 50HZ(48.5HZ-51.5HZ) Maximum power 3KW Current harmonic <5% Off-grid parameter Rated voltage AC230V/1Phase Rated current 8A Maximum current 16A (protection in 5s) Rated power 2KVA Rated frequency 50HZ Rate of current harmonic distortion <3% Off-grid protection 1~1.1 times rated power over load: protection in 15min 1.1~1.5 times rated power over load: protection in 15min 1.5~2 times rated power over load: protection in 15min Battery parameter Rated voltage (range) 52V (DC44.8V-DC57.6V) Battery type LiFePO4 Basic battery capacity 3KWh Other parameter Size of product 680mm (W) x 256mm (D) x 610mm (H) Net weight 96kg Working humidity 5% ~ 95% IP type IP32 (indoor) Noise <2000m Way of cooling Air cooling Communication interface RS485*1/Ethernet (RJ45) *1/current transformer (CT) Working temperature 0ºC~40ºC(32~104ºF) Storage temperature 0ºC~40ºC(32~104ºF)

For any assistance with your BYD system please contact BYD-ES direct on the technical help and service line: +44 1484 475 800 Or email: [email protected] Ofices are open from 9-5, Monday to Friday. BYD-ES St Peggs Mill Thonrhillbeck Lane Brighouse West Yorkshire HD6 4AH