Fox Energy Cube HV ECM4100 4.03 kWh Slave battery #1: FE-HV-ECS-4100 Please note these are V2 batteries and only compatible with other V2 Cube batteries Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube 4.03 kWh Data Sheet Fox Cube 4.03 kWh Manual Fox Cube 4.03 kWh Warranty Fox Cube 4.03 kWh Attestation Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* Energy cube is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 28.21 kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.03kWh Capacity Scalable to 28.21kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage Weight: 38.3 kgBattery Type: Lithium IonNominal Energy: 4050 WhDepth of discharge: 90.00 %Voltage: 52 VContinuous Discharge Rate (Normal Use): 2875 WMaximum Discharge Rate (5 Minutes): 2875 WSurge Discharge Rate (15 Seconds): 2875 WMaximum Charge Rate (5 Minutes): 2875 W

Fox Energy Cube HV ECM4100, 12.09kWh 1x Master 2x Slave #1: FE-HV-EC-3-4.1-12.3 Please note these are V2 batteries and only compatible with other V2 Cube batteries Please view our battery storage information page for sizing and selecting the right battery storage system for you. ECM4100 Data Sheet ECM4100 User Manual ECM4100 Warranty Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* This part is made up of the following items:1 x FE-HV-ECM-4100 Fox Energy Cube 4.03kWh HV Battery (Master) 2 x FE-HV-ECS-4100 Fox Energy Cube 4.03kWh HV Battery (Slave) Fox Energy Cube 4.1kWh - Stack of 3 (12.09kWh) Incl. Master ECM4100 4.03kWh CapacityScalable to 28.21kWh 90% Depth of DischargeWide Temperature TolerenceEasy InstallationCAN/RS485 CommunicationHigh Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post installation.Weight: 74.3kgDimensions (Width, Hight, Depth): 570mm x 350mm x 380mmThis battery stack allows for a MAXIUMUM OF 7 modules in a series and must include 1 Master

Fox Energy Cube HV ECM4100, 16.12kWh 1x Master 3x Slave #1: FE-HV-EC-4-4.1-16.4 Please note these are V2 batteries and only compatible with other V2 Cube batteries ECM4100 Data Sheet ECM4100 User Manual ECM4100 Warranty Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* This part is made up of the following items:1 x FE-HV-ECM-4100 Fox Energy Cube 4.03kWh HV Battery (Master) 3 x FE-HV-ECS-4100 Fox Energy Cube 4.03kWh HV Battery (Slave) Fox Energy Cube 4.1kWh - Stack of 3 (16.12kWh) Incl. Master ECM4100 4.03kWh CapacityScalable to 28.21kWh 90% Depth of DischargeWide Temperature TolerenceEasy InstallationCAN/RS485 CommunicationHigh Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post installation.Weight: 74.3kgDimensions (Width, Hight, Depth): 570mm x 350mm x 380mmThis battery stack allows for a MAXIUMUM OF 7 modules in a series and must include 1 Master

Fox Energy Cube HV ECM4100, 20.15kWh 1x Master 3x Slave #1: FE-HV-EC-5-4.1-20.5 ECM4100 Data Sheet ECM4100 User Manual ECM4100 Warranty Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* This part is made up of the following items:1 x FE-HV-ECM-4100 Fox Energy Cube 4.03kWh HV Battery (Master) 4 x FE-HV-ECS-4100 Fox Energy Cube 4.03kWh HV Battery (Slave) Fox Energy Cube 4.1kWh - Stack of 3 (20.15kWh) Incl. Master ECM4100 4.03kWh CapacityScalable to 28.21kWh 90% Depth of DischargeWide Temperature TolerenceEasy InstallationCAN/RS485 CommunicationHigh Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post installation.Weight: 74.3kgDimensions (Width, Hight, Depth): 570mm x 350mm x 380mmThis battery stack allows for a MAXIUMUM OF 7 modules in a series and must include 1 Master

Fox Energy Cube HV ECM4100, 28.21kWh 1x Master 5x Slave #1:FE-HV-EC-6-4.1-24.6 ECM4100 Data Sheet ECM4100 User Manual ECM4100 Warranty Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* This part is made up of the following items:1 x FE-HV-ECM-4100 Fox Energy Cube 4.03kWh HV Battery (Master) 5 x FE-HV-ECS-4100 Fox Energy Cube 4.03kWh HV Battery (Slave) Fox Energy Cube 4.1kWh - Stack of 3 (24.18kWh) Incl. Master ECM4100 4.03kWh CapacityScalable to 28.21kWh 90% Depth of DischargeWide Temperature TolerenceEasy InstallationCAN/RS485 CommunicationHigh Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post installation.Weight: 74.3kgDimensions (Width, Hight, Depth): 570mm x 350mm x 380mmThis battery stack allows for a MAXIUMUM OF 7 modules in a series and must include 1 Master

Fox Energy Cube HV ECM4100, 28.21kWh 1x Master 5x Slave #1:FE-HV-EC-7-4.1-28.7 ECM4100 Data Sheet ECM4100 User Manual ECM4100 Warranty Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page *Collections are not permitted due to health & safety regulations* This part is made up of the following items:1 x FE-HV-ECM-4100 Fox Energy Cube 4.03kWh HV Battery (Master) 6 x FE-HV-ECS-4100 Fox Energy Cube 4.03kWh HV Battery (Slave) Fox Energy Cube 4.1kWh - Stack of 3 (28.21kWh) Incl. Master ECM4100 4.03kWh CapacityScalable to 28.21kWh 90% Depth of DischargeWide Temperature TolerenceEasy InstallationCAN/RS485 CommunicationHigh Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post installation.Weight: 74.3kgDimensions (Width, Hight, Depth): 570mm x 350mm x 380mmThis battery stack allows for a MAXIUMUM OF 7 modules in a series and must include 1 Master

Fox ECS4300 4.14kWh HV Battery (Slave) #2: FE-HV-ECS-4300 Storage Systems - Li-ion Battery Pack Fox's ECS is a high-performance, scalable battery storage system. Its modular design allows for maximum flexibility. It is suitable for a broad range of storage applications. Additional batteries can be added, with a maximum storage capacity of 29.03 kWh. Fox ECS4300 4.14kWh Battery (Slave) Fox ECM4300 Datasheet Fox Product Compatibility Fox ECM4300 User Manual Fox ECM4300 Warranty *Collections are not permitted due to health & safety regulations Features: Plug and play easy install 4.14kWh Capacity Scalable to 29.03kWh 90% Depth of Discharge Wide Temperature Tolerance CAN/RS485 Communication High Voltage Specs: Weight: 38.3 kg Rated Power: 4,300 W Battery Type: Lithium Ion Nominal Energy: 4145 Wh Depth of discharge: 90.00 % Voltage: 57 V Continuous Discharge Rate (Normal Use): 2875 W Maximum Discharge Rate (5 Minutes): 2875 W Surge Discharge Rate (15 Seconds): 3737 W Maximum Charge Rate (5 Minutes): 2875 This battery requires a MINIMUM of 2 modules to work (Master + Slave). This battery can accommodate up 7 modules in a stack (1x Master + 6x Slaves).   If you are adding battery modules to an existing Energy Cube stack, please made sure that the new batteries are compatible with your original battery module. Must be installed by a qualified electrician.   Please note: In order to increase the product warranty from 5 to 10 years you must register your install with Fox online to activate the 10 year warranty, otherwise it's 5 years as standard. Please click here for registration page. You can review the warranty document for more information.

Fox ECS 4.14kWh HV Battery (Master) #2: FE-HV-ECM-4300 Storage Systems - Li-ion Battery Pack Fox's ECS solar battery storage is a high-performance, scalable battery storage system. Its modular design allows for maximum flexibility. It is suitable for a broad range of storage applications. Additional batteries can be added, with a maximum storage capacity of 29.03 kWh. Fox ECM4300 Datasheet Fox Product Compatibility Fox ECM4300 User Manual Fox ECM4300 Warranty Features: Plug and play easy install 4.14kWh Capacity Scalable to 29.03kWh 90% Depth of Discharge Wide Temperature Tolerance CAN/RS485 Communication High Voltage Specs: Weight: 38.3 kgRated Power: 4,300 WBattery Type: Lithium IonNominal Energy: 4145 WhDepth of discharge: 90.00 %Voltage: 57 VContinuous Discharge Rate (Normal Use): 2875 WMaximum Discharge Rate (5 Minutes): 2875 WSurge Discharge Rate (15 Seconds): 3737 WMaximum Charge Rate (5 Minutes): 2875 W       This solar battery storage requires a MINIMUM of 2 modules to work (Master + Slave). This battery can accommodate up 7 modules in a stack (1x Master + 6x Slaves)   If you are adding battery modules to an existing Energy Cube stack, please made sure that the new batteries are compatible with your original battery module. Must be installed by a qualified electrician.   Please note: In order to increase the product warranty from 5 to 10 years you must register your install with Fox online to activate the 10 year warranty, otherwise it's 5 years as standard. Please click here for registration page. You can review the warranty document for more information.

Fox ECS EC4800-2H, 4.74kWh HV Battery (Master) #1: FE-HV-ECM-4800 Please note these are V2 batteries and only compatible with other V2 Cube batteries Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 41 kgBattery Type: Lithium IonNominal Energy: 4660 WhDepth of discharge: 90.00 %Voltage: VContinuous Discharge Rate (Normal Use): 2330 WMaximum Discharge Rate (5 Minutes): 4660 WSurge Discharge Rate (15 Seconds): 5785 WMaximum Charge Rate (5 Minutes): 4660 W

SPECIAL OFFER - Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) Battery #1: FE-HV-ECS-4800 Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Foc HV chargers only available on our Fox HV main page ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.24kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage This battery requires a MINIMUM of 2 modules to work (Master + Slave), This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 41 kgBattery Type: Lithium IonNominal Energy: 4450 WhDepth of discharge: 90.00 %Voltage: VContinuous Discharge Rate (Normal Use): 2225 WMaximum Discharge Rate (5 Minutes): 4450 WSurge Discharge Rate (15 Seconds): 3000 WMaximum Charge Rate (5 Minutes): 4450 W

Fox ECS HV ECM4800-2H, 9.32kWh 1x Master 1x Slave solar battery storag #1: FE-HV-EC-2-4.8-9.6 Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page This product is made up of the following items:1 x FE-HV-ECM-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Master) 1 x FE-HV-ECS-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 82 kgBattery Type: Lithium IonNominal Energy: 9320 WhDepth of discharge: 90.00 %Voltage: 89 VContinuous Discharge Rate (Normal Use): 2240 WMaximum Discharge Rate (5 Minutes): 4480 WSurge Discharge Rate (15 Seconds): 5785 WMaximum Charge Rate (5 Minutes): 4480 W

Fox ECS HV ECM4800-2H, 13.98kWh 1x Master 2x Slave #1: FE-HV-EC-3-4.8-14.4 Please note these are V2 batteries and only compatible with other V2 Cube batteries Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page This product is made up of the following items:1 x FE-HV-ECM-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Master)2 x FE-HV-ECS-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. A1ditional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 123 kgBattery Type: Lithium IonNominal Energy: 13980 WhDepth of discharge: 90.00 %Voltage: 134 VContinuous Discharge Rate (Normal Use): 3360 WMaximum Discharge Rate (5 Minutes): 6720 WSurge Discharge Rate (15 Seconds): 8736 WMaximum Charge Rate (5 Minutes): 6720 W

Fox ECS HV ECM4800-2H, 18.64kWh 1x Master 3x Slave solar battery storage #1: FE-HV-EC-4-4.8-19.2 Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page This product is made up of the following items:1 x FE-HV-ECM-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Master)3 x FE-HV-ECS-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 164 kgBattery Type: Lithium IonNominal Energy: 18640 WhDepth of discharge: 90.00 %Voltage: 179 VContinuous Discharge Rate (Normal Use): 4480 WMaximum Discharge Rate (5 Minutes): 8960 WSurge Discharge Rate (15 Seconds): 11648 WMaximum Charge Rate (5 Minutes): 8960 W

Fox ECS HV ECM4800-2H, 24kWh 1x Master 4x Slave solar battery storage #1: FE-HV-EC-5-4.8-24 Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understanding Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page This product is made up of the following items:1 x FE-HV-ECM-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Master)4 x FE-HV-ECS-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 205 kgBattery Type: Lithium IonNominal Energy: 23300 WhDepth of discharge: 90.00 %Voltage: 224 VContinuous Discharge Rate (Normal Use): 5600 WMaximum Discharge Rate (5 Minutes): 11200 WSurge Discharge Rate (15 Seconds): 14560 WMaximum Charge Rate (5 Minutes): 11200 W

Fox Energy Cube HV ECM4100, 28.21kWh 1x Master 5x Slave #1: FE-HV-EC-6-4.8-28.8 Please view our battery storage information page for sizing and selecting the right battery storage system for you. Fox Cube EC4800 Data Sheet Fox Cube EC4800 Manual Fox Cube EC4800 Warranty *Collections are not permitted due to health & safety regulations* Suitable for charging from the grid such as Economy 7 & Octopus Go. For detailed explanation of how to maximise Economy 7 essential information to work out which battery storage options is best for you please visit - Understaning Economy 7 Compatible with Fox HV chargers only available on our Fox HV main page This product is made up of the following items:1 x FE-HV-ECM-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Master)5 x FE-HV-ECS-4800 Fox ECS EC4800-2H, 4.74kWh HV Battery (Slave) ECS is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility, making it suitable for a broad range of storage applications. Additional batteries can be installed in series, allowing for a maximum storage capacity of 33.24kWh. Installation is easy, with a plug and play solution that can save valuable time for installers. 4.74kWh Capacity Scalable to 33.2kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN/RS485 Communication High Voltage The quick & easy install feature allows for more ECM4800-2H battery modules to be added post installation. This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves) Weight: 246 kgBattery Type: Lithium IonNominal Energy: 27960 WhDepth of discharge: 90.00 %Voltage: 268 VContinuous Discharge Rate (Normal Use): 6720 WMaximum Discharge Rate (5 Minutes): 13440 WSurge Discharge Rate (15 Seconds): 17472 WMaximum Charge Rate (5 Minutes): 13440 W

Fox EQ4800, 4.66kWh HV Battery (Master) #2: FE-HV-EQM-4800 Storage Systems - Li-ion Battery Pack Fox's EQ is a high-performance, scalable battery storage system. The modular design allows for maximum flexibility. It is suitable for a broad range of storage applications. Additional batteries can be added for a maximum storage capacity of 41.94kWh.   EQ4800 are compatible with ECS-4800 batteries Fox EQ4800 Datasheet Fox Product Compatibility Fox EQ4800 Warranty Features: Plug and play easy install 4.66kWh Capacity Scalable to 41.94kWh 90% Depth of Discharge Wide Temperature Tolerance CAN/RS485 Communication High Voltage Specs: Weight: 42 kgRated Power: 4,800 WBattery Type: Lithium IonNominal Energy: 4660 WhDepth of discharge: 90.00 %Voltage: 89.6 VContinuous Discharge Rate (Normal Use): 2330 WMaximum Discharge Rate (5 Minutes): 4460 WSurge Discharge Rate (15 Seconds): 5785 WMaximum Charge Rate (5 Minutes): 4460 W This battery requires a MINIMUM of 2 modules to work (Master + Slave). This battery can accommodate up to 9 modules in a stack (1x Master + 8 x Slaves) If you are adding battery modules to an existing Energy Cube stack, please made sure that the new batteries are compatible with your original battery module. Must be installed by a qualified electrician. Please note: In order to increase the product warranty from 5 to 10 years you must register your install with Fox online to activate the 10 year warranty, otherwise it's 5 years as standard. Please click here for registration page. You can review the warranty document for more information.