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Summary of Contents for Fox ESS US Series
- Page 1 US Series Energy Storage System User Manual User Manual US Series Energy Storage System Fox ESS CO., LTD.
- Page 2 This manual is intended for use by qualified electricians. The tasks described in this manual only can be performed by qualified electricians. Please read this document carefully before installing or using the US Series Energy Storage System. Failure to follow any instructions or warnings in this document may result in damage...
- Page 3 5 Service and Maintenance ..............................30 5.1 Troubleshooting ................................30 5.2 Service and Maintenance ............................ 45 6 Decommissioning ..................................46 6.1 Dismantling the US Series Energy Storage System ................46 6.2 Packaging ..................................46 6.3 Storage and Transportation ..........................46 7 Appendix: Fox ESS Three-line Diagram ..................... 47...
- Page 4 The devices in the US series energy storage system are electrical devices. Please read this entire document to ensure the proper use of the US series energy storage system. Failure to follow this may void the warranty. Please strictly follow the safety instructions in this manual during operation, otherwise it may result in equipment malfunction, electrical shock, series injury or death.
- Page 5 US Series Energy Storage System User Manual The electrical installation & maintenance of the equipment shall be conducted by a licensed electrician and shall comply with local wiring rules and regulations. Please operate the equipment under the condition that you are ...
- Page 6 US Series Energy Storage System User Manual underneath the product. When handling the product, please consider the weight of the product and take care to maintain balance to prevent the product from tipping or falling. Note! Before handling the product, always check to make sure that the ...
- Page 7 US Series Energy Storage System User Manual the positive and negative polarity of the PV string and insert the DC connector into the corresponding DC terminal. During the installation and operation of the equipment, please make sure that the positive or negative pole of the PV string will not be shorted to ground.
- Page 8 To avoid the risk of electric shock, do not perform any other maintenance operations beyond those described in this manual. If necessary, contact Fox ESS. Otherwise loss caused is not covered by the warranty. 1.3.6 Disposal Safety Please scrap the product in accordance with relevant local regulations and standards to avoid property losses or casualties.
- Page 9 Device) to protect against possible electrocution in case of a malfunction of the PV array, cables or inverter (DC). The RCD in the Fox ESS inverter can detect leakage on the DC side. There are 2 trip thresholds for the RCD as required by the UL1741 standard.
- Page 10 US Series Energy Storage System User Manual 2 System Overview The US Series Energy Storage System is a whole home energy solution for residential users. The two key components are a hybrid inverter which can convert solar energy to AC energy and store energy into battery, and an energy storage battery. Users can monitor and operate their storage system remotely via the FoxCloud US mobile phone app.
- Page 11 US Series Energy Storage System User Manual H1-11.4-U Module H1-3.8-US H1-5.7-US H1-7.6-US H1-9.6-US PV INPUT Max. solar STC power 7600 11400 15200 19200 22800 Nominal DC voltage Max. DC voltage (V) System startup voltage (V) MPPT voltage range 80-550V MPPT voltage range 204–500...
- Page 12 US Series Energy Storage System User Manual Operating AC frequency 57~63 range (Hz) Output power >0.99 (0.8 leading - 0.8 lagging) factor Total harmonic <3% distortion INPUT AC (Grid side) Max.AC input 3800 5700 7600 9600 11400 power (W) Input voltage...
- Page 13 US Series Energy Storage System User Manual Max. continuous AC output 17.4 26.1 34.8 44.0 52.3 current (A) Nominal AC output frequency (Hz) 48 @H2 48 @H2 48 @H2 48 @H2 48 @H2 Battery Battery Battery Battery Battery 72 @H3...
- Page 14 US Series Energy Storage System User Manual Nominal AC output frequency (Hz) Operating AC frequency range 57~63 (Hz) Output power >0.99 (0.8 leading - 0.8 lagging) factor Total harmonic <3% distortion Maximum output overcurrent protection INPUT AC (Grid side) Max.AC input...
- Page 15 US Series Energy Storage System User Manual Peak output power for 60 5130 7695 10260 12960 15390 sec. (W) Peak output power for 10 min. 4560 6840 9120 11520 13680 Nominal AC 120 V/240 V output voltage Max. continuous AC output 17.4...
- Page 16 US Series Energy Storage System User Manual Max. continuous charge and discharge current (A) Max. continuous 14400/1056 5700/4180 8550/6270 11400/8360 17100/12540 charge/discha rge power (W) Peak discharge current for 60 sec. (A) communicatio CAN2.0 n interface AC1-3.8-U AC1-11.4-U Module AC1-5.7-US AC1-7.6-US...
- Page 17 US Series Energy Storage System User Manual Efficiency, Protection and Standard Module H1-3.8-US H1-5.7-US H1-7.6-US H1-9.6-US H1-11.4-US EFFICIENCY Max. solar 97.4% 97.8% efficiency Max. efficiency 91.8% 92.0% (PV-BAT-AC) Round-trip 90.7% 90.9% efficiency CEC efficiency 95.5% 96.5% 96.5% 97.0% 97.0% (BAT) CEC efficiency 96.0%...
- Page 18 US Series Energy Storage System User Manual Round-trip 90.90% efficiency CEC efficiency 95.5% 96.5% 96.5% 97.0% 97.0% (PV) PROTECTION DC surge Type II protection Insulation resistance monitoring AC surge Type II protection AC short-circuit protection Ground fault monitoring Grid monitoring...
- Page 19 US Series Energy Storage System User Manual Internal consumption at <25 W night Topology Transformerless Cooling method Natural convection Maximum number of inverters (Parallel) Display LED, App, Website Communication CAN2.0, RS485, Meter, CT, ISO alarm, SUNSPEC interface Monitoring Module: Smart...
- Page 20 US Series Energy Storage System User Manual Communication CAN2.0, RS485, Meter, CT, ISO alarm, SUNSPEC interface Monitoring Module: Smart Optional WiLAN/GPRS Warranty Standard 12.5 years 2.1.2 ECS 4000 Battery The ECS 4000 battery is a stackable modularized battery which stacks up to 7 modules in US. The battery is capable of storing excess energy generated during times of low demand and supplying it during times of high demand.
- Page 21 US Series Energy Storage System User Manual Operating temperature -10 °C~ 55 °C Storage temperature -20 °C~ 55 °C Humidity 5 %~95 % Normal voltage 57.6 V Normal capacity 69 Ah Normal energy 3.97 kWh Battery voltage range 48.6 V~65.7 V Max.
- Page 22 US Series Energy Storage System User Manual Constant current and constant voltage charging cut-off current (A) Peak discharge Current (60s) (A) Storage -20 ~55 temperature (°C) Operating Charge: 0 ~55 Temperature range Discharge: -10 ~55 (°C) Discharge capacity 55@-20±2°C @0.5C 69@25±2°C @0.5C 69@55±2°C @0.5C (Ah) ≥6000 @25°C @ 70%SOH...
- Page 23 US Series Energy Storage System User Manual 2.2 Backup Options The backup options of the US Series Energy Storage System include whole-home backup and partial backup. The selection of load for different options should be finalized during the system design phase.
- Page 24 This ensures that the backup loads get priority power supply while the non-backup loads remain unpowered. 2.3 Operating Mode The US Series Energy Storage System supports several operating modes, including Mandatory, Self-Power, Time of Use (TOU), and Backup Standby. Mandatory Mode...
- Page 25 US Series Energy Storage System User Manual the battery to 100% State of Charge (SOC) from solar and the grid, or discharge the battery to power for the household loads or grid. Self-Power Mode When the operating mode is set to the Self-Power, the system is designed to store any surplus electricity generated by the solar system after meeting the power requirements of the household loads.
- Page 26 2.4 Key Functions Emergency Stop In an emergency, manually turn off the E-STOP switch, if installed. Otherwise remove the E-STOP switch. The US Series Energy Storage System shuts down after the E-STOP is triggered. Note! After the emergency shutdown, the home will lose power.
- Page 27 US Series Energy Storage System User Manual Full Charge Protection When the US Series Energy Storage System is off-grid, the relay in the hybrid inverter will be automatically turned off as soon as one battery is full (SOC=100%). After the US Series Energy Storage System meets the recovery conditions, the relay in the hybrid inverter will be automatically turned on.
- Page 28 US Series Energy Storage System User Manual 3 Power Control System This system is equipped with a power control system (PCS). All PCS controlled busbars or conductors shall be protected with suitably rated overcurrent devices appropriately sized for the busbar rating or conductor ampacity.
- Page 29 US Series Energy Storage System User Manual 3.2 Operation Modes Mandatory Mode (Unrestricted Mode) When the operating mode is set to the Mandatory, the system will compulsively charge the battery to 100% State of Charge (SOC) from solar and the utility grid, or discharge the battery to power for the household loads.
- Page 30 US Series Energy Storage System User Manual Select Self-Power Disable NEM3.0 schedules Set SOC Value for backup power Note! The maximum operating currents in controlled busbars or conductors are limited by the settings of the power control system and may be lower than the sum of the currents of the connected controlled power sources.
- Page 31 It allows personalized household electricity plans to make your life easier. The home screen of the FoxCloud US app displays real-time data from the US Series Energy Storage System to help you understand the working status of your home power system.
- Page 32 US Series Energy Storage System User Manual 5 Service and Maintenance This section contains information and procedures for solving possible problems with the US Series Energy Storage System and provides you with troubleshooting tips to identify and solve most problems that can occur.
- Page 33 US Series Energy Storage System User Manual consent of the local power operator. 1. If the alarm is triggered accidentally, it may be due to temporary abnormalities in the power grid. The inverter will automatically recover after the power grid has resumed normal functioning.
- Page 34 US Series Energy Storage System User Manual switch and the output power cable. The grid voltage drops dramatically or 1. The inverter monitors its the power grid external working conditions in Shutdown, or the output real time. And it can...
- Page 35 US Series Energy Storage System User Manual grid frequency is within the acceptable range. If not, contact the local power operator. If so, modify the grid underfrequency protection threshold with the consent of the local power operator. 1. If the alarm is triggered...
- Page 36 US Series Energy Storage System User Manual The grid voltage drops 1. The inverter monitors its dramatically or external working conditions in the power grid Shutdown, real time. And it can or the output alarm automatically recover after load is reporting, the fault is rectified.
- Page 37 US Series Energy Storage System User Manual 1. If the alarm is triggered accidentally, it may be due to temporary abnormalities in the power grid. The inverter inverter will automatically Shutdown, recover after the power grid alarm has resumed normal...
- Page 38 US Series Energy Storage System User Manual to the TN power grid, check whether the voltage of the neutral wire to ground is normal. 1. If the alarm is triggered accidentally, it may be due to Shutdown, temporary abnormalities in alarm the power grid.
- Page 39 US Series Energy Storage System User Manual The temperature of INV IGBT is 1. Check the ventilation and higher than the ambient temperature at the Shutdown, threshold. inverter installation position. alarm 1. The inverter is 2. If the ventilation is poor or...
- Page 40 US Series Energy Storage System User Manual The inner temperature of inverter is higher 1. Check the ventilation and than the upper ambient temperature at the Shutdown, threshold . inverter installation position. alarm 1. The inverter is 2. If the ventilation is poor or...
- Page 41 US Series Energy Storage System User Manual Shutdown, alarm The power of the reporting, Off-Grid Load is Load Check if the power of the higher than the 1136 Overpower Major automatic Off-Grid Load exceeds the upper threshold Fault recovery permitted value.
- Page 42 US Series Energy Storage System User Manual rectified. inverter plant, check whether grid or transient output the output is overloaded or current exceeds short-circuited. If the fault the upper persists, contact your threshold and, installer. which triggers the inverter protection.
- Page 43 US Series Energy Storage System User Manual fault is inverter and the battery are rectified. properly connected. 2. Send a shutdown command on the app. Turn off the AC output switch, DC input switch, and battery switch in order, and then turn...
- Page 44 US Series Energy Storage System User Manual exceeds the your installer. upper threshold. 3. The inverter is not working properly. 1. If the FAULT indicator on the front of the battery pack is ON or flashing, contact your installer. 2. Check that the...
- Page 45 US Series Energy Storage System User Manual 1. Check that the communications cable and power cable between the inverter and the battery are Shutdown, properly connected. alarm 2. Send a shutdown reporting, 1. The battery is command on the app. Turn faulty.
- Page 46 US Series Energy Storage System User Manual 2. If the fault still exists, contact your installer. Communica The RS485 tion Fault Check that the communication between communications cable and Alarm cables of the 1285 Communica Minor power cable between the...
- Page 47 - Do not attempt to repair the system by yourself. Contact the professionals qualified by Fox ESS. - If the problem cannot be solved via the above solution, contact Fox ESS customer service for further assistance. Please be prepared to describe details of your system...
- Page 48 US Series Energy Storage System User Manual 6 Decommissioning 6.1 Dismantling the US Series Energy Storage System - Turn off the PV/DC switch and battery. Wait for 5 minutes for the hybrid inverter to fully de-energize. - Disconnect communication and optional connection wirings. Remove the hybrid inverter from the bracket.
- Page 49 7 Appendix: Fox ESS Three-line Diagram Whole-home Backup (DC Couple) I1* I1 I2*I2 E-STOP GND BAT MPPT Grid Backup Inverter E-STOP Grid CTs Utility Backup Loads Main Panel Panel Panel Panel Note * If there are ≤ 3 PV strings, 3 PV strings are preferentially connected to terminals 1A+, 1A-, 2+, 2-, 3+, 3-.
- Page 50 Fox ESS Three-line Diagram Whole-home Backup (AC Couple) I1* I1 I2*I2 I* I E-STOP GND Grid Backup Inverter E-STOP Grid CTs Solar CT Main Panel Utility Solar Inverter Backup Loads PV Panel Wire Gauge Guide(copper) L1/Negative Label Input Terminal Conductor...
- Page 51 Fox ESS Three-line Diagram Partial-home Backup (DC Couple) I1* I1 I2*I2 E-STOP GND BAT MPPT Grid Backup Inverter E-STOP Utility Grid CTs Panel Panel Panel Subpanel Main Panel Note * If there are ≤ 3 PV strings, 3 PV strings are preferentially connected to terminals 1A+, 1A-, 2+, 2-, 3+, 3-.
- Page 52 Fox ESS Three-line Diagram Partial-home Backup (AC Couple) I1* I1 I2*I2 I* I E-STOP GND Grid Backup Inverter E-STOP Utility Grid CTs Solar CT Main Panel Subpanel Solar Inverter Non-backup Loads PV Panel Backup Loads Wire Gauge Guide(copper) L1/Negative Label...
- Page 53 US Series Energy Storage System User Manual The copyright of this manual belongs to Fox ESS CO., LTD. Any corporation or individual should not plagiarize, partially or fully copy (including software, etc.), and no reproduction or distribution of it in any form or by any means is permitted.
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