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The eighth part about the development of an automatic backup power supply system for an apartment based on a 280 Ah LiFePO4 (Lithium Iron Phosphate) battery and a 3000 Watt FCHAO inverter. This video shows the modification of the box and the development of a control system based on an Arduino nano microcontroller with a connection to a JKONG BMS via the UART interface and displaying information on the LCD 1602 display. The control system has 3 operating modes: 1 - Manual mode, when the user turns the inverter on and off. 2 - Automatic, when the system turns on the inverter automatically when the voltage in the network disappears. 3 - Uninterruptible power supply mode, when the inverter and charger operate constantly. The system supports intelligent control of the cooling fan and safely turns off the inverter in case of overheating or low battery level. Previous videos from this series. Assembling a backup power supply system for an apartment using a 280 Ah LiFePO4 battery and a 3000 Watt FCHAO inverter. Mounting the equipment in a cabinet. Previous episodes: 1. Testing the GEYA G2R-63 ATS and GPS7-04 voltage relay - • Testing the GEYA G2R-63 ATS and n... 2. Laying the cable for the backup power supply system in the apartment - • Laying the cable for the backup power supply sys... 3. Installing the GEYA GPS7-04 voltage relay and the GEYA G2R-63 automatic transfer switch - • Installing the GEYA GPS7-0... 4. Powerful electronic load on Arduino + INA219 with connection to a PC - • Powerful electronic load on Arduino... 5. Bought 280 Ah LiFePO4 batteries on OLX. Unpacking, testing, measuring capacity - • Bought LiFePO4 280 Ah batteries n... 6. Assembling a LiFePO4 (lithium iron phosphate) battery - • Assembling a LiFePO4 (lithium iron phosphate... 7. Backup power supply for an apartment on a LiFePO4 280 Ah battery and a FCHAO 3 kW inverter. - • Backup power supply for an apartment on ...