MartyByrde
Off-Grid Innovator
Hello,
I have four 16s 280Ah LiFePo4 batteries paralleled for a total of 1120Ah. I’m not sure if my math is incorrect or if I have some settings wrong.
I am running a 3500w load. It’s my understanding that the four batteries would last for approximately 15 hours.
48v * 1120ah = 53,760 Wh
53,760 Wh / 3500w load = 15.36 hours
At 4pm today the batteries read 52.9V. By 11pm today the batteries reached 48V reading on the inverter and shut off. I checked all the BMS’s and confirmed they’re at 48V (48.4-48.6v). Over 7 hours I got 24,500 watts and some PV was still coming in until 6pm. I have 7kw of panels.
It seems like the batteries are draining rather fast. Is this correct or should I be getting longer battery power?
I have four 16s 280Ah LiFePo4 batteries paralleled for a total of 1120Ah. I’m not sure if my math is incorrect or if I have some settings wrong.
I am running a 3500w load. It’s my understanding that the four batteries would last for approximately 15 hours.
48v * 1120ah = 53,760 Wh
53,760 Wh / 3500w load = 15.36 hours
At 4pm today the batteries read 52.9V. By 11pm today the batteries reached 48V reading on the inverter and shut off. I checked all the BMS’s and confirmed they’re at 48V (48.4-48.6v). Over 7 hours I got 24,500 watts and some PV was still coming in until 6pm. I have 7kw of panels.
It seems like the batteries are draining rather fast. Is this correct or should I be getting longer battery power?