April 14, 20233 yr Hi All, after much research I have sadly come to the realization that for the following system: 5kw 48V Inverter 5kw 48V 100aH Batter Due to the nature of the recommended charge and discharge for LiFePo4 batteries being 0.5C, I would only be able to discharge these batteries at 2.5kw (50aH) per hour, depleting them in 2 hours. Thus my 5kw inverter is being wasted as it can only ever provide 2.5kW of power if I plan to maintain the health of my battery. So if I want to run a 5kw inverter at full load, I would need 2x the battery capacity, effectively 10kwh of batteries. Am I missing something, or is this a well-known limitation of these systems? Either I'd need 2x 48V 100aH in parallel or a 2x24V 100aH battery in series, but both would result in a total battery capacity of 10kwh, which is double the inverter rating. For interest, these are the spec sheets of the invert and battery I am considering https://www.felicitysolar.com/500v-pv-input-5000w-hybrid-inverter-with-mppt-100a-inbuilt_p71.html https://www.solarwaysuppliers.co.za/product/felicity-5kwh-48v-100ah-lifep04-battery/#
April 14, 20233 yr 33 minutes ago, D3monhun73r said: Hi All, after much research I have sadly come to the realization that for the following system: 5kw 48V Inverter 5kw 48V 100aH Batter Due to the nature of the recommended charge and discharge for LiFePo4 batteries being 0.5C, I would only be able to discharge these batteries at 2.5kw (50aH) per hour, depleting them in 2 hours. Thus my 5kw inverter is being wasted as it can only ever provide 2.5kW of power if I plan to maintain the health of my battery. So if I want to run a 5kw inverter at full load, I would need 2x the battery capacity, effectively 10kwh of batteries. Am I missing something, or is this a well-known limitation of these systems? Either I'd need 2x 48V 100aH in parallel or a 2x24V 100aH battery in series, but both would result in a total battery capacity of 10kwh, which is double the inverter rating. For interest, these are the spec sheets of the invert and battery I am considering https://www.felicitysolar.com/500v-pv-input-5000w-hybrid-inverter-with-mppt-100a-inbuilt_p71.html https://www.solarwaysuppliers.co.za/product/felicity-5kwh-48v-100ah-lifep04-battery/# No your 2x24V 100Ah will stil just give you 4.8kWh not 10kwh. There are 3C batteries. Most are 1C. You have a choice if you buy a make that is only 0.5C
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