3000W lead acid battery

The c-rate of lithium is 1. We can draw 100Ah x 1C = 100Amps. That is enough to power a 3,000 watt inverter without over-working the battery. You need to have 4 lithium batteries in series to power a 3,000 watt inverter. How many 100Ah batteries do I need for a 3000 watt inverter? You need 4 Lithium batteries in series to run a 3,000W inverter.

Lead-acid batteries and lithium batteries are generally popular nowadays. Lithium batteries are more expensive, but have a high energy density, use less volume when storing the same amount of energy, and have a long service life. Lead-acid batteries are cheaper but weigh more and have a shorter life span.

Lead-acid batteries have a C-rate of 0.2C, while lithium (LiFePO4) batteries have a higher C-rate of 1C. 12V for inverters below 1000W. 24V for 1000-2000W inverters. 48V for 2000-4000W inverters. We need to satisfy two criteria before we can tell you what battery you need. These are:

For example, the C-rate of a 100Ah lead-acid battery is 0.2C. That means that we can discharge the battery with a 20 Amp load (100Ah x 0.2= 20A). You can discharge the battery with a higher load, say 40Amps, but then the battery capacity will be reduced because of internal heat generation. The C-rate of lithium batteries (LiFePO4) is 1.

To keep your batteries operating safely and reliably, it is always recommended to go for a somewhat larger battery bank- generally, for lead-acid batteries 6 x 100Ah 24V battery Or 12 x 100Ah 12V battery is the smallest battery bank recommended for the 24V 3000W inverter.

For a 3000 watt inverter at 48 volts: 3000 watts / 48 volts = 62.5 amps. You would need batteries with a capacity that allows the inverter to draw 62.5 amps safely. So, you would need at least batteries with a capacity of (62.5A ÷ 0.5 =) 125 Ah 48V. - These calculations were done ignoring the inverter efficiency (inverter efficiency = 100%).