How many ah battery need for 3000w for 8 hours?

To calculate the amp-hours (Ah) needed for a 3000W load over 8 hours, first determine the total watt-hours (Wh) required: 3000W × 8 hours = 24,000Wh. If you are using a 12V battery system, divide the total watt-hours by the voltage: 24,000Wh ÷ 12V = 2000Ah. Therefore, you would need a battery capacity of 2000Ah to power a 3000W load for 8 hours at 12 volts.