A 100Ah battery can support a 1000W inverter for roughly one hour. Avoid using a 2000W inverter with a single 100Ah battery, as it may overdraw. For higher power requirements, add more batteries or opt for a 3000W inverter to meet startup currents effectively. This capacity influences how long an inverter can run appliances before needing a recharge. However, battery capacity alone doesn't dictate inverter size. The inverter converts DC power from the battery into AC power. . A 100Ah battery can, in theory, supply 100 amps for 1 hour, or 10 amps for 10 hours, and so on. The total energy capacity depends on the battery voltage (usually 12V, 24V, or 48V). Example: 1. Battery Voltage First, check your battery's voltage. The REAL King: Continuous Discharge Current (Amps): Pay attention here, because this is everything. The actual usable energy depends on: For a 12V 100Ah battery: That means you can run a 120W device for 10 hours (roughly), or a 1000W device for just over 1 hour— if the. . In general, for a 100ah battery, a 1000 watt pure sine wave inverter will be a good suit. It provides enough power to operate a wide range of household or camping appliances. How to Choose the. .