The bigger the inverter the more battery power it consumes

Do inverters use a lot of power?

Generally, yes. Inverters have an idle power usage. A Victron 48/5000 burns 30W just by being powered on. That's 0.72kWh/day or 60Ah of 12V battery capacity - would kill a medium size car battery in 24 hours even if no loads are supplied. The MPP Solar/Growatt units and most all-in-ones are notorious for high idle energy consumption.

Are battery inverters more efficient than PV inverter?

4. Inverters do not have uniform efficiency across their whole power range (most but not all will be most efficient at or near their limit) PV inverters are expected to do their best work near full load, while battery inverters normally run at a fraction of full output.

What wattage Inverter should I use?

Match the inverter’s continuous wattage rating to the battery’s discharge capacity. For a 12V 200Ah battery (2.4kWh), a 2000W inverter is ideal. Formula: Inverter Wattage ≤ (Battery Voltage × Ah Rating × 0.8). Factor in surge power needs but prioritize sustained loads.

Are oversized Power inverters bad?

An oversized power inverter can undermine the efficiency, cost-effectiveness, and longevity of your power system. While it might seem like a “safer” choice, improper sizing leads to hidden pitfalls. Here’s a detailed breakdown of the risks, solutions, and answers to critical questions. Inverters achieve peak efficiency at 70–90% load.