Separate energy capacity from inverter power.
Battery kWh determines roughly how much energy is available over time. Inverter kW determines how much power can be delivered at once and whether motors or compressors can start. A reliable backup plan has to check both.
- List the essential appliances first: fridge, Wi-Fi, lights, fans, pumps, work or medical loads.
- Choose a realistic outage duration instead of automatically backing up the whole house.
- Allow for appliance duty cycle, inverter losses and motor/compressor starting demand before final equipment selection.