Solar Inverter Size Calculator
Type your home or shop load and find the right inverter size (kW) — not too small, not too big.
Step 1: Add appliances
Total load: 0 watts
Step 2: Options
How to use
- Add all your appliances from the list (fan, fridge, AC etc.) — add anything not in the list as custom watts.
- Select future expansion (25% is recommended so you have room to add load later).
- Press "Calculate Inverter Size" — see the recommended inverter kW and category.
This is an estimate. Talk to your installer before the final selection — motor loads (pump, fridge compressor) have a higher starting surge.
Frequently Asked Questions (FAQ)
How does the inverter size calculator work?
Add your appliances with quantities, or a custom load in watts, then select future expansion - 25% extra capacity is recommended - and it recommends the right inverter size in kW and its category.
What appliances can I add?
Common appliances like fans, fridges and ACs are listed; anything not in the list can be added as a custom load in watts.
Why does it warn about motor loads?
Motor loads like water pumps and fridge compressors draw a much higher surge when starting than while running. The tool adds headroom for this, but confirm the final size with your installer.
Which connection type does the result suggest?
The tool recommends single-phase or three-phase based on your total load and the connection type you select, so the inverter matches your meter's phase.