Inverter Sizing Calculator
Select the appliances you might realistically run at the same time to get a recommended inverter size, with a margin for continuous load and a surge estimate to check against your inverter’s peak rating.
Select what you might run at the same time:
Continuous Watts Needed
180W
Recommended Inverter Size
300W
Recommendation includes a 20% margin over continuous load. Estimated surge/startup draw for your selection: ~360W — check this against your inverter’s peak/surge rating, not just continuous.
Like the inverter sizing calculator? It's one tab out of nine.
The full Van Build Tracker links your electrical, budget, weight, and shopping-list sheets together — so changing one number updates your whole build automatically. This calculator alone can't do that.
See the Full Spreadsheet — $39