Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Electrical power/ CALCULATOR
Inverter running and motor-start screen
Compare one documented motor start plus other loads with derated continuous and surge inverter ratings.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Other loads already running (W)
- Exclude the motor entered below.
- Motor running demand (W)
- Use documented or measured real running power.
- Motor total starting demand (W)
- Use total starting watts or a manufacturer-supported equivalent, not an assumed universal multiplier.
- Inverter continuous rating (W)
- Use the applicable output rating at the intended temperature, voltage and power factor.
- Inverter surge rating (W)
- The rating must last at least as long as the documented motor start.
- Usable rating allowance (%)
- Allowance for operating condition and design margin; follow manufacturer limits.