Inverter Sizing Calculator
Calculate the inverter size needed for your AC loads, accounting for surge requirements and efficiency.
W
x
%
V
Minimum Inverter Rating
1,000 W
DC Input Current (continuous)46.3 A
DC Power Draw556 W
Minimum Inverter Rating vs Continuous Load
Inverter Sizing
Formulas
Inverter Rating = Continuous Load x Surge Multiplier
DC Current = AC Load / (DC Voltage x Efficiency)
Motors and compressors draw 2-3x surge at startup. Size the inverter for the surge, not just continuous load.
Example Calculation
500 W continuous load, 2x surge, 90% efficient inverter on 12 V DC.
- 01Minimum inverter = 500 x 2 = 1000 W
- 02DC current = 500 / (12 x 0.9) = 46.3 A
- 03DC power = 500 / 0.9 = 556 W
Frequently Asked Questions
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