Inverter Sizing Tool

Calculate the right inverter size based on your AC loads, surge requirements, and system voltage.

AC Loads

Appliance

Watts

Surge ×

Qty

Always On

Peak W

1200

System Configuration

System Voltage

Waveform

Safety Margin1.25×

1.0×1.25×1.5×2.0×

1.25× is recommended. Use higher for heavy inductive loads.

Custom Inverter (Optional)

Sizing Result

Continuous Load

1125

Peak Surge

1325

Recommended Min

1500

W continuous

DC Current Draw

138.9

Compatible Inverters

Best Match

Victron Phoenix 12/2000

Pure Sine

Continuous

2000W

Surge

4000W

Efficiency

94%

Headroom

78%

Victron Phoenix 12/3000

Pure Sine

Continuous

3000W

Surge

6000W

Efficiency

94%

Headroom

167%

Surge Multiplier Reference

Resistive loads (heaters, lights)1×

Electronics (laptops, TVs)1×

Refrigerator / Compressor3×

Microwave1.5×

Power tools (drill, saw)3×

Air conditioner3.5×

Water pump3×

Washing machine2.5×