SpecCalc Hub · Medium
Inverter Size Calculator
Estimate continuous and surge inverter size from load, surge, margin, and power factor.
Formula
adjusted_continuous_w = continuous_load_w / power_factor recommended_continuous_w = adjusted_continuous_w * (1 + margin) recommended_surge_w = max(largest_surge_load_w, recommended_continuous_w)
Assumptions
- Inputs are user-provided.
- Results are preliminary estimates.
- User provides realistic continuous and surge load.
Limitations
- Does not guarantee motor startup compatibility or validate wiring, fuses, thermal limits, or waveform requirements.
Methodology
Applies power factor and planning margin to continuous load.
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.