PowerRuntime calculators provide planning estimates. They are not manufacturer guarantees, electrical designs, medical advice, safety certifications or substitutes for testing real equipment.
Why actual results vary
- Battery age, temperature, chemistry, state of charge and protection limits.
- Inverter efficiency, idle consumption, waveform and power factor.
- Appliance cycling, startup surge and changing operating load.
- Generator condition, fuel quality, altitude and model-specific fuel curves.
- Solar weather, shade, panel temperature, wiring and controller limits.
Safety
Confirm voltage, current, continuous watts, surge watts, connectors, grounding, ventilation and manufacturer instructions before connecting equipment. Use qualified professionals for fixed wiring, high-voltage systems, generators and critical installations.
Do not rely on a web estimate as the only backup plan for medical, life-safety, refrigeration, communications or other critical equipment. Perform a supervised real-world test and maintain an appropriate safety margin.
No warranty
Results are supplied “as is” without a promise that they will match a specific device or operating condition. You remain responsible for equipment selection, installation and use. See how PowerRuntime calculations work for the formulas, assumptions and validation approach used across the site.