Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Independent energy/ CALCULATOR
Solar energy balance over a low-sun period
Compare estimated solar production with critical-load demand over several days.
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
- Installed solar array (kW)
- Use the DC nameplate power of the array available to this system.
- Average peak-sun hours (h/day)
- Use a location- and season-specific scenario, not an annual average for a winter check.
- Net system yield (%)
- Combined allowance for temperature, orientation, shading, wiring, conversion and availability.
- Critical-load energy (kWh/day)
- Daily energy for only the loads that must remain supplied.
- Scenario duration (days)
- Choose a consecutive low-sun period relevant to the operating plan.