3 calculators in this category
- Solar System Size (kW) CalculatorNREL PVWatts sizing methodEnter the kWh figure from your electric bill and this calculator returns the DC array size in kilowatts needed to hit your…
- Solar Panel Output (kWh) CalculatorNREL PVWatts loss modelEnter your array's DC rating, the peak sun hours your site receives, and the losses between the module glass and the meter, and…
- Solar Panel Count & Roof Area CalculatorIRC R324 / IFC 1204 access pathwaysGive this calculator a target system size and the module you intend to use, and it returns the number of modules, the total…
Which one do you need?
- Solar System Size (kW) Calculator
- Work out the solar array size in kW you need from your monthly electric bill, target offset, peak sun hours and system losses, plus the module count.
- Solar Panel Output (kWh) Calculator
- Estimate how many kWh your solar array produces each day, month and year from its DC rating, peak sun hours and system losses, with the performance ratio.
- Solar Panel Count & Roof Area Calculator
- Convert a target system size into module count, total panel area and the roof area you need including fire-access setbacks and your roof pitch.