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- Solar Panel SizeEstimate minimum panel wattage from daily energy use and sun hours.
- Solar Daily YieldEstimate daily energy output from panel wattage and sun hours.
- Solar Battery Bank SizeSize an off-grid battery bank from daily use and backup days.
- Solar Charge Controller SizeEstimate minimum charge controller amperage from panel watts and system voltage.
- Solar Inverter EfficiencyCalculate inverter efficiency from AC output and DC input power.
- Solar Array CurrentEstimate array current from total panel watts and system voltage.
- Solar Panel Roof SpaceEstimate how many panels fit on your roof and total system size in kW—updates live.
- Solar Payback Period (ROI)Estimate payback time and 25-year savings from system cost, production, and electricity rates.
- Solar Panel Angle & Tilt …Optimal tilt and azimuth from latitude and season—fixed, summer, or winter mounting.
- Grid-Tie Net MeteringCompare monthly bills with solar: self-use, export credits, and grid imports.
- Solar Panel DegradationEstimate remaining annual output and capacity after years of panel degradation.
- Off-Grid Generator vs. So…Compare 5- and 10-year cumulative costs of diesel generator-only power vs. a solar+battery hybrid—and estimate annual savings.