Free Solar Tools
Size your system, calculate wire gauges, configure your battery bank, and estimate costs — all free, no signup required.
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Solar System Sizer
Enter your location and daily energy usage to get recommended panel, battery, inverter, and charge controller sizes.
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Wire Gauge Calculator
Calculate the right wire gauge for your circuit based on current, distance, and voltage. Includes NEC compliance check.
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Battery Bank Calculator
Configure your battery bank series/parallel layout with BMS and fuse sizing. Includes presets for popular batteries.
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Cost Estimator
Get an itemized bill of materials with cost estimates, Federal ITC savings, and DIY vs. professional comparison.
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