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About
Solar Calculator makes it easy to estimate the solar system you need based on your actual electricity usage.
Add your appliances, enter their wattage and daily usage hours, and instantly calculate your estimated energy requirements and recommended solar system size.
Key Features
* Add multiple household or business appliances
* Calculate daily and monthly energy consumption
* Estimate required solar array capacity
* Calculate the recommended number of solar panels
* Estimate minimum inverter size
* Configure solar panel wattage
* Adjust peak sun hours and system efficiency
* Estimate battery backup requirements
* Add your electricity tariff to estimate potential savings
* View a clear recommended system summary
* Edit or remove appliances anytime
* Simple, fast and easy-to-use interface
* No account required
Solar Calculator is useful for homeowners, businesses, installers, students and anyone exploring solar energy requirements.
Calculations are estimates for planning and educational purposes. Actual solar system performance and equipment requirements may vary depending on location, weather, shading, temperature, equipment specifications, system losses and installation conditions. Consult a qualified solar professional before purchasing or installing equipment.
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What's New in Solar Load Calculator
1.0
September 16, 2026



