Frequently Asked Questions
Find answers to common questions about this calculator
Calculator Questions
Help with using our solar insolation calculator
Our calculator provides estimates based on reliable data sources from the National Renewable Energy Laboratory (NREL) and the NREL PVWatts calculator. While these estimates are generally accurate for preliminary planning, several factors can affect actual performance:
- Local shading from trees or buildings not captured in satellite data
- Microclimate variations not reflected in regional weather data
- Specific equipment performance characteristics
- Installation quality and maintenance practices
For the most accurate assessment, we recommend consulting with a professional solar installer who can perform an on-site evaluation.
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If you couldn't find the answer you're looking for, please feel free to contact us. We're here to help you understand solar energy and make informed decisions about your solar investment.