Solar System Sizing Guide
Translate annual usage into a transparent planning estimate before reviewing a site-specific production model.
Informational Guide Only
This guide is provided for educational and informational purposes only. LocalServicesMatcher is a lead generation and matching platform that connects consumers with independent service providers. We do not provide services directly, and the information here should not be considered professional advice. Service availability, pricing, methods, and results vary by provider. Always consult with licensed professionals for your specific situation.
Estimate a planning-level solar size
Use twelve months of electricity consumption when possible. This calculator does not model your roof, shade, weather file, utility rules, or equipment limits.
How this tool should be used
Estimated DC size equals target annual kWh divided by annual peak-sun-hours and a user-selected performance ratio. Panel count divides DC watts by panel wattage and rounds up.
Review the output with a qualified professional and the applicable manufacturer instructions, local requirements, contract terms, or other authoritative documents. Tool entries are not saved or sent to LocalServicesMatcher.
Related Solar Panels Resources
Solar Cost and Payback Guide →
Compare cash price, financed total, incentives, production, and assumptions.
Home Battery Backup Guide →
Separate solar production sizing from outage-power and energy needs.
All Solar Panels Resources →
Browse the complete solar panels resource collection.
Complete Solar Panels Guide →
Review broader planning, safety, cost, and provider-selection guidance.
Need Solar Panels Help Near You?
Enter your ZIP code to check for independent professionals serving your area.
Find Local Professionals