Solar Panel Calculator
Estimate how many solar panels you need and your potential savings.
US average: ~900 kWh/month
About Solar Panels
Solar panels convert sunlight into electricity, and their output depends on panel wattage, sun exposure, and system efficiency. Modern residential panels typically range from 300-500 watts each. System efficiency (usually 75-85%) accounts for losses from inverters, wiring, shading, and temperature. Peak sun hours vary by location - the US Southwest gets 6-7 hours while the Northeast gets 3-4. The federal solar tax credit (ITC) currently offers 30% back on system costs. Most systems pay for themselves in 6-10 years and last 25-30 years with minimal maintenance.