Solar-Estimate
Uses local climate data, your roof measurements, current local electric rates and current solar system cost to generate an accurate solar cost and savings estimate, customized for your home.
A 3 kW solar panel system costs $9,150 in 2025 before incentives. A 3 kW solar panel system produces about 4,356 kWh of electricity annually, but the exact amount depends on where you live and how much sun you get. DIYing a 3 kW solar panel system usually isn't your best bet: You're much better off hiring a professional solar company.
If you've been considering solar, you're probably curious about costs —and maybe a little envious of neighbors who've already made the switch and are enjoying lower electric bills. A 3 kilowatt (kW) solar panel system can help power your home while significantly reducing monthly utility costs.
Cost per kWh shows the lifetime cost of solar electricity by dividing your net system cost by total expected energy production over 25 years. This typically ranges from 6-8 cents per kWh, compared to current grid electricity averaging 16.44 cents per kWh nationally.
A 3 kW solar panel system generates approximately 4,356 kWh of electricity each year. That's enough to keep 79 TVs running, power 3 refrigerators, or meet the energy needs of an RV (the average U.S. shopper on EnergySage needs about 12 kW of solar for their home). But what else could it do?
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