Marcus ReedUpdated Jun 24, 20268 min read
A residential solar system costs $15,000–$28,000 before incentives in 2026, and typically pays for itself in 6–12 years depending on your electricity rate and sun. Adding a battery costs $8,000–$15,000 more and lengthens payback but adds backup power.
- •Installed cost: $15,000–$28,000 for a 6–10 kW system before incentives.
- •Payback is 6–8 years in high-rate, sunny states; 13+ where power is cheap.
- •A battery adds resilience and time-of-use savings but slows ROI.
- •Payback depends more on your electricity rate than the sticker price.
A residential solar system runs $15,000 to $28,000 before incentives in 2026, and payback depends far more on your electricity rate and sun than on the sticker price.
6–10 kW system before incentives · battery adds $8,000–$15,000.
What it costs
Price scales with system size (kW) and whether you add storage. Expensive-electricity states with strong sun break even fastest.
Real payback
- •Fast (6–8 yrs): high electricity rates, strong sun, good net metering.
- •Average (9–12 yrs): mid-rate states, decent sun.
- •Slow (13+ yrs): cheap power or limited sun — batteries stretch it further.
Frequently asked
Is a battery worth it?
For backup and time-of-use savings, yes — but it lengthens payback. Add it for resilience, not pure ROI.
Reviewed by Marcus Reed · Updated Jun 24, 2026 · See our cost methodology.
