How much does residential solar cost in 2026?
Residential solar runs $2.50 to $4.50 per watt installed in 2026. The federal Section 25D credit applied to systems placed in service on or before December 31, 2025; 2026 installs generally do not qualify under current IRS guidance — verify on IRS Form 5695.
| System size | Gross installed | Production (avg) |
|---|
| 5 kW | $12,500-$22,500 | ~6,000-8,000 kWh/yr |
| 8 kW (avg US home) | $20,000-$36,000 | ~9,600-12,800 kWh/yr |
| 10 kW | $25,000-$45,000 | ~12,000-16,000 kWh/yr |
| 15 kW (EV / electric heat) | $37,500-$67,500 | ~18,000-24,000 kWh/yr |
| 10 kW + 13 kWh battery | $33,500-$57,000 | backup-ready |
Frequently asked questions
How much do solar panels cost in 2026?
Residential solar panels run $2.50-$4.50 per watt installed in 2026. A 5 kW system costs $12,500-$22,500. An average 8 kW US home system runs $20,000-$36,000. Federal Section 25C and 25D residential energy credits applied for property placed in service on or before December 31, 2025. Projects placed in service in 2026 generally do not qualify under current IRS guidance — verify on IRS Form 5695 and the IRS Residential Clean Energy Credit page before relying on it.
What's the federal solar tax credit?
Federal Section 25C and 25D residential energy credits applied for property placed in service on or before December 31, 2025. Projects placed in service in 2026 generally do not qualify under current IRS guidance — verify on IRS Form 5695 and the IRS Residential Clean Energy Credit page before relying on it. The percentage and expiration changed under recent legislation (Inflation Reduction Act, then the 2025 OBBB). Verify the current rate and your eligibility on IRS Form 5695 before factoring it into project planning.
What size solar system do I need?
Take your annual kWh usage (from utility bills) and divide by 1,200-1,500 (depends on your sun-hours zone). A typical US home uses ~10,800 kWh/yr and needs 7-9 kW. Sun-rich zones (AZ, CA, TX) get more production per kW than cloudy zones (WA, NY).
Is battery storage worth it?
Battery is the right call if (a) you have time-of-use rates (CA NEM 3.0), (b) you want backup power, or (c) net metering pays poorly. Battery is ~30-50% of the system cost; the Federal Section 25C and 25D residential energy credits applied for property placed in service on or before December 31, 2025. Projects placed in service in 2026 generally do not qualify under current IRS guidance — verify on IRS Form 5695 and the IRS Residential Clean Energy Credit page before relying on it.
How long do solar panels last?
Panels are warrantied 25-30 years (typically retain 80-87% production at year 25). Inverters: string 10-15 yr, microinverters 25 yr. Batteries 10-15 yr.
Can I install solar myself?
Off-grid systems on cabins, RVs, sheds — yes. Grid-tie systems require licensed electrician + utility approval + permitting; DIY voids most warranties, rebates, and tax credits.
Why does the calculator show a price range?
Brand tier, roof complexity (multi-plane, steep), electrical service condition, battery, and regional installer competition swing the total 30-60%.
