8 kW Solar System Cost (2026)
Published 2026-02-20 · Updated 2026-07-07 · MySunROI Research Team
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An 8 kW system costs roughly $22,000–$28,000 before ITC — a sweet spot for many 2,500+ sq ft homes using 900–1,100 kWh/month.
8 kW pricing
- ~18–21 panels
- Net after 30% ITC: ~$15,400–$19,600
- Payback: often 7–11 years
8 kW vs 6 kW
8 kW adds ~$4,000–$6,000 vs 6 kW but offsets more usage — better for EV owners.
Solar costs by state
Frequently Asked Questions
How many panels for 8 kW?
About 18–21 panels at 380–430W each.