Solar

Professional solar panel cleaning costs $150–$450 per visit ($10–$20 per panel) in 2026. What annual maintenance really costs — and when cleaning pays for itself.

A home solar battery costs $9,000–$18,000 installed in 2026 — about $850–$950 per usable kWh. Powerwall 3 pricing, state rebates, and the post-tax-credit math.

$2.50-$3.20 per watt installed — $14,000-$28,000 typical. The 25D credit ended Dec 31, 2025: what incentives remain and how to compare quotes.

Without the federal credit, paybacks run 10-16 years. The 6-step check, worked examples both ways, and what still tilts the math.