Move the sliders to see a real 2026 estimate — with the actual Massachusetts incentive math built in, and no expired federal credit inflating the numbers.
Estimates use 2026 Massachusetts figures: ~$3.08/watt, $0.03/kWh SMART, ~31.5¢/kWh net metering, $1,000 state credit, 6.25% sales-tax exemption, ~30¢/kWh rates rising ~5%/yr. The federal credit expired Dec 31, 2025 and is not included. Your real numbers depend on your roof, usage, and utility.