Advanced 20-year solar payback with degradation, rate inflation, export credits, incentives, and cumulative savings vs. status quo.
Need to maximize your yield? Check shading patterns first with our Solar Shading Analysis— partial shade can shift payback by years.
Federal/state rebates in dollars — reduces net upfront cost
Expected first-year production after install
Same default as Solar Panel Degradation (0.5%/yr)
Credit for surplus kWh sent to grid
Share of generation used at home vs. exported
Escalation on retail & export rates each year
$37,423.00 over 20 yr · NPV $9,176.00 · 90.9% output in yr 20
Total 20-year savings
Status quo grid cost $39,994.00
Simple NPV
Discounted at your energy inflation %
Net benefit vs. no solar
Net install $18,000.00
Break-even at Year 10.8 · Year 20 net: $19,423.00 · Status quo cost: $39,994.00
Compare cumulative bill savings with the escalating cost of buying the same kWh from the grid.
| Year 1 — annual savings | $1,467.00 |
|---|---|
| Year 1 — cumulative savings | $1,467.00 |
| Year 1 — grid cost (no solar) | $1,568.00 |
| Year 1 — net position | -$16,533.00 |
| Year 5 — annual savings | $1,619.00 |
| Year 5 — cumulative savings | $7,710.00 |
| Year 5 — grid cost (no solar) | $8,239.00 |
| Year 5 — net position | -$10,290.00 |
| Year 10 — annual savings | $1,830.00 |
| Year 10 — cumulative savings | $16,426.00 |
| Year 10 — grid cost (no solar) | $17,555.00 |
| Year 10 — net position | -$1,574.00 |
| Year 20 — annual savings | $2,339.00 |
| Year 20 — cumulative savings | $37,423.00 |
| Year 20 — grid cost (no solar) | $39,994.00 |
| Year 20 — net position | $19,423.00 |
Save Report: Download a PDF via JoinMyPDF or add this run to a project for a combined export.
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