ProMoney · Simulator
Solar Payback Simulator
When does a solar install pay for itself?
Assumptions
Payback year
Year 11
25-yr net savings
$53,752
ROI
215%
| Year | Annual Savings | Net vs. Cost |
|---|---|---|
| Year 5 | $2,431 | -$13,532 |
| Year 10 | $2,818 | -$238 |
| Year 15 | $3,267 | $15,174 |
| Year 20 | $3,788 | $33,040 |
| Year 25 | $4,391 | $53,752 |
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Built by The Crimson Bench · Educational model, not financial advice
About the Solar Payback Simulator
Model install cost against rising utility savings to find the payback year and lifetime net savings.
It's built for directional planning: change any assumption and watch the whole projection move, the way a seasoned operator pressure-tests a plan before committing capital. Everything is computed live in your browser — nothing is sent anywhere.
How the Solar Payback Simulator Works
The model takes 3 assumptions and returns 3 headline metrics plus a full breakdown. Here is exactly what goes in and what comes out — no black box.
The Inputs
| Assumption | Example value |
|---|---|
| Install cost (net) | $25,000 |
| Monthly savings (year 1) | $180 |
| Utility rate rise / yr | 3% |
Worked Example
Every figure below is produced by the live model using the example assumptions above. Change any input in the simulator to see your own numbers.
Payback year
Year 11
25-yr net savings
$53,752
ROI
215%
| Year | Annual Savings | Net vs. Cost |
|---|---|---|
| Year 5 | $2,431 | -$13,532 |
| Year 10 | $2,818 | -$238 |
| Year 15 | $3,267 | $15,174 |
| Year 20 | $3,788 | $33,040 |
| Year 25 | $4,391 | $53,752 |
The Operator's Read
Solar pays back around year 11, then produces free power — and rising utility rates make it look better every year. The financing rate versus your savings is what really decides if it's worth it.
Assumptions & Limitations
- •The model is deterministic: it projects your inputs forward with clear arithmetic, not a Monte-Carlo or probabilistic forecast. It shows one scenario at a time — run several to bracket a range.
- •Defaults are illustrative benchmarks, not your business. Replace every field with your real numbers before drawing conclusions.
- •It abstracts away taxes, financing, seasonality, and one-off events unless a field explicitly captures them. Treat the output as a directional estimate.
- •This is an educational tool, not financial, investment, tax, or legal advice. Validate real decisions with a qualified professional.
Frequently Asked Questions
What does the Solar Payback Simulator calculate?
Model install cost against rising utility savings to find the payback year and lifetime net savings. It takes 3 assumptions — Install cost (net), Monthly savings (year 1), Utility rate rise / yr — and returns Payback year, 25-yr net savings, ROI, along with a full projection table you can export.
How do I use the Solar Payback Simulator?
Enter your own figures in the input fields above — Install cost (net), Monthly savings (year 1), Utility rate rise / yr, and the rest. The model recalculates instantly and shows the resulting Payback year and full breakdown. No sign-up needed to run it.
Is the Solar Payback Simulator free?
Yes — you can run the simulator and see the headline results for free. Toolkit Pro unlocks the full projection table, Excel/PDF export, saved scenarios, and AI analysis: $180/mo, $1,728/yr, or unlock any 3 simulators for $20.
What's the difference between this and a free calculator?
A calculator answers one question. This simulator models the full picture — multiple linked assumptions, a projection table, and scenario comparison — the way an operator would build it in a spreadsheet, but instantly.
Who built the Solar Payback Simulator?
The Crimson Bench's Ivy League-educated operators — the same people we deploy into C-suites. This is the self-serve version of a model they'd build inside a live engagement.
Is this financial advice?
No. The Solar Payback Simulator is an educational modeling tool for directional planning — not financial, investment, tax, or legal advice. Validate any real decision with a qualified professional.
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The Crimson Bench · Est. 2002 · Founded in New York City
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