Know what your solar system should cost.
Use this planning estimate, not a live market appraisal, to run independent calculations, inspect transparent assumptions, and check an installer quote before you commit.
No phone number required. We do not sell your estimate as a solar sales lead.
A decision model you can inspect.
Solar economics depend on the home, the production assumptions, and the terms in front of you. Review all three in one place.
The decision model
Costs, production, savings, and 25-year cash flow belong in the same calculation.
Change an input and see the effect. Formulas and fallback assumptions stay visible instead of disappearing behind a sales estimate.
Production assumptions
Test system size, sun hours, energy use, rates, and export value against the home you are modeling.
Quote check
Compare price, financing, proposed production, and system sizing with an independent rules-based review.
Move from a sales number to a decision you can defend.
A useful solar estimate should connect the physical home to explicit assumptions, then test the proposal against both.
Model the home
Start with annual energy use, location, roof context, and the share of consumption the system should offset.
Inspect assumptions
Review production, utility rates, export credits, degradation, and every fallback used when live data is unavailable.
Compare the quote
Put installer pricing, financing, promised output, and system size beside the independent model before signing.
Three checks before a solar commitment.
Check the physical fit, the source of every input, and the long-term economics before comparing proposals.
Does the system fit the load?
Compare annual consumption, target offset, proposed capacity, and expected production before judging price.
Can the inputs be verified?
Trace location, sun hours, rate data, export value, and financing assumptions back to a visible source.
Does the deal hold up over time?
Review cash and loan outcomes separately across payments, savings, degradation, and 25-year value.
Method note 1 of 3
Formula visibility
Core assumptions and formulas stay visible so an estimate can be inspected, challenged, and recalculated.
Questions worth settling early.
These tools support first-pass planning. They do not replace site engineering, utility approval, or a final installation design.
Start with the numbers. Then test the proposal.
Build an independent estimate or take an installer quote straight to review.