Solar Proposal Review Checklist
Review solar proposals with a checklist for system size, equipment, production, incentives, financing, batteries, warranties, and assumptions.
Quick answer
A solar proposal is only useful if you can compare the assumptions behind it. The cleanest review checks system size, expected production, equipment model, incentives, financing, add-ons, warranties, and contract terms before you sign.
Use this page with the Solar Cost Guide, the Solar Quote Red Flags Guide, and the Solar Panel Warranty Guide.
How to use this checklist
Read the proposal from top to bottom and compare it against the other quote side by side. If a line item is unclear, ask the installer to rewrite the assumption in plain language before you decide anything.
- Check the numbers, not just the monthly payment.
- Compare installed cash price, incentives, and equipment scope.
- Separate what is included from what is only estimated.
Proposal review checklist
This table gives you the fastest way to scan a proposal before you read every detail.
| Proposal section | What to verify | Why it matters |
|---|---|---|
| System size and production | kW size, annual production estimate, and assumptions used | These numbers determine whether the quote matches your home and usage |
| Equipment model | Panel, inverter, and battery model names plus warranties | Different equipment can change price, performance, and service support |
| Incentives and net cost | Federal, state, utility, or local incentives and who claims them | A quote can look cheap until incentive assumptions are clarified |
| Financing and payment | Loan rate, term, dealer fees, and cash-price comparison | Monthly payment offers can hide high finance costs |
| Add-ons and exclusions | Roof work, panel upgrades, battery wiring, or permit fees | Extra scope can change the final price after signing |
System size and production checks
- Does the quoted system size match your annual or monthly electricity use?
- Does the production estimate assume reasonable sun hours and shading conditions?
- Is the panel count tied to roof space or only to a theoretical design?
- Does the proposal explain any expected production losses?
Equipment model checks
- Are the panel and inverter model numbers clearly listed?
- Does the quote show the exact battery model if storage is included?
- Are the product and performance warranties named clearly?
- Does the equipment mix match your backup or efficiency goals?
Incentive and net cost checks
- Is the federal incentive treated as a tax credit rather than an upfront discount unless explicitly stated otherwise?
- Are state or utility incentives identified separately from the install price?
- Does the net cost reflect the full equipment and labor scope?
- Are you comparing a cash price to a financed price correctly?
Financing and payment checks
- What is the interest rate, term, and dealer fee?
- Does the proposal show the total paid over time, not only the monthly payment?
- Would the cash price make the system easier to compare against other quotes?
- Is the financing tied to a lease, loan, or third-party ownership structure?
Battery, roof, and electrical add-ons
- Is battery storage included, optional, or priced separately?
- Does the proposal mention roof repairs, electrical panel upgrades, or trenching?
- Are any site-survey or permit assumptions clearly stated?
- Does the system need add-on work before installation can start?
Warranty and contract terms
- Does the proposal show both product and workmanship warranty coverage?
- Are removal, labor, and shipping covered if something fails?
- Are claim steps and transfer rules easy to understand?
- Are cancellation, deposit, and schedule terms written clearly?
Final questions before signing
- What assumptions were used for system size and production?
- What is the full cash price before financing?
- Which equipment model numbers will actually be installed?
- What add-ons or exclusions could change the final cost?
- What happens if the site survey changes the design?
Bottom line
The best solar proposal is the one you can explain back in plain English. If the quote does not clearly show system size, equipment, incentives, financing, warranties, and exclusions, ask for a revised version before you move forward.
After that, compare the final numbers with the Solar ROI Calculator so you can judge whether the proposal still makes sense financially.
Evidence
Sources and methodology
SolarPel proposal review content focuses on side-by-side comparison of assumptions, scope, financing, and warranty terms rather than promotional language or sales outcomes.
checklist
Converts the proposal review process into a practical homeowner checklist that can be reused across multiple quotes.
decision table
Separates system size, equipment, incentives, financing, and add-ons into review buckets.
methodology
Keeps the review focused on comparison logic instead of installer marketing claims.
Article FAQ
Common questions
What should be in a solar proposal?
A strong solar proposal should show system size, estimated production, equipment model numbers, incentives, financing terms, warranties, and any add-ons or exclusions that affect the final price.
How do I compare two solar quotes?
Use the same assumptions on both quotes. Compare cash price, system size, equipment, incentives, financing, and scope so you are reviewing the same project structure.
Should I separate battery and roof costs?
Yes. Battery work, roof repairs, and electrical upgrades can change the price materially, so they should be shown separately whenever possible.
Written by
Firoz Ahmed
SolarPel Editorial Lead
Firoz Ahmed writes SolarPel's solar calculators, planning guides, and technical explainers with a focus on practical home-energy decisions, transparent assumptions, and source-backed solar research.