Got a solar proposal?
Solar Quote Review: read the proposal, not just the monthly payment.
Solar proposals mix hardware, roof work, electrical work, permitting, production modeling and financing into one presentation. The monthly payment on the cover page is rarely the part that deserves the most attention.
Upload the proposal you already have. Learn The Quote reads it as a document: what equipment is specified, what the production estimate assumes, what is excluded, and what to ask before you sign a 20-year agreement.
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Updated September 2026
Residential Solar Proposal
Illustrative sample8.4 kW DC rooftop system — composition shingle roof
- Modules21 × 400 W
- InverterString inverter + optimizers
- Est. annual production11,900 kWh (modeled)
- Main panel workDerate main breaker
- BatteryNot included
- Permit & interconnectionIncluded
Learn The Quote note
Production figures are modeled estimates — check the shading assumptions and whether any guarantee is offered in writing.
Example figures only. Real estimates vary widely by region, specification and site conditions.
What should be in the quote
What a clear solar quote normally covers.
Every contractor writes proposals differently. These are the details homeowners most often want to see spelled out before signing — a missing item is not automatically a problem, but it is usually worth a question.
- System size in kW DC and kW AC
- Panel manufacturer, model and quantity
- Panel wattage and efficiency
- Inverter or microinverter model and count
- Optimizers or rapid shutdown devices
- Racking and attachment system
- Flashing method and roof penetration detail
- Array layout and roof planes used
- Estimated annual production in kWh
- Modeling assumptions: shading, tilt, azimuth, degradation
- Monitoring platform and any subscription
- Battery model, usable kWh and backup loads
- Main panel work or line-side tap
- Conduit routing and any exterior conduit
- Roof condition assessment or roof work included
- Structural review, if required
- Permit and inspection responsibility
- Utility interconnection application handling
- Estimated timeline to permission to operate
- Equipment warranties by component
- Workmanship and roof-penetration warranty
- Production guarantee, if any
- Cash price, loan APR and term, or lease/PPA escalator
- Dealer fees and what happens if incentives are not received
Line-item breakdown
What each line on the estimate actually pays for.
| Line item | What it covers | What moves the number |
|---|---|---|
| Modules | The solar panels themselves. | Wattage, efficiency, brand tier, and total count driven by system size. |
| Inverter system | Converting DC to AC — a string inverter, microinverters or optimizers. | Architecture choice, shading conditions, panel-level monitoring and inverter brand. |
| Racking and attachments | Rails, feet, flashings and fasteners securing the array. | Roof type (shingle, tile, metal, flat), rafter spacing and wind or snow load requirements. |
| Electrical balance of system | Conduit, wiring, combiner, disconnects, rapid shutdown and labeling. | Run distance from array to panel, attic vs. exterior routing and jurisdictional labeling rules. |
| Main service work | Panel upgrade, busbar solution, derated main breaker or line-side tap. | Existing panel size, busbar rating and utility rules on back-feeding. |
| Battery storage | Battery unit, transfer equipment, critical loads panel and installation. | Usable capacity, number of units, backup scope and indoor vs. outdoor placement. |
| Roof work | Repairs, partial replacement or full re-roof before installation. | Roof age and condition; some installers require replacement before mounting. |
| Permits and engineering | Building and electrical permits, structural letter and plan sets. | Jurisdiction fees, engineering review requirements and inspection counts. |
| Interconnection | Utility application, approval and meter change to reach permission to operate. | Utility queue times, application fees and any required equipment upgrades. |
| Financing costs | Dealer fees and interest embedded in loan or lease pricing. | APR, term length, escalator rate; the same hardware can carry very different total costs by payment method. |
A higher price is not evidence of overcharging, and a lower price is not automatically a better deal. Two estimates can differ because they describe genuinely different work.
Commonly missing or unclear
The gaps homeowners notice after work has started.
- Panel and inverter model numbers absent, so warranty terms cannot be verified.
- System size given only in panel count, not kW.
- No stated modeling assumptions behind the production estimate.
- Degradation rate not disclosed in long-term savings figures.
- Main panel work described as 'if needed' with no cost.
- Roof condition not addressed on an older roof.
- Battery mentioned in the sales conversation but absent from the written scope.
- Cash price not shown alongside the financed price.
- Dealer fee not itemized.
- No statement on panel removal and reinstallation for a future re-roof.
- Escalator rate on a lease or PPA not clearly stated.
- Timeline to permission to operate not given.
Allowances, exclusions and extras
Where the final invoice can drift from the estimate.
Electrical service upgrade
Often excluded pending a load calculation. If a panel upgrade is required, it can add thousands.
Roof repair or replacement
Frequently excluded, or bundled at a price worth comparing against a standalone roofing bid.
Structural reinforcement
Some jurisdictions require an engineer's review; reinforcement work usually sits outside the base price.
Trenching for ground mounts
Distance, conduit, and restoration are separate from the array cost.
Utility-imposed upgrades
Transformer or service upgrades required by the utility are typically outside the installer's control and price.
Incentive assumptions
Proposals may show payments assuming you receive and apply a tax credit. Eligibility is personal and should be confirmed with a tax professional.
Questions to ask
Ask these before you sign.
- 1What is the system size in kW DC, and exactly which panel and inverter models are included?
- 2What annual production is estimated, and what shading and degradation assumptions produced it?
- 3Is any production guarantee offered in writing?
- 4Does my electrical panel need work, and is that cost included or excluded?
- 5What is the condition of my roof, and what happens if it needs replacement in ten years?
- 6What flashing and attachment system is used, and what warranty covers the penetrations?
- 7What are the separate warranty terms for panels, inverter, battery and workmanship?
- 8Who handles the permit, inspection and utility interconnection, and how long does it take?
- 9What is the cash price, and what is the total cost under the financing shown?
- 10Is a dealer fee included in the price, and how much is it?
- 11If I sell the home, what happens to the loan, lease or PPA?
- 12What is not included in this proposal that I should budget for?
Quote red flags
Wording that deserves a second look.
- A proposal that shows only a monthly payment and never a cash price.
- Savings projections with no stated utility rate escalation or panel degradation assumption.
- Equipment described by brand only, with no model numbers.
- 'Free solar' language, or a guarantee that you will receive a specific tax benefit.
- Pressure to sign the same day to hold an incentive or price.
- Panel upgrade or roof work listed as 'if needed' with no figure.
- Production guarantee mentioned verbally but absent from the contract.
- A lease or PPA escalator buried in a later page rather than stated up front.
None of these mean a contractor is doing anything wrong. They are simply points where the written document leaves room for interpretation.
Comparing competing estimates
Are the two bids even for the same job?
- Normalize to dollars per watt using the cash price and the kW DC size.
- Compare equipment tiers, not just system size — panel and inverter warranties differ meaningfully.
- Compare production estimates and the assumptions behind them, not just the headline kWh.
- Check whether each includes panel upgrade, roof work and battery.
- Compare payment structures separately: cash, loan and lease are not directly comparable.
- Identify any dealer fee embedded in a financed price.
- Compare workmanship and roof-penetration warranty length.
- Check who handles interconnection and what the expected timeline is.
What affects pricing
Labor rates, material costs, project complexity, geography, permitting, site access, specifications and current market conditions all move the number. There is no single universally correct price for a job, and Learn The Quote does not claim to determine one.
System size and equipment
Wattage, efficiency and inverter architecture drive hardware cost per watt.
Roof complexity
Tile, metal, steep pitch, multiple planes and limited attic access add labor.
Electrical conditions
Panel capacity and utility interconnection rules can require added work.
Permitting jurisdiction
Fees, plan review and inspection requirements vary widely between cities.
Financing method
Dealer fees and interest can add substantially to the effective cost of identical hardware.
Market conditions
Equipment supply, installer demand and incentive program changes all move pricing.
Comparing two proposals for the same job? Read our guide to comparing contractor quotes before assuming the cheaper one is the better value.
How Learn The Quote helps
An independent read of the document you already have.
Upload your quote
Upload the written solar estimate you already received. Your first Quote Snapshot is free.
We read it closely
We organize the proposal in plain English and flag items that look unclear or potentially missing.
You ask better questions
You get price context and specific questions to put to your contractor before you sign.
Learn The Quote is informational and document-based. We do not issue price verdicts, we cannot tell you a universally correct price, and this is not a substitute for licensed trade, engineering, legal or financial advice or for an onsite inspection. We are not a contractor marketplace and we do not sell your details.
Questions homeowners ask
Frequently asked questions
- What should a solar proposal specify?
- System size in kW DC, the exact panel model and count, the inverter or microinverter model, mounting hardware, the estimated annual production in kWh, warranty terms for equipment and workmanship, permitting and interconnection responsibility, and the full financing or lease terms if applicable.
- Why do two solar quotes for the same roof differ so much?
- Different system sizes, panel efficiencies, inverter architectures, roof mounting requirements, whether a panel upgrade or roof work is included, whether a battery is bundled, and — often the biggest factor — whether the price is cash, loan or lease.
- How should I read the production estimate?
- Production estimates are modeled, not guaranteed. Look for the modeling tool used, the assumed shading, azimuth and tilt, the degradation rate applied over time, and whether the proposal offers any production guarantee in writing.
- Does solar require electrical panel work?
- Sometimes. Interconnection rules limit how much solar can be back-fed into a given busbar and main breaker, so a panel upgrade, a line-side tap or a derated main breaker may be required. A proposal should say which approach it assumes and whether the cost is included.
- What about my roof?
- Mounting hardware penetrates the roof. Proposals should state the flashing and attachment system, any roof repair or replacement assumed, and whether removal and reinstallation of panels for a future re-roof is covered and at what cost.
- How do incentives work?
- Federal, state, local and utility incentives all have their own rules, deadlines and eligibility conditions, and they change. Learn The Quote reads what your proposal claims about incentives, but we do not give tax or financial advice or guarantee that you will qualify. Confirm eligibility with a qualified tax professional.
- What should I look at in solar financing?
- The APR, term, whether a dealer fee is embedded in the cash price, the escalator on a lease or PPA, what happens if you sell the home, and whether the payment shown assumes you receive and apply a tax credit.
- Can Learn The Quote tell me whether the price is fair?
- No. We do not issue price verdicts or determine a correct market price, and we do not give tax or financial guarantees. We explain what the proposal states, flag unclear or missing items, add price context and prepare your questions.
- Do you review battery storage proposals?
- Yes. Battery scope is read the same way — model, usable kWh, backup loads covered, transfer equipment, installation location and warranty terms including throughput or cycle limits.
Helpful homeowner resources
More reading before you sign.
- Electrical quote reviewPanels, service size, breakers and code-driven upgrades.
- Roofing proposal reviewSquares, tear-off, decking, underlayment and workmanship coverage.
- Contractor quote reviewWhat an independent review of a written quote covers.
- Compare two contractor quotesHow to tell whether two prices cover the same job.
- Questions to ask before signingFifteen questions on scope, allowances, payments and warranty.
- How to read a contractor quoteA plain-English walkthrough of a written proposal.
Know before you sign.
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