Contractor Quote Checklist
Solar Panel Installation Quote Checklist Before Signing
Short answer: sign a solar panel quote only after it separates roof readiness, system size, production assumptions, panel and inverter specs, electrical upgrades, utility interconnection, monitoring, warranty duties, financing terms, and incentive assumptions. Do not treat a tax credit, rebate, or projected bill savings as guaranteed cash unless your own eligibility and utility approval are confirmed.
A solar quote is part construction proposal, part electrical plan, part financial projection. The sales page may focus on monthly payment or savings, but the contract should show what is being installed, how production was estimated, who handles utility approval, and what happens if the roof, panel, or interconnection process changes the design.
As of June 2026, incentive language needs careful review. IRS pages still explain the Residential Clean Energy Credit generally, but the IRS FAQ for Public Law 119-21 states that Section 25D credits are not allowed for expenditures made after December 31, 2025. Ask the installer to remove outdated assumptions from the quote and to identify only incentives you can independently verify.
Start With Roof And Electrical Readiness
The quote should state roof age, roof material, shaded areas, usable roof planes, structural concerns, attic access if needed, and whether roof repair or replacement is required before installation. If the installer did not inspect the roof, the quote should say it is conditional.
Electrical readiness matters too. Ask whether panel capacity, service rating, meter location, grounding, rapid shutdown equipment, and any main panel upgrade are included. Solar can interact with future EV charging, batteries, generators, and service changes.
Test The Production Estimate
Ask for the annual kWh estimate, assumptions about shade, azimuth, tilt, panel degradation, weather data, inverter clipping, and utility rate assumptions. A production estimate should be understandable enough to compare against your actual usage.
If the quote includes a production guarantee, read the remedy. Does the company compensate you, add panels, adjust monitoring, or only promise to inspect? A guarantee without a useful remedy is a marketing sentence.
Clarify Utility Approval And Interconnection
Energy.gov’s going-solar guidance emphasizes the process of choosing a system and working through utility and permitting steps. Ask who submits interconnection paperwork, who handles permit corrections, who schedules inspection, and what happens if the utility requires changes.
Net metering, export rates, time-of-use rates, and battery assumptions are local. The quote should not treat utility approval as automatic or promise bill savings without explaining the tariff assumptions.
Separate Equipment Warranty From Workmanship Warranty
Panels, inverters, racking, roof penetrations, monitoring hardware, and workmanship can all have different warranty terms. Ask who responds when a roof leak, inverter failure, monitoring outage, or production issue appears.
The quote should also state whether monitoring is included, who owns the monitoring account, what happens if the installer goes out of business, and whether app or portal fees can appear later.
Solar Quote Review Table
| Quote area | What to confirm | Why it matters |
|---|---|---|
| Roof readiness | Age, material, shade, penetrations, repair conditions | Roof work can change the timeline and warranty. |
| Production estimate | Annual kWh, shade, tilt, degradation, utility rate assumptions | Savings claims depend on assumptions. |
| Equipment | Panel, inverter, racking, monitoring, rapid shutdown details | Equipment terms determine performance and service path. |
| Interconnection | Permits, utility approval, inspection, net metering assumptions | Permission to operate is not the same as installation completion. |
| Financial terms | Cash price, loan terms, dealer fees, incentives, cancellation rights | Solar savings can be distorted by financing and outdated credits. |
Questions To Ask Before Signing
- Was the roof inspected, and what roof conditions could change the quote?
- What annual production estimate is promised, and what assumptions drive it?
- Who handles permits, inspection corrections, interconnection, and permission to operate?
- Are panel, inverter, racking, monitoring, and roof penetration warranties separate?
- What happens if the utility changes export or net metering assumptions?
- Does the quote include a cash price separate from loan or lease terms?
- Which incentive claims are verified, and which are only estimates or outdated assumptions?
Red Flags In This Quote
The quote shows a monthly savings number but does not show annual kWh assumptions or utility rate assumptions.
The contract includes a tax credit or rebate as if it were guaranteed cash without eligibility language.
Roof leaks, monitoring outages, inverter failures, and production shortfalls are covered by different parties but the quote does not say who responds first.
Source Links
- Energy.gov: Homeowner’s Guide To Going Solar
- Energy.gov: Step-by-Step Guide For Consumers Going Solar
- FTC: Solar Power For Your Home
- IRS: Residential Clean Energy Credit
- IRS: Public Law 119-21 Energy Credit FAQ
FAQ
Should a solar quote include a roof inspection?
It should either include roof condition assumptions or state that the quote is conditional until roof inspection is complete.
Can I rely on projected solar savings?
Only after reviewing production assumptions, utility rates, export rules, financing terms, and your actual usage. Projections are not guaranteed bills.
Is the federal residential solar credit still available in 2026?
As of June 2026, IRS FAQ language for Public Law 119-21 says Section 25D credits are not allowed for expenditures after December 31, 2025. Verify current tax guidance before signing.
What is permission to operate?
It is the utility authorization that generally comes after installation, inspection, and interconnection review. Installation alone may not mean the system can operate.
What warranties should be separated?
Separate panel performance, inverter, racking, roof penetration, workmanship, monitoring, and installer labor terms.
Internal Link Candidates
- Roof Inspection Quote Checklist
- EV Charger Installation Quote Checklist
- Electrical Panel Upgrade Quote Checklist
A solar quote is ready to sign only when the roof, production math, utility approval, warranties, and incentive assumptions are written as clearly as the system price.