Solar Proposal Review Checklist Before You Sign

A solar proposal can look simple at first: a monthly payment, a panel count, and a promise of savings. But the details behind those numbers determine whether the system fits your property, your budget, and your long-term energy goals. This solar proposal review checklist helps homeowners and business owners across Southern California and Tijuana ask the right questions before making a commitment.

The best proposal is not always the lowest-priced one or the one with the biggest advertised savings. It is the one that clearly explains what you are getting, what you will pay, how the system is expected to perform, and who will be there if your project needs attention later.

Start With Your Actual Energy Use

A reliable proposal should be built around your real electricity consumption, not a guess. Review the annual kilowatt-hours on your utility bills, especially if your usage changes by season. Air conditioning, pool equipment, electric vehicles, home offices, and business operations can all change the size of system you need.

Ask whether the design is based on 12 months of utility history. If you are planning a major change soon, such as adding an EV charger, replacing gas appliances, expanding a business, or installing a pool, mention it before the system is finalized. A system sized for yesterday’s usage may not be sized for next year’s needs.

The proposal should state the estimated annual production in kilowatt-hours and the percentage of your usage it is intended to offset. A 100% offset is not automatically the right choice. Your roof space, budget, utility rate plan, battery plans, and future electricity needs all matter.

Solar Proposal Review Checklist: Confirm the System Design

Start by confirming exactly what is being installed. Panel count alone does not tell the full story. Two proposals with the same number of panels can produce different results depending on panel wattage, roof orientation, shading, equipment quality, and system design.

Look for the panel manufacturer and model, panel wattage, inverter type, total system size in kilowatts, and estimated annual production. Your proposal should also show where equipment will be placed. For homes with multiple roof sections, a layout is especially helpful because south-, west-, east-, and north-facing roofs can perform differently.

Ask how shade was evaluated. Trees, chimneys, neighboring buildings, roof vents, and satellite dishes can affect production. Shade does not necessarily rule out solar, but it should be accounted for honestly. Microinverters or power optimizers may make sense for roofs with partial shade or multiple orientations, while a string inverter may be a practical fit for a simple, unshaded roof.

If your roof is near the end of its useful life, address that before installation. Removing and reinstalling solar later can add significant cost. A proposal that coordinates roofing and solar work can reduce scheduling headaches and help protect your investment.

Read the Price Beyond the Monthly Payment

A low monthly payment can be attractive, but it does not tell you the total cost of the project. Review the cash price of the solar system, the financed amount, interest rate, loan term, dealer fees if applicable, and the total amount you would pay over the life of the financing.

Ask for a clear breakdown of included work. In some cases, electrical panel upgrades, trenching, roof repairs, monitoring equipment, permit fees, or battery backup work may be separate costs. There is nothing wrong with an additional charge when it is necessary, but it should not appear as a surprise after you have signed.

If you are comparing financing options, look at more than the payment. A shorter loan term may create a higher monthly payment but lower total interest. A longer term may be easier on monthly cash flow but cost more over time. Cash, loans, and other payment structures each have trade-offs, so choose the option that supports your financial priorities.

Be cautious about proposals that treat tax incentives as guaranteed savings. Eligibility for federal, state, or local incentives depends on your individual tax situation and current rules. A qualified tax professional can help you understand what may apply to you.

Check Battery Storage and Backup Expectations

A battery is not the same thing as full-home backup. It can provide valuable energy storage, help you use more of your solar power after sunset, and support selected circuits during an outage. But what it powers depends on the battery size, electrical configuration, and the loads you choose to back up.

If battery storage is included, the proposal should identify the battery manufacturer, usable capacity, power output, number of batteries, and warranty. Ask which appliances and circuits will remain on during an outage. Refrigeration, lights, internet, and a few outlets are common backup priorities. Large air conditioners, electric dryers, and other high-demand equipment may require more storage, special load management, or a larger budget.

For businesses, discuss the cost of downtime. A battery may be designed to keep essential refrigeration, point-of-sale equipment, network hardware, security systems, or critical operations running. The right approach depends on what your business cannot afford to lose during an outage.

Review Savings Estimates With Healthy Skepticism

Savings projections are useful, but they are estimates, not a fixed promise. They depend on future utility rates, weather, actual energy use, system performance, rate-plan changes, and how much electricity you use when your solar system is producing.

Ask which utility rate assumptions were used and whether the estimate reflects your current plan. Southern California utility bills can be complicated, and solar customers should understand how energy exports, time-of-use pricing, and battery use affect the economics of a system.

A proposal should explain whether it assumes utility rates will rise over time and by how much. Higher escalation assumptions can make projected lifetime savings look stronger. That does not mean the projection is wrong, but it should be reasonable and clearly disclosed.

Focus on the numbers you can verify: expected annual production, system price, financing terms, and the assumptions behind the savings estimate. Clear explanations build trust. Pressure to sign before you understand the figures does not.

Confirm Warranties, Monitoring, and Service

Solar is a long-term property upgrade, so support matters after installation day. Review the separate warranties for panels, inverters, batteries, workmanship, and roof penetrations. Equipment warranties often last longer than workmanship warranties, which is why it helps to understand who handles service if something stops working.

Ask who will monitor the system and how you will access production data. A customer app can help you see whether the system is performing as expected, but monitoring is most useful when there is a clear service process behind it.

You should also know who is responsible for permits, utility interconnection, inspections, and permission to operate. A full-service solar partner should explain the project timeline in plain language, including the fact that permitting and utility approval can take longer than the physical installation itself.

Look for the Project Details That Protect You

Before signing, make sure the proposal and contract identify the licensed party responsible for the work, the equipment models, total price, payment schedule, anticipated timeline, and cancellation rights. Do not rely only on verbal promises. If a specific upgrade, warranty, production assumption, or repair is important to your decision, make sure it is documented.

For properties that need more than panels, ask how related work will be coordinated. Electrical panel upgrades, roofing, gutters, EV charging, and battery storage can involve different trades. One coordinated plan can make the project easier to manage, but you should still understand the scope and cost of each piece.

Accessible Solar & Energy Storage takes a consultative approach because customers deserve clear answers before they invest. Whether you are evaluating solar for a home, a storefront, or a larger commercial property, take the time to compare proposals side by side and ask for explanations in the language you are most comfortable using.

A good solar decision should leave you feeling informed, not rushed. Bring your utility bills, your future plans for the property, and your questions to the conversation. The right project starts with a proposal you can understand and a team you feel comfortable calling years from now.