A proposal from the Sunrun solar company should be judged by the system it provides and the contract behind the payment, not by the monthly figure alone. A low payment may come with a long agreement, an annual increase, limited backup power, or savings projections that depend on assumptions you haven’t checked. Before signing, confirm how much electricity the system is expected to produce, what you’ll pay over the full term, who owns and maintains the equipment, and what happens if you sell your home. Compare those details with your utility bills and at least one alternative proposal. The right choice depends on your roof, energy use, budget, and priorities.
A useful proposal connects the equipment, the expected energy production, the payment plan, and the service obligations. If a salesperson focuses mainly on a monthly payment, ask for the documents and assumptions that explain how that figure was calculated. Availability and contract terms can vary by location and offer, so rely on the proposal and agreement you receive rather than assuming every Sunrun customer gets the same arrangement.
Start by checking that the proposal identifies:
Ask for the production estimate in writing, along with the assumptions behind it. These may include roof orientation, shading, weather data, system losses, and your past electricity use. A forecast is an estimate, not a promise that your utility bill will disappear. Your consumption can change, and utility rules and rates can affect the financial result.
Solar proposals can use different payment arrangements. A cash purchase or solar loan generally means you own the system, while a lease or power purchase agreement (PPA) generally means a provider owns it. The exact responsibilities and financial terms depend on the contract. A lower starting payment does not necessarily mean a lower total cost.
| Payment option | What to compare | Potential advantage | Key limitation or question |
|---|---|---|---|
| Cash purchase | Full installed price, included work, warranties, and expected production | You own the system without a solar loan payment | Can require substantial upfront funds; confirm who provides ongoing service |
| Solar loan | Loan amount, interest rate, term, fees, payment schedule, and total repayment | You can own the equipment while spreading payments over time | Financing costs can change the total cost; check whether the quoted payment assumes a later lump-sum payment |
| Lease | Payment schedule, any annual increase, contract term, service duties, and transfer terms | May avoid paying the full equipment cost upfront | You may not own the system; understand the obligations that remain if you sell the home |
| Power purchase agreement | Price per unit of energy, payment increases, estimated production, and charges for system output | Payments may be tied to the energy the system produces | Production and payment terms matter; you may still have a utility bill and may not own the equipment |
For a lease or PPA, don’t assume the provider’s ownership automatically means every repair or roof-related cost is covered. Read the agreement’s service, equipment, and damage provisions. For a loan, distinguish the loan payment from the electric bill and check whether the payment can change. Some financing proposals may show an assumed payment reduction after a tax-related or other lump-sum payment; if you see one, ask what happens if you do not make that payment.
Tax benefits depend on current law, your circumstances, and who owns the system. Don’t include a tax benefit in your savings calculation until you have confirmed that you may claim it and understand the requirements. If the system is leased or covered by a PPA, the contract’s ownership arrangement may affect who can claim any available benefit. For tax questions, consult a qualified tax professional rather than relying on a sales estimate.
Request a written cost summary for the entire contract, not only the first monthly payment. Include upfront charges, scheduled payment increases, loan fees, any required lump-sum payment, and any known end-of-term obligations. Then compare that with a realistic estimate of the electricity costs you may still pay. A solar system can reduce grid purchases without eliminating fixed utility charges or electricity use that exceeds production.
Check how the proposal estimates savings. Ask which utility rate and rate increases it assumes, how much of your historical electricity use the system is expected to serve, and whether the estimate includes the utility’s fixed charges. A projection based on rising electricity prices can look more attractive than one using stable rates, but future prices are uncertain. Treat projected savings as a scenario, not a guarantee, unless the contract explicitly provides a relevant guarantee and explains its remedy.
Compare proposals on the same basis. A smaller system may have a lower payment but leave more of your use to the utility; a larger system may cost more and may not be suitable under your utility’s compensation rules. Ask each provider to explain the system size and production estimate in relation to the same set of bills. If one quote includes a battery and another does not, separate the battery’s cost and expected use rather than comparing headline totals.
System size should follow your energy use and the roof’s practical limits, not a sales target. Review the proposed panel layout and ask whether it accounts for shading, roof planes, vents, and any planned roof work. If your roof may need replacement soon, discuss timing before installation. Removing and reinstalling equipment later can involve costs and coordination; the contract should make clear who is responsible and how that work is handled.
Ask what panels and inverters are included and what warranties apply to each component. The inverter converts the panels’ output into usable electricity, and its warranty may differ from the panel warranty. Also check the installation workmanship coverage, how to report a problem, and whether service is included for the full contract term or subject to conditions. Don’t treat a long equipment warranty as proof that every repair, roof issue, or service visit is covered.
Before approval, confirm who manages permits, inspections, and the utility connection process. Ask who will install the system, who your contact will be if work is delayed or incomplete, and what must happen before the system can operate. The written project schedule and responsibilities are more useful than a verbal estimate of how quickly the job will be finished.
A battery can store some solar electricity for later use and may provide backup during an outage if the system is designed and configured for that purpose. It adds cost, so the relevant question is whether its functions match your needs. A battery’s presence alone does not establish how much of your home it can power or for how long.
Ask Sunrun to specify the battery’s usable capacity, power output, what circuits or loads are supported during an outage, and how the system operates when the grid is down. Confirm whether solar panels can recharge it during an outage and what installation or equipment limitations apply. Get those details in writing rather than relying on a general promise of “backup.”
If your main goal is lower electricity costs, compare the battery’s added cost with the savings or bill-management benefits shown in the proposal. If your priority is outage backup, list the appliances you want to run and ask whether the proposed configuration can support them. A battery may suit a homeowner who values backup or has a rate structure that rewards shifting electricity use; it may be less compelling if those benefits are limited for the home.
The ownership arrangement affects more than tax treatment. It can determine who is responsible for equipment service, what happens at the end of the agreement, and what a buyer must do if you sell. Before signing, locate the contract terms covering transfer, assumption by a buyer, early termination, purchase options, and any fees. Do not assume a buyer can take over automatically or that you can end the agreement without cost.
Ask how a sale affects the project at each stage: before installation, after installation but before permission to operate, and during the contract term. If a buyer is unwilling or unable to assume an agreement, find out what options the contract provides. For a purchased system, clarify what equipment documents and warranties can be transferred. These details matter even if you expect to stay, because plans can change.
Also distinguish a production commitment from a general estimate. If the agreement includes a production guarantee, identify the covered period, how production is measured, what exclusions apply, and what compensation or remedy is available if output falls short. A guarantee is only as useful as its terms and remedy.
A Sunrun offer may suit a homeowner whose roof and electricity use support the proposed design and who values the particular financing or service arrangement offered. A lease or PPA may appeal to someone who prefers not to buy the equipment outright, provided the long-term payment and home-sale terms are acceptable. A purchase or loan may be more suitable for someone who wants system ownership and is comfortable taking responsibility for the associated financing or service arrangements.
Consider another proposal if the savings depend on assumptions you cannot verify, the design does not fit your usage, battery performance is described only in broad terms, or the contract’s transfer and payment provisions remain unclear. A local installer’s quote can provide a useful comparison, but compare equivalent equipment, production assumptions, warranties, and project responsibilities rather than choosing by company name or payment alone.
Not necessarily. You may continue to pay utility charges, and you may need grid electricity when your system is not producing enough for your home. Ask for an estimate that separates the solar payment from expected utility costs.
Compare the full payment schedule, contract term, system design, projected production, service coverage, and any costs that remain outside the payment. A lower starting payment can be offset by payment increases or a different system size.
Battery availability and configuration depend on the proposal and project. If one is included, confirm its cost, backup function, supported loads, and any limitations during an outage.
A home sale may require a buyer to assume an agreement, a loan to be paid off, or another contract option to be used. The answer depends on your documents, so review the transfer and sale provisions before signing.
No. A proposal’s savings estimate depends on assumptions about system production, household use, utility charges, and future electricity rates. Treat it as a forecast unless the signed agreement contains a specific guarantee and remedy that applies to the figures you are relying on.
Before signing with the Sunrun solar company, make sure the system design, total payment schedule, battery capabilities, service terms, and home-sale provisions work together for your circumstances. If the proposal only looks affordable when you focus on its monthly payment, pause and compare the complete commitment with your utility costs and another appropriately matched quote.
