Scope: General buying framework; examples and official resources are US-focused. Local terms and rules vary. This guide has not been reviewed by a medical, financial or legal specialist.
Evaluate solar as a site and contract decision before treating it as a savings calculation. Ask how the proposal accounts for your roof, shade, electricity use and local utility arrangements. Compare ownership and finance terms separately from the equipment design. Require the assumptions behind projected savings and a written responsibility map for installation, maintenance and roof work.
Start with site suitability and local arrangements
The US Department of Energy’s homeowner guide explains that roof condition and shading can affect suitability, and that utility compensation arrangements vary. It also distinguishes purchase and lease considerations. These are starting questions, not a promise of savings. For your proposal, obtain a site-specific assessment and verify utility terms directly. This guide does not assert tax-credit eligibility, payback periods or future electricity prices.
Context source: US DOE: Homeowner’s guide to solar
Ask for an assumption sheet
Separate expected generation, household consumption, exported electricity and bill charges that remain. Ask the installer to show how the result changes if usage shifts or an assumption is less favourable. Include roof work, equipment replacement responsibilities, monitoring and the consequences of moving home. If finance is proposed, compare the total obligation and ownership terms with the system quote. Keep a battery proposal separate so you can understand whether its purpose is backup, bill management or another requirement.
What to compare
Roof and shading evidence
A remote estimate is a starting point. Establish what was physically assessed and who is responsible if the roof needs work before or after installation.
Ask: Which roof, structure and shade assumptions have been verified, and what remains provisional?
Utility and usage assumptions
Projected bill savings depend on how generated electricity is used and valued. Ask for the underlying local tariff and export assumptions.
Ask: Which current utility terms are used, and how would a change affect the calculation?
Ownership and maintenance
A system can come with long-lived obligations. Identify the owner, service responsibilities and what happens when property ownership changes.
Ask: Who owns the equipment, arranges repairs and handles removal or transfer when the home is sold?
Compare the approaches
An editorial decision framework, not a product ranking.
| Approach | When to consider it | Tradeoff to check |
|---|---|---|
| System purchase | A household evaluating direct ownership and associated responsibilities. | Requires capital or finance and a clear plan for maintenance and future roof work. |
| Lease or other third-party arrangement | A household considering an alternative ownership structure. | Review payment, transfer, service and end-of-term obligations rather than assuming they match ownership. |
Your decision checklist
Mark a question once you have a satisfactory answer. This is a preparation aid, not a suitability score.
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Questions that move the decision forward
Can I rely on an advertised payback period?
Ask for a calculation using your site and current terms, with each assumption shown. Compare less favourable scenarios and costs that may be excluded. An advertised period cannot establish your own result or guarantee future savings.
Do solar panels automatically provide power in an outage?
Ask the designer to specify the outage behaviour of the exact proposed system and any additional equipment needed. Have a qualified professional explain what loads can be supported and under what conditions; do not infer backup capability from panels alone.
Should I replace the roof before installing?
Obtain an assessment of the roof and discuss the removal and reinstallation implications with qualified contractors. The right sequence depends on the building and proposed system. Put responsibilities and costs in writing before committing to installation.
Sources and boundaries
Sources support the factual context indicated below. The checklist, scenarios and comparison method are Atlas editorial suggestions. A source link does not imply endorsement or product testing.
- US DOE: Homeowner’s guide to solarRetrieved 2026-10-25 · Roof suitability, variable utility arrangements and ownership considerations; no financial projections or incentive promises.