Reviewed · Independent information guide
Solar energy: costs and planning
Start with your electricity use, site conditions and utility rules. A sales projection should show how those inputs produce the expected result.
Questions before requesting proposals
- What condition is the roof in, and how much shading does it receive?
- How much electricity does the home use, and will that change?
- What production does the design estimate, and what assumptions support it?
- Which utility tariff and export-credit rules apply?
- What are the cash price, financed total, warranty and maintenance obligations?
- If backup power is part of the proposal, what equipment and loads does it cover?
The Department of Energy's homeowner guide explains the main solar planning questions. [1]
Check incentives using current rules
The IRS states that the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025. Do not use an old “30% federal tax credit” claim as the basis for a new 2026 residential installation. Prior-year carryforwards and other programs are separate questions. [2]
Check any utility, state or local incentive directly with the program administrator. Use current tax guidance for your own circumstances rather than assuming every project or ownership arrangement receives the same benefit.
Compare the proposal with your actual utility costs
Separate the value of electricity used in the home from electricity exported to the grid. Ask which bill charges remain and how financing or a lease changes total costs. Review the proposal with and without any incentive that has not been confirmed.
Renewable plans are a different decision
A renewable electricity offer is not the same as owning a solar system. If your goal is to support renewable generation without an installation, read the supplier's environmental disclosures and certificate claims. Understand renewable electricity claims.
This guide does not sell equipment, provide installation quotes or promise a payback period.
Sources
Review date records an editorial check. Confirm current terms and eligibility at the source.