Everything you need to know before going solar — how it works, what to expect during installation, available incentives, and the questions to ask every installer before you sign anything.
Solar energy is simpler than it sounds. Here's a plain-English breakdown of the technology and what it means for your property.
Solar panels are made of photovoltaic cells — usually silicon — that convert sunlight directly into direct current (DC) electricity. The more sunlight your roof receives, the more electricity your panels generate.
Your home or business runs on alternating current (AC), so a device called an inverter converts the DC electricity from your panels into usable AC power. Modern inverters are highly efficient and require virtually no maintenance.
When your panels produce more electricity than you're currently using, the excess goes back to the utility grid. In most states, your utility company credits you for that electricity — a process called net metering.
This means your meter runs backwards when you're overproducing, and you draw from the grid at night or on cloudy days. Over the course of a year, many solar homes produce roughly as much as they consume — resulting in dramatically reduced or even zero electricity bills.
Net metering laws vary by state. Your installer can explain exactly how your local utility handles credits and billing.
Solar panels generate electricity only when the sun is shining. A battery storage system — like the Tesla Powerwall or Enphase IQ Battery — stores excess energy for use at night or during grid outages.
Battery storage adds cost but provides energy independence and backup power. It's increasingly common in areas with frequent outages, time-of-use utility rates, or limited net metering programs.
Not every property is an ideal solar candidate, but most are. Here's what your installer will evaluate during a site assessment.
Solar may not make economic sense if your roof has less than 10 years of remaining life, if significant tree cover creates persistent shading across most of the day, if your utility has unfavorable net metering or very low electricity rates, or if you plan to sell the property in the near term without factoring in solar's resale value impact.
None of these are automatic disqualifiers — your installer will help you assess the numbers. A reputable installer will tell you honestly if solar doesn't make sense for your property. If they can't produce a payback analysis that holds up, be skeptical.
From first contact with an installer to the day you flip the switch, here's a realistic timeline of what to expect.
Your installer visits the property, inspects the roof, evaluates shading, and reviews your electricity bills. They design a system sized to your actual usage and submit a detailed proposal with projected production and payback timeline.
You review and sign the installation contract. If you're financing, your loan or lease application is processed. You'll receive a final system design, equipment specifications, and a production estimate in writing.
Your installer submits permit applications to your local municipality and, for grid-tied systems, an interconnection application to your utility. Permitting timelines vary enormously by jurisdiction — from a few days to several weeks. This is often the longest step and is outside your installer's control.
Once permits are approved, installation is fast. Most residential systems are physically installed in one to three days. Your crew mounts the racking system, installs panels, runs wiring, and connects the inverter. Your home's main electrical panel may also be upgraded if needed.
A municipal inspector confirms the installation meets code. Your utility then approves interconnection and installs a new bi-directional meter if required. Once interconnection is approved, you receive Permission to Operate (PTO) — the official green light to turn your system on.
Your installer walks you through your monitoring app, explains your production dashboard, and activates the system. From this point, your panels are generating electricity and your meter is tracking the savings.
Solar incentives significantly reduce the cost of going solar. Here's a breakdown of the major programs available as of 2026.
The federal ITC allows you to deduct 30% of the total cost of your solar installation from your federal income taxes. Available for both residential and commercial properties. No cap on the amount. Must have sufficient tax liability to claim the full credit (unused credit can carry forward).
Many states offer additional tax credits, direct rebates, or property tax exemptions for solar installations. New York, Massachusetts, California, and several others have robust programs. Your installer will identify all state programs that apply to your installation address.
Net metering credits you for excess electricity sent to the grid. Some utilities also offer upfront rebates for solar installation. Net metering rates and structures vary widely by utility and state — your installer will explain exactly how your utility compensates you.
The USDA Rural Energy for America Program (REAP) provides grants covering up to 50% of eligible solar project costs for agricultural producers and rural small businesses. If your property qualifies, this can be stacked with the federal ITC for extraordinary savings.
Incentive programs change. The 30% ITC is currently authorized through 2032 but is subject to congressional action. State programs are added, modified, and discontinued regularly. Always verify current incentive availability with your installer and a tax professional — do not make financial decisions based solely on this guide.
You have four main ways to pay for solar. Each has different upfront costs, long-term savings, and implications for incentives.
Paying cash upfront gives you full ownership of the system and maximum savings over its lifetime. You claim 100% of available tax credits and rebates. Typical residential systems pay back in 6–10 years, then generate free electricity for 15–20+ more years. If you have the capital, this is the highest-return option.
Solar loans let you own the system and claim all incentives while spreading payments over time. Many solar loans are structured so that monthly payments are lower than your current electricity bill from day one. Loan terms typically range from 10–25 years. Compare rates carefully — solar loan interest rates vary significantly by lender.
You pay a fixed monthly amount to use the solar system, but the installer retains ownership. You don't qualify for tax credits. Leases eliminate maintenance concerns and typically require little or no money down. Savings are more modest than ownership. Carefully review lease terms — particularly escalator clauses that raise payments annually, and provisions that could complicate selling your home.
Under a PPA, an installer owns and operates the system on your property. You buy the electricity it produces at a set rate — typically below your utility rate. No upfront cost, no system ownership. PPAs are common for commercial and nonprofit properties where the tax credit can't be used internally. Like leases, review escalator clauses and transfer provisions carefully before signing.
A good installer welcomes these questions. A bad one will dodge them. Use this list before committing to any contract.
The terminology installers use — demystified.
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