State and Utility Solar Incentives: Net Metering, Rebates and Exemptions

State and utility incentives for home solar fall into a few types: rules that decide how you are credited for exported power (net metering or net billing), upfront rebates, state tax credits or exemptions, and performance payments such as renewable energy certificates. Which ones exist depends entirely on your state, your utility and sometimes your city, so the right approach is to look up your exact address and confirm each program directly. This guide explains each type, how they change the economics and how to verify what is on offer.

Examples are illustrative. Programs open, close and change their rates regularly, and many have limited funding.

The five main types of incentives

1. Net metering and net billing

These rules determine what your utility pays you for electricity your system sends to the grid.

• Net metering credits exports at or close to the retail rate, often applied as a bill credit that rolls over month to month.
• Net billing credits exports at a lower rate, sometimes an avoided-cost rate or a time-varying rate. California's shift from net metering to a net billing program for new customers in 2023 is a widely cited example.
• Buy-all, sell-all arrangements measure all production separately and pay a set rate.

Because these rules can change the value of every exported kWh, they are often more important to payback than an upfront rebate. Ask whether your system will be grandfathered into the current program for a fixed period and what the rules say about future changes.

2. Upfront rebates

Some utilities, municipalities or state agencies pay a rebate per watt or a flat amount for installing solar or storage. These are typically first-come, first-served and can run out of money. Ask whether the rebate is paid to you or to the installer and how it appears on the invoice.

3. State tax credits and deductions

A number of states offer income tax credits or deductions for residential solar. Rules differ in how much can be claimed, whether unused credit carries forward and whether leased systems qualify. Ask your state revenue department or a tax professional.

4. Property and sales tax treatment

Many states exempt the added home value from solar from property tax assessments, and some exempt equipment from sales tax. Without these exemptions, solar can add to your annual tax bill or your upfront cost.

5. Performance payments and certificates

In some markets, solar owners can earn solar renewable energy certificates (SRECs) or similar credits for each megawatt-hour produced, which they can sell. The value fluctuates with market conditions and state policy, so avoid counting on a fixed income stream unless it is a contracted rate.

How to find your programs

1. Use the DSIRE database and search by state, then filter for residential solar.
2. Visit your utility's website and search for solar, net metering, interconnection and rebate pages.
3. Check your state energy office or public utilities commission.
4. Ask your city or county about local rebates, permit fee waivers or expedited review.
5. Ask installers which programs they have processed in your area recently.

Write down each program's name, administrator, amount, deadline and eligibility conditions, and keep a screenshot or PDF of the rules at the time you sign.

Worked example: how export rules change payback

All numbers are illustrative. An 8 kW system produces 10,800 kWh a year. You use 60% on site, which avoids retail electricity at 25 cents per kWh. Self-consumption value: 6,480 x 0.25 = $1,620.

• Under full retail net metering, exports of 4,320 kWh are credited at 25 cents: 4,320 x 0.25 = $1,080. Total = $2,700 a year.
• Under net billing at 7 cents, exports are worth 4,320 x 0.07 = $302.40. Total = $1,922.40 a year.

The difference is $777.60 every year, about $19,440 over 25 years in constant dollars. That swing is larger than many rebates, which is why you must understand the export rules before signing. Enter your own numbers in the payback calculator.

Interconnection and fees

Utilities require an interconnection application and sometimes charge a fee. Some also impose fixed charges or rate changes for solar customers. Read your utility's rate plan for solar customers, including any minimum bill, demand charge or time-of-use schedule, since they shape the value of your production.

Rules to watch

• Grandfathering. How long will your current export rate last after installation?
• System size caps. Many programs limit system size to a percentage of your historical usage.
• Rollover and true-up. Do excess credits expire at year end, and at what rate?
• Eligibility. Rebates may exclude leased systems or require specific contractors or equipment lists.
• Stacking. Some programs cannot be combined; check before assuming you will receive both.

Mistakes to avoid

1. Believing a salesperson's list of incentives without confirming each with the administrator.
2. Missing a reservation or application deadline that must be filed before installation.
3. Ignoring utility rate plan changes that come with solar.
4. Not keeping documentation for rebate or tax claims.
5. Counting on a variable payment, such as SRECs, as guaranteed income.

Documents to prepare

• Recent utility bills showing usage and rate plan
• Proof of ownership of the property
• The signed contract and equipment spec sheets
• Interconnection approval and permission-to-operate letter
• Any rebate application confirmation numbers

Frequently asked questions

What is the difference between net metering and net billing?

Net metering credits exports at or near the retail rate, while net billing credits them at a different, often lower, rate. The difference can change payback by years.

Can I get a rebate and a tax credit together?

Sometimes, but a rebate may reduce the cost basis for tax purposes, and some programs forbid stacking. Ask the administrator and a tax professional.

Do renters or condo owners have options?

Some states have community solar programs that let you subscribe to a share of a shared project. Check DSIRE and your utility.

Are incentives available for batteries?

In some states and utilities, yes. See our guide on battery storage cost.

Sources

• DSIRE, Database of State Incentives for Renewables and Efficiency — searchable by state
• U.S. Department of Energy — homeowner solar information and community solar resources
• U.S. Energy Information Administration — state electricity prices and net metering data