Switch to Solar in California: The 2026 Complete Guide

Switching to solar in California in 2026 is a different process than it was three years ago. The NEM 3.0 tariff changed the math. Battery storage is now essentially mandatory for solid economics. The federal tax credit situation shifted. And the installer landscape has consolidated — Freedom Forever filed Chapter 11 on April 15, 2026 and the court converted the case to a Chapter 7 liquidation on August 7, 2026, and Sunnova went through Chapter 11 in June 2025. This guide walks through the complete process: deciding if solar is right for you, comparing installers and financing, getting through installation and interconnection, and what to expect on your first few utility bills.

For what home solar costs and whether it pays in California, see the solar panels in California guide.

Step 1 — Decide If You Should Switch

Before comparing installers, confirm solar actually makes sense for your situation. The core test: is your monthly electric bill above $200? Do you have a south or west-facing roof with reasonable sun exposure? Are you staying in the home for at least 7 years (cash/loan) or willing to transfer a lease/PPA to a future buyer?

If yes to all three, solar probably works for you. If your bill is under $150 or your roof is heavily shaded, the math is harder — see our full is-it-worth-it analysis.

Step 2 — Pick Your Financing Path

California has four common ways to pay for solar:

• •Cash: pay the full price upfront and own the system. There is no federal residential credit on a system installed in 2026 (IRC § 25D ended for expenditures after December 31, 2025).
• •Solar loan: often no down payment, own the system, and repay over the loan term. Watch for dealer fees.
• •Solar lease: often no down payment, the provider owns the system, set monthly payment. No tax credit for you.
• •PPA: often no down payment, the provider owns the system, per-kWh price. California Rate Relief is a referral service, not a PPA provider.

The best fit depends on your credit, savings, and how long you'll stay in the house. Our cash vs loan vs lease vs PPA breakdown runs the numbers for each.

Step 3 — Get Multiple Quotes

Don't sign with the first installer. Get at least 2-3 quotes and compare system size, equipment (panel brand, inverter type, battery capacity), total cost, monthly payment (for financed/lease/PPA), and warranty length. Ask whether the contract includes a production guarantee and what share of modeled output it covers.

Active California installers in 2026 include Sunrun, Tesla Solar, SunPower, Momentum, Semper Solaris, Solar Optimum, and several regional players. See our full Best Solar Companies in California hub.

Avoid companies in bankruptcy: Freedom Forever filed Chapter 11 in April 2026 and was converted to Chapter 7 liquidation in summer 2026 — it is no longer operating. Sunnova (Chapter 11 June 2025) has been sold and its legacy portfolio is administered by SunStrong; it is not originating new contracts. Do not sign with either.

Both case records are public: Freedom Forever LLC, No. 26-10522 (Bankr. D. Del.), filed April 15, 2026, and Sunnova Energy International Inc., No. 25-90160 (Bankr. S.D. Tex.), filed June 8, 2025 (CourtListener dockets, checked September 24, 2026).

Step 4 — Sign, Install, Interconnect

After you sign the contract, the typical timeline is: 1-3 weeks for site survey and engineering, 2-6 weeks for permit approval through your local city or county, 1-2 days for physical installation on the roof, 2-4 weeks for utility interconnection ("Permission to Operate" or PTO). Total contract-to-PTO in California is typically 2-4 months.

You can check the utility step. At PG&E, SCE and SDG&E, the median residential solar system approved in 2025 was approved 25 days after the utility received its interconnection application (California Distributed Generation Statistics, CPUC interconnection data through May 31, 2026, downloaded September 24, 2026). The installer files that application, so ask when it will go in.

You can't turn the system on until you have PTO. Flipping the switch early triggers an unpermitted-generation fine from the utility and can cascade into permit issues.

Step 5 — First Year on Solar

Your first utility bill after PTO will look different. You'll see your daily production, your daily consumption, your net import or export, and a running credit/debit total. California uses an annual true-up — your bill settles once every 12 months based on your cumulative net position. Monthly bills through the year show either small charges (the fixed charge plus any grid consumption not offset by solar) or small credits. At true-up, you either pay the remaining annual difference or carry a credit forward.

Most California households see their total annual utility cost drop by $2,000-$4,000 after switching to solar + battery — on top of avoiding the rate inflation that would otherwise hit them 6-12% per year.

Common Mistakes to Avoid

Signing with the first installer who knocks on your door. Door-to-door solar sales is a high-pressure channel. Always compare at least 2-3 quotes.

Skipping the battery under NEM 3.0. A solar-only system under the current tariff has much weaker economics. If the installer isn't proposing a battery, ask why.

Not checking the installer's financial health. 25-year warranty from a company in bankruptcy is worth less than 25-year warranty from a solvent company. Check SEC EDGAR for public installers and recent news for private ones before signing.

Agreeing to a loan without seeing the cash price. Dealer fees on solar loans can add 15-25% to the financed amount. Always ask for both cash and financed pricing.