California Solar Calculator 2026

Why California Solar Changed Dramatically in 2023 (NEM 3.0)

If you've researched solar in California before 2023, you need to forget what you knew. The Net Billing Tariff (NEM 3.0), implemented on April 15, 2023, fundamentally changed the economics of solar in the Golden State. The old model – where you could size a system to cover 100% of your usage and get full retail credit for exports – is gone.

Under NEM 3.0, the export rate (what the utility pays you for sending solar back to the grid) dropped from ~$0.30/kWh to $0.05-0.08/kWh. That's a 75-85% reduction. For a typical PG&E customer, this means a system that used to pay for itself in 5 years now takes 7-9 years.

Understanding Your California Utility's NEM 3.0 Rates

California has three major investor-owned utilities (IOUs), and each has slightly different NEM 3.0 export rates. Here's what you need to know:

Utility	Average Import Rate	NEM 3.0 Export Rate	Best Strategy
PG&E	$0.38/kWh	$0.06/kWh	Battery essential (large evening peak)
SCE	$0.32/kWh	$0.05/kWh	Time-of-Use (TOU) optimization
SDG&E	$0.42/kWh	$0.08/kWh	Highest savings potential, but highest fixed charges

Pro Tip: If you're with PG&E and have an EV, consider the EV2-A rate schedule. It offers lower off-peak rates ($0.22/kWh at night) if you charge your car between 12am-3pm. Combined with solar, this can save an additional $500-800/year compared to the standard E-TOU-D rate.

The SGIP Incentive: Making Batteries Affordable in California

Here's the good news: California's Self-Generation Incentive Program (SGIP) provides upfront rebates for battery storage. In 2026, the standard SGIP rate is $250/kWh, but if you qualify as a low-income customer or live in a High Fire Threat District (HFTD), you can get $600-1,000/kWh.

For a typical 10 kWh battery (enough to power essential loads from 9pm to 6am), here's what you'll pay after SGIP:

• Standard customer: $10,000 battery - $2,500 SGIP = $7,500 net cost
• Low-income/HFTD customer: $10,000 battery - $6,000-10,000 SGIP = $0-4,000 net cost

SDG&E customers in HFTD areas (like Ramona, Alpine, or Julian) can often get a battery for free through SGIP + local programs like the San Diego Self-Generation Program.

California Solar Costs in 2026: What to Expect

Solar panel costs in California are slightly higher than the national average due to permitting complexities and Title 24 building code requirements (which, as of 2023, require new homes to be "solar-ready" or include solar).

Here's a realistic cost breakdown for a 6 kW system (typical for a 1,500 sq ft home in California):

Component	Economy	Standard	Premium
Panels (Tier 1/2/3)	$8,000	$10,500	$14,000
Inverter (String/Micro)	$1,500	$2,500	$3,500
Permitting & Labor	$3,000	$4,000	$5,000
Total Before Incentives	$12,500	$17,000	$22,500
After Federal Tax Credit (30%)	$8,750	$11,900	$15,750

Important: These prices assume you use a local California installer. National installers (Sunrun, Vivint) typically charge 20-30% more for the same equipment. Get at least 3 quotes from local installers on EnergySage or local platforms.

NEM 2.0 vs NEM 3.0: Is It Worth Switching?

If you got Permission to Operate (PTO) before April 15, 2023, you're under NEM 2.0 and can stay for 20 years. If you're under NEM 2.0, do not add a battery without careful analysis. Under NEM 2.0, the export rate is high enough that a battery often doesn't pay for itself (unless you have frequent outages).

However, if you're considering adding more panels to a NEM 2.0 system, be careful: in most California utilities, adding more than 10% capacity triggers a switch to NEM 3.0 for the entire system. Talk to your installer before expanding.

California Solar Incentives Beyond the Federal Tax Credit

California has some of the most generous solar incentives in the country, but they're not all advertised. Here's what you might be missing:

1. Active Solar Energy Tax Credit (California) – While the federal tax credit is 30%, California also allows you to claim the Active Solar Energy System Credit on your state taxes, worth up to $1,000 (based on 7.5% of system cost).
2. Property Tax Exemption – Adding solar usually increases your home value by $15,000-25,000. In most states, this means higher property taxes. In California, Board of Equalization Rule 190 exempts solar from property tax assessment.
3. GoSolarCalifornia Rebates – Low-income customers in disadvantaged communities (DACs) can get $3,000-5,000 through the DAC-SASH program. Check if your zip code qualifies.
4. Local Utility Rebates – Some municipal utilities (like LADWP, SMUD, or Burbank Water and Power) offer additional $500-2,000 rebates for their customers. These are separate from IOU programs.

Common Mistakes California Homeowners Make with Solar

Having helped many California homeowners navigate solar since NEM 3.0, here are the top mistakes I see:

1. Sizing the system too large. Under NEM 3.0, a 100% offset system wastes money. Aim for 80-90% and use a battery for the rest.
2. Not getting a battery. Under NEM 2.0, batteries were optional. Under NEM 3.0, a battery is essential to capture the 4-6pm "duck curve" peak when export rates are low but import rates are high.
3. Leasing instead of buying. With NEM 3.0's longer payback, leases (which promise "$0 down, $100/month") often cost more in the long run. Run the numbers with our Grid vs Solar Calculator.
4. Ignoring roof condition. Solar panels last 25+ years. If your roof is 15+ years old, replace it before (or with) solar. Removing and reinstalling panels for a roof replacement costs $2,000-3,000.

Frequently Asked Questions About California Solar