The Short Answer

For most Northern California homeowners, solar is still a good investment - but not the slam dunk it was five years ago. NEM 3.0 changed the economics significantly. The math depends on your specific situation: how much electricity you use, your roof orientation, your current rate plan, and whether you add battery storage.

Here is the honest breakdown, with real numbers, so you can decide for yourself.

What a Residential Solar System Costs in 2026

A typical NorCal residential system (6-10 kW) runs between $15,000 and $25,000 before incentives. That is the gross cost - panels, inverter, mounting hardware, permitting, labor, and interconnection.

Several factors affect where you land in that range:

  • System size: A 6 kW system for a small home costs less than a 10 kW system for a larger one
  • Panel quality: Premium panels (REC, SunPower) cost more per watt but produce more over their lifetime
  • Roof complexity: Multiple roof planes, steep pitch, or tile roofing adds installation cost
  • Installer: National companies generally charge more than quality local installers. Get at least three quotes

The Federal Tax Credit (30%)

The Investment Tax Credit (ITC) gives you a 30% credit on your federal taxes for the total cost of your solar system. This is a dollar-for-dollar credit, not a deduction. On a $20,000 system, that is $6,000 back on your taxes.

Important details people miss:

  • You need enough federal tax liability to use the credit. If you owe less than $6,000 in federal taxes, you can roll the remainder to the next year
  • The 30% rate is locked through 2032, then drops to 26% in 2033 and 22% in 2034
  • Battery storage qualifies for the same 30% credit even if added later

After the tax credit, that $20,000 system effectively costs $14,000. That is the number to use for your payback calculation.

NEM 3.0: The Game Changer

Net Energy Metering 3.0 took effect in April 2023 and fundamentally changed solar economics in California. Under the old NEM 2.0, PG&E credited you roughly retail rate for excess solar energy you sent to the grid. Under NEM 3.0, those credits dropped by about 75%.

What this means practically: your solar panels still save you money by offsetting energy you would have bought from PG&E. But the value of excess energy you export to the grid during midday is much lower than before.

This is why batteries have become so important. Instead of sending cheap excess energy to the grid, you store it and use it during expensive evening hours. More on that below.

Payback Period: The Real Numbers

Under NEM 2.0, payback periods were typically 5-7 years. Under NEM 3.0, expect 7-10 years for a solar-only system, or 6-8 years for solar plus battery (because the battery captures more of the value).

Here is a simplified example:

  • System cost after tax credit: $14,000
  • Annual electricity savings: $1,800-$2,200
  • Payback period: roughly 7-8 years
  • Panel warranty: 25 years
  • Total savings over 25 years: $30,000-$45,000 (depending on rate increases)

That last point matters a lot. PG&E rates have increased roughly 8-10% annually over the past several years. Solar locks in your energy cost. The longer you own the system, the more valuable it becomes as utility rates climb.

PG&E Rate Trends: The Hidden Argument for Solar

PG&E residential rates crossed $0.40/kWh for many customers in 2024 and continue climbing. The utility has requested additional rate increases through 2026. Some customers on tiered plans are paying $0.50+/kWh for upper-tier usage.

If rates continue increasing at even 5% annually (conservative given recent history), the gap between what you would have paid PG&E and what your solar system costs you widens every year. This accelerating savings is what makes the long-term investment case compelling even with NEM 3.0.

When Solar Does NOT Make Sense

Honesty matters here. Solar is not right for everyone:

  • Heavy shading: If your roof gets less than 4-5 hours of direct sun, production will be too low for a reasonable payback
  • Roof replacement needed: If your roof needs replacing in the next 5-7 years, do the roof first. Removing and reinstalling panels is expensive
  • Low electricity usage: If your PG&E bill is under $80/month, the savings may not justify the investment
  • Planning to move soon: Solar adds home value, but if you are selling within 2-3 years, you likely will not recoup the investment
  • Poor financing terms: Avoid solar leases and PPAs with escalator clauses. If you cannot buy or get a reasonable loan (under 6%), the financing can eat your savings

The Bottom Line

For a NorCal homeowner with good sun, reasonable electricity usage ($150+/month), a sound roof, and plans to stay put for 7+ years, solar remains a strong investment. It is not the no-brainer it was under NEM 2.0, but with PG&E rates climbing relentlessly and the 30% tax credit available through 2032, the math still works.

Add a battery to the equation and the economics improve further - especially if you are on a time-of-use rate plan or live in a PSPS-prone area. More on that in our battery storage guide.

Get multiple quotes. Run your specific numbers. And talk to neighbors who have gone solar - their real-world experience is worth more than any sales pitch.