California Solar Guide 2026

Here's my honest take: California is still one of the best states for solar, but NEM 3.0 changed the math. I've talked to dozens of homeowners who got wildly different quotes — some making sense, some that were borderline predatory. This guide exists because I got tired of watching people overpay or walk away from genuinely good deals because the industry makes everything so confusing.

If you're paying PG&E, SCE, or SDG&E rates (and wincing every month like I did), solar almost certainly makes financial sense. The question is: how do you avoid the landmines? Keep reading.

Look, I'll be blunt: NEM 3.0 was a gut punch to solar economics in California. The utilities lobbied hard for it, and they won. But here's the thing — solar still makes sense. You just need to design your system differently than you would have two years ago.

The old days (NEM 2.0 — existing customers are grandfathered)

• Export credit: ~$0.28–$0.34/kWh — you'd get paid nearly full retail for excess power
• The grid worked like a giant free battery: overproduce during the day, use credits at night
• Battery storage was nice to have, not essential
• Payback periods: 5–7 years was common in San Diego, LA, and the Central Valley

The new reality (NEM 3.0 — everyone applying from April 2023 onward)

• Export credit: ~$0.04–$0.08/kWh — that's a 75% haircut
• Sending power to the grid is now worth almost nothing financially
• Battery storage is essentially mandatory to make the numbers work well
• Payback periods extended by 2–4 years compared to NEM 2.0 projections
• Silver lining: NEM 2.0 customers keep their rates for 20 years from interconnection

What I actually recommend now

The strategy has flipped. Under NEM 2.0, you'd size your system as big as possible to maximize exports. Under NEM 3.0, you want to size for self-consumption — meaning you use as much of your solar power directly as possible, storing the rest in a battery for evening use.

My practical advice: A 6–8 kW system paired with a 13.5 kWh battery (like a Tesla Powerwall 3 or Enphase IQ 5P) is the sweet spot for most California households. You'll still hit a 7–9 year payback, still come out way ahead over 25 years, and you'll have backup power during PG&E's increasingly common outages. Win-win.