Solar Guides · California
California solar, explained in plain English.
Honest, up-to-date guides on NEM 2.0 grandfathering, batteries, and buying a home with solar in California — written by a licensed general contractor (CSLB #983330), not a call center.
NEM 2.0 Grandfathering Explained
How California NEM 2.0 grandfathering works, how long it lasts, and what actually keeps — or ends — it. Start here.
Read guideAdding a Battery to a NEM 2.0 System
Whether adding battery storage preserves your grandfathering (it usually does).
Read guideBuying a Home with NEM 2.0 Solar
Does grandfathering transfer when the home is sold, and how to verify it.
Read guideAB 942 & Solar Grandfathering
What AB 942 would have changed, its status in 2026, and the real deadline that matters.
Read guideHow to Check Your NEM Status
Step-by-step to confirm whether a home is on NEM 2.0 or 3.0 using the utility bill.
Read guideHow Solar + Battery Savings Work
Self-use, 4-9 pm shifting, and demand charges, with an interactive day diagram.
Read guidePlug-In Solar in California
The Plug and Play Solar Act takes effect Jan 1, 2027. The 1,200-watt rule, utility notification, realistic savings, and seven things to check before buying a kit.
Read guideSolar Insure SI-Commercial Warranty
What the third-party warranty covers on eligible purchased commercial systems, what it excludes, and how a claim works.
Read guideNEM 2.0 Grandfathering Calculator
Enter your Permission to Operate (PTO) date and instantly see when your NEM 2.0 grandfathering expires and how many years are left.
Battery Charge Calculator
Pick a battery and see how many solar panels it takes to refill it, and whether a system sized to your bill can do it on an average or a winter day.
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