The most important number on a Brentwood home with solar is the interconnection date, and most buyers never ask for it. California's net billing fact sheet states that residential NEM 1.0 and NEM 2.0 customers transition to the newer Net Billing Tariff after fifteen years of grid interconnection. That clock started before you did.
Here is what to establish about a solar system before you write an offer, and why the answer is rarely on the listing.
Who actually owns the panels?
This decides everything else, and there are four common answers.
Owned outright. The system conveys with the house. Simplest case.
Financed with a loan. The balance is usually paid off at closing, but a lender may have filed a fixture filing against the property. That has to be identified and cleared through escrow, not discovered afterward.
Leased. You are taking over someone else's monthly obligation. The provider generally has to approve you, and their credit criteria are not your mortgage lender's.
Power purchase agreement. You are not buying equipment, you are agreeing to buy the electricity it produces at a contracted rate for a contracted term. Read the escalator clause.
Ask which of the four applies, in writing, and get the actual agreement rather than a summary of it.
What does the interconnection date change?
The California Public Utilities Commission's net billing fact sheet states that residential NEM 1.0 and NEM 2.0 customers, other than low-income customers, transition to the Net Billing Tariff after fifteen years of being interconnected to the electric grid.
You will find widely repeated claims of a twenty-year window elsewhere. Sources disagree, and the disagreement is exactly why you should not rely on any of them, including this article. Get the interconnection date in writing, then confirm the remaining legacy period directly with the utility for that specific service address.
A system interconnected recently and one interconnected a decade ago are different propositions, even if the panels look identical from the street.
Does the legacy status pass to me when I buy?
Do not assume either way.
The CPUC fact sheet setting out the fifteen-year transition does not address what happens when a property is sold or a system changes hands. That silence is not permission and it is not a prohibition. It means the answer comes from the utility's own process rather than from the tariff summary.
Call the utility with the service address and ask three things: what tariff is this account currently on, what is the interconnection date on file, and what happens to that status when the account transfers to a new owner. Do it during your contingency period, and make a note of who told you.
What else should the inspection cover?
Solar changes what matters on a roof.
The roof under the array. If the roof needs replacing in five years, removing and reinstalling panels is a real cost that most buyers do not price in.
Permits and final sign-off. An unpermitted array is a problem in the same way an unpermitted room addition is a problem.
The inverter's age. Inverters have a shorter service life than panels, and replacement is the most common unexpected cost in the first decade of ownership.
Any battery. Ownership, warranty and transferability are separate questions from the panels.
If you're buying or selling in Brentwood
If you're buying: get the ownership structure, the full agreement, the interconnection date and the permit records before contingencies expire. If it is leased or on a PPA, start the provider's transfer approval early, because it runs on their timeline and can hold up a closing. Confirm the tariff position with the utility yourself rather than accepting a seller's description.
If you're selling: gather the agreement, the permits, the final inspection and the interconnection date before you list. If the system is leased or financed, contact the provider about their transfer process now, since that is the item most likely to cost you days in escrow. A documented system is an asset; an undocumented one becomes a negotiating point.
Frequently asked questions about buying a home with solar
How long does California's legacy net metering last?
The CPUC's net billing fact sheet states that residential NEM 1.0 and NEM 2.0 customers, except low-income customers, transition to the Net Billing Tariff after fifteen years of being interconnected to the grid. Other sources cite twenty years. Because they conflict, confirm the position for the specific service address with the utility.
What is the interconnection date and where do I find it?
It is the date the system was connected to the grid, and it is what the fifteen-year clock is measured from. Ask the seller for documentation and confirm it with the utility rather than relying on the installation date or the permit date, which can differ.
Does solar transfer automatically when I buy the house?
Not necessarily. An owned system conveys with the property, but a lease or power purchase agreement requires the provider to approve you and formally transfer the contract, and a financed system may carry a fixture filing that must be cleared through escrow.
Can a solar lease affect my mortgage?
It can. Lenders treat lease and PPA obligations differently than owned systems, and a fixture filing recorded against the property can affect title. Raise it with your loan officer and your escrow officer early rather than late.
Who pays to remove panels for a roof replacement?
The homeowner, in almost every arrangement. If the roof is near the end of its life, price removal and reinstallation into your offer rather than treating the array as a pure benefit.
The Bottom Line on Buying a Brentwood Home With Solar
Two questions decide almost everything: who owns the system, and when was it interconnected. Both have documentary answers, and neither appears in a listing.
Get the agreement and the interconnection date in writing, then confirm the tariff position and the transfer process with the utility yourself. Published summaries disagree with each other, which is precisely why the only answer worth having is the one attached to that service address.
Looking at a Brentwood home with solar?
Send me the address and I will tell you what questions that specific system raises before you are in contract.
See homes for sale in Brentwood
Across 460+ East Bay closings over twenty years, the solar agreement is the document sellers are least likely to be able to find when I ask for it.
Selling a home with solar? Start with a valuation, or call or text 925-250-9611.
Sources
California Public Utilities Commission, Net Billing Tariff fact sheet for the fifteen-year transition of residential NEM 1.0 and NEM 2.0 customers and the use of the grid interconnection date as the measuring point. The same document does not address transfer on sale, which is why this article directs readers to the utility for that question. CPUC, Net Energy Metering and Net Billing for programme background.
Tariffs and transfer procedures change. Confirm the current position for a specific service address with the utility.
Jaz Chand, Broker Associate | Homes With Accent
The Jaz Team at Merrill Signature Properties | DRE #01751823
Phone/Text: 925-250-9611 | Jaz@HomesWithAccent.com
General information only, not legal, tax, financial or energy advice. Solar agreements, tariffs and utility procedures vary and change. Review all system documents and confirm tariff status with the utility during your contingency period, and consult your own professionals.