Last updated: October 10, 2026
Who is writing this. I'm Isaac Roth, an independent solar
consultant in Oakland. I don't work for an installer and I'm not paid by one
to send you their way, so this guide is about how to choose, not a ranking
with a winner already picked.
Why "best solar company in Oakland" is the wrong question
Search for it and you'll find a lot of ranked lists. A list can't see your
roof. The company that is right for a simple, south-facing ranch in San
Leandro may be wrong for a three-story Victorian in the Oakland flats with a
100-amp panel and a lot of shade. Fit matters more than rank.
The kinds of solar companies you'll meet
- National installers. Big marketing budgets, standard
packages, and often a sales team separate from the crews. Pricing can be
competitive on simple roofs, and service after the sale depends on how they
staff the Bay Area.
- Local installers. Smaller, usually with their own crews
and a local reputation to protect. Quality varies a lot in both directions,
so check recent work in your neighborhood.
- Door-to-door and lead-generation sellers. Often the
company that knocks isn't the company that installs. Ask who will actually be
on your roof.
- Independent consultants. That's me. We don't install; we
help you understand the options and compare quotes from installers.
How to compare two quotes
The goal is to compare like for like. Before you look at the price, make sure
both quotes describe the same job:
- The same system size in kilowatts, designed to cover the
same share of your usage.
- Specific equipment: the manufacturer and model of the
panels, inverter and battery, not "premium panels".
- The total installed price in dollars, plus the cost per
watt. A monthly payment alone hides both. I break this down in
what solar costs in Oakland.
- Warranties listed separately: panels, inverter, battery
and workmanship are different promises from different parties, for different
lengths of time.
- Purchase, loan or lease. The same panels can cost very
different amounts over their life depending on how you pay. See
lease, loan or buy.
Questions to ask every company
- Who will install this: your own crew, or a subcontractor?
- Who handles the permit and the PG&E application, and what happens if it
stalls? (How long it
takes.)
- Is my main electrical panel good enough, or does it need work first?
Federal Pacific and Zinsco panels have to be replaced before solar.
- Does the savings estimate account for NEM 3 and for the 2026 end of the
homeowner federal tax credit? (The
NEM 3 guide.)
- Do I need a battery, and why? (Do I
need a battery?)
- Who do I call, and how fast, when something needs service in year five?
Red flags
- Pressure to sign the same day, or a price that's "only good tonight".
- A proposal that still shows the 30% federal credit for a system you buy
in 2026.
- A "$0 down" offer where you can't see the price without the financing
fees.
- A vague equipment list, or no production estimate with the shade
assumptions behind it.
- Reluctance to put the warranty terms in writing.
Oakland-specific things worth knowing
- Utility. Most of Oakland is served by PG&E, so NEM 3
rules apply. Alameda is different; it's served by Alameda Municipal Power
(solar in Alameda).
- Old housing stock. Many Oakland homes have older panels
and complicated roofs, which is where quotes tend to diverge.
- Hills versus flats. Shade, access and roof pitch change
the design and the price. More in solar in
Oakland.
Where I fit in
I look at your roof, your panel and your bill, then review the quotes you've
collected or help you get comparable ones from trusted local installers. If
the fair quote is from someone I've never worked with, I'll say so.