California Solar Initiative - Thermal (CSI-Thermal)

California Public Utilities Commission

Available Solar & Renewable

About This Program

California Solar Initiative - Thermal (CSI-Thermal) is available to homeowners in Oakland, CA.

Incentive program for solar water heating and solar pool heating systems. Provides rebates for residential solar thermal installations to reduce natural gas or electric water heating costs. Higher incentives for income-qualified households.

Rebates range from $1,500-$5,000 based on system capacity and income

Official program page checked live on 2026-06-22.

Data last verified 2026-05-25. How we verify our data.

In Oakland, CA, you can combine this program with other local help to cut your cost:

Key Details

  • Rebates for solar water heating systems
  • Up to $5,000 for qualifying systems
  • Reduces water heating costs by 50-80%
  • Higher rebates for income-qualified households
  • Must use certified installers

How to Apply

Get free help applying Visit Official Program Page Track this program

(866) 434-7652

A grant-savvy contractor in Oakland, CA can handle the paperwork, inspections, and timelines so your funding releases on schedule. Getting matched is free.

You will likely need a contractor to apply

Projects like this almost always need a licensed contractor, and many grants ask for a written estimate as part of your application. Lining up a contractor in Oakland early keeps your application moving.

Get matched with a contractor

Each program sets its own contractor rules. Check the official program page for exact requirements.

Your application paperwork

Documents you will likely need

  • Proof you own and live in the home (deed, recent mortgage statement, or property tax bill).
  • A government-issued photo ID for every owner on title.
  • A written estimate from a licensed contractor for the work (many programs require this to apply).
  • A recent utility bill for the home (energy and weatherization programs use it to confirm service and usage).
  • Photos of the problem area or the work to be done.
  • The program's own application form, completed (use the official link or phone number on this page).
Download this checklist (PDF)

Requirements vary by program and locality. Confirm the exact rules on the official program page. We can help you prepare your paperwork, but you submit it yourself.

Deadline: Applications accepted while funds available

Questions about this program?

Ask us. It is free, and a real person answers within a business day.

Email us about this program

Frequently asked questions

How much can California Solar Initiative - Thermal (CSI-Thermal) provide in Oakland, CA?

Rebates up to $5,000.

Who qualifies for California Solar Initiative - Thermal (CSI-Thermal) in Oakland?

California Solar Initiative - Thermal (CSI-Thermal) is open to homeowners in Oakland, CA. It has no income limit.

How do I apply for California Solar Initiative - Thermal (CSI-Thermal) in Oakland, CA?

Apply directly with California Public Utilities Commission using the official program link on this page or call (866) 434-7652. There is no middleman and no fee.

Need a Contractor for This Grant?

Grant-approved contractors understand the documentation, inspections, and timelines, so your funding releases on schedule.

Get matched with a pro, free Browse Oakland, CA contractors

Find More Programs in Oakland, CA

This is just one of many grants, rebates, and free programs available. Stack them together to maximize your savings.

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