California Solar Initiative (CSI) - Thermal Program

California Public Utilities Commission / PG&E

Available Solar & Renewable

About This Program

Provides incentives for solar water heating systems installed on single-family homes in PG&E territory. Rebate amounts based on system size and estimated energy savings. Higher incentives for low-income households.

Typical rebate for residential solar water heating system

Official source site checked live on 2026-06-17.

Data last verified 2026-06-09. How we verify our data.

Key Details

  • Rebates up to $5,000 for solar water heaters
  • Available to PG&E residential customers
  • Higher rebates for low-income households
  • Must use certified contractor and equipment
  • Reduces water heating costs by 50-80%

How to Apply

Get free help applying Visit Official Program Page Track this program

(877) 427-6527

A grant-savvy contractor in Redding, 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 Redding 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: Subject to program capacity

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