SunPower – Powering a Brighter Future | SunPower®
With decades of experience and know-how, we set the standard for solar power in the U.S. Our experience in renewable energy delivers superior results that stand the test of time.
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EV Charging Station Tax Credit: Form 8911 Filing Made Easy
Get step-by-step guidance on claiming the EV charging station tax credit with Form 8911, including qualifying equipment, installation, and rebate stacking tips.
How The Federal Solar Tax Credit Works In 2026
Learn how the Federal Solar Tax Credit works for homeowners and businesses. Discover the tax credit adders, direct pay option, and transferability rules.
California City and County Sales and Use Tax Rates
For a list of your current and historical rates, go to the California City & County Sales & Use Tax Rates webpage. Look up the current sales and use tax rate by address. Please note,
2026 Guide to Balcony & Plug-In Solar | Solar
Can you really plug a solar panel into a wall outlet? Discover how balcony solar works, state-by-state laws, and how much you can save.
Product Look Up Tool (DOE)
Contractors and plumbers can use this tool to determine if an appliance meets certain eligibility criteria for the Federal Energy Efficient Home Improvement tax credit. The tool produces a results page that
California City & County Sales & Use Tax Rate Information
The following files are provided to download tax rates for California Cities and Counties (all have 3 digits after the decimal). Please Note: Some communities located within a county or a city may not be listed.
Costs Associated With Non-Residential Electric Vehicle Supply
This report provides information about the costs associated with purchasing, installing, and owning non-residential EVSE. Cost information is compiled from various studies around the country, as well as
Per diem rates
Per diem rates We establish the per diem rates that federal agencies use to reimburse their employees for lodging and meals and incidental expenses incurred while on official travel within