Your future yearly electricity use
What your home uses today, plus the equipment you're adding.
Your future electric costs without solar
What solar and a battery could save
Based on a system sized to cover about 85% of your yearly use.
About batteries: a battery stores daytime solar for evening use and keeps key circuits running in an outage. Final solar and battery sizing needs a design for your specific home.
How these numbers are calculated
Your current yearly use is estimated by dividing your yearly electric bill by the average cost per kWh for your rate plan. Added equipment uses the typical yearly amounts below.
The 25-year cost grows your first-year bill by the rate increase you picked, every year. Solar savings assume the system covers 85% of your use, with panel output dropping 0.5% a year as they age.
Results don't include hourly solar exports, fixed monthly charges, equipment cost, battery operation, taxes or future changes to PG&E rules.
About this planning tool
Is this a solar proposal?
No. This is an educational planning calculator. It's not a formal solar proposal, engineering design, utility bill guarantee or financial promise.
Are the savings guaranteed?
No. Actual savings depend on your electricity use, PG&E rate plan, taxes, fees, solar production, roof conditions, battery design, equipment, weather and future utility changes.
Can I use this without installing solar?
Yes. You can use it to see how an EV, heat pump or other electric equipment could change your bill, whether or not solar is right for your home.
Why email my results?
It gives you a copy of your choices and results to review later, share with family, or use to start a more detailed conversation.
What's needed for a design specific to my home?
A detailed review looks at 12 months of PG&E usage data, roof layout, shade, electrical panel capacity, future EV or heat pump plans, backup goals and installation space.
About NRG Geek
NRG Geek is Robert Kelly's independent educational platform for practical Northern California guidance on solar, battery backup, EV charging, heat pumps and home electrification.
Every home is different. Electricity use, rate plan, roof, shade and future electrification plans all affect what solar and batteries can do for you.
Privacy, legal and terms
How is my information used?
The Email My Results button opens your email app with your choices and results. Nothing is sent until you send it. If you ask for personal guidance, Robert may follow up. NRG Geek does not sell your personal information.
Is this a proposal or guarantee?
No. Results are estimates for educational planning and are not a proposal, engineering design, financial guarantee or utility bill guarantee.
Third-party links
Linked websites have their own privacy policies and terms. NRG Geek is not responsible for their content.
Accuracy
PG&E rate plans, prices, regulations, equipment performance and incentives change over time. Verify important information before making financial or construction decisions.
Copyright
© 2026 NRG Geek. All rights reserved. This calculator and its educational content may not be reproduced without written permission.