Estimated yearly energy use and cost
Where the electricity goes
Each load updates as you change the design.
Mixed-fuel vs all-electric
The same home, EVs and extras, with different equipment. Before solar.
Solar planning
Title 24 requires solar on new homes, but the minimum often won't cover a modern home's full use.
How these numbers are calculated
The household baseline covers lighting, refrigeration, electronics, dishwashing, ventilation fans and other everyday use. It's scaled to California's 2019 Residential Appliance Saturation Study (RASS), where the average single-family home used about 7,550 kWh a year for everything, including air conditioning.
Heating and cooling use the same North Bay climate values as the NRG Geek Heat Pump HVAC Calculator, reduced 40% for a new home built to current Title 24 code. Water heating uses the same model as the Heat Pump Water Heater Calculator, based on household size.
Electricity cost is your use times the per-kWh rate, plus PG&E's fixed Base Services Charge. Solar production is size times yearly output per kW for your roof's sun. This is a planning estimate, not a Title 24 compliance calculation or final solar design.
About this planning tool
Is this a solar proposal?
No. It's an educational planning tool, not a proposal, engineering design, Title 24 calculation or bill guarantee.
Will Title 24 solar cover the whole home?
Often not. The code minimum is sized for the building, not for EV charging, pools, ADUs or how you'll actually live in the home.
Why email my results?
It gives you a copy to share with your architect, builder or family, and a starting point for a detailed design.
What's needed for a final design?
Your plans, roof layout and shading, equipment selections, PG&E rate plan and how your household expects to use energy.
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. Design, equipment, occupants and site conditions all affect real energy use.
Privacy, legal and terms
How is my information used?
The Email My Results button opens your email app with your inputs 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 rates, building codes, equipment ratings 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.