Before you call a
solar installer,
read this.
The straightforward home energy guide for California homeowners (but useful for others as well). What to do first, what to skip, and what the industry won’t tell you.
Calculators & tools
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Home Readiness Assessment
What to do first, in your situation
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Solar ROI Calculator
Will full solar actually pay off?
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Plug-in Solar Finder
Best kit for renters and small spaces
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Incentive Finder
Rebates and programs you qualify for
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Heat Pump Selector
Right system for your home setup
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New Build Planner
Building or renovating? Start here
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Guides & research
Browse all 20 →
- Where to Start: The Honest Priority Order for CA Homeowners Start here →
- Is Solar Still Worth It in California in 2026? Solar →
- NEM 3.0 Explained: What It Actually Means for Your Decision Solar →
- Why Air Sealing Is Your Home's Best Investment Foundations →
- Heat Pump Water Heaters: The Upgrade That Actually Pencils Out HVAC →
- Heat Pumps: What's Real, What's Hype for California HVAC →
- Earth Tubes: Real Technology, Real Risks Exotic →
- Rocket Mass Heaters: Efficiency Numbers and Permitting Reality Exotic →
- Earthships: Real Builds, Real Costs, Climate Limitations Exotic →
- Passive House: What It Actually Takes New build →
- Insulation: The Honest Guide to R-Values and ROI Foundations →
- Energy Audit: What You Actually Get (and What to Watch Out For) Foundations →
- Windows: When Replacement Actually Makes Sense (Rarely) Foundations →
- Plug-In Solar: The Renter's Solar Strategy Solar →
- Browse all 20 guides → →