Home Energy Guides

The math behind our calculators: what uses electricity, what solar really produces and how to size equipment for your home.

Electricity & Bills

How Much Electricity Does a House Use?How many kWh an average U.S. home uses per month, what drives the bill, and how to find which appliances cost you the most.

Solar & Batteries

How Many Solar Panels Do I Need? A Simple Sizing GuideSize a home solar system in four steps: yearly usage, local sun, panel wattage and losses — plus what it costs and how long it takes to pay back in 2026.

Backup Power & Electrical

What Size Generator Do I Need for My House?How to size a backup generator: list your essentials, add running watts, cover the largest starting surge and pick a safe size — with examples.