Guides for the United States

Guides written for the United States: local rules, prices and shops.

Looking for general articles? See the blog

• How much solar power you get in each region of the United States

  Published October 20, 2026Topic: Basics

  What a 100 W solar panel gives per day, month by month, in 7 US regions, from many years of real weather records.

• How big a battery backup do you need for a power outage?

  Published October 20, 2026Topic: Basics

  Size backup power for US outages in plain steps - what must keep running, motor surge, outage length, battery, solar or generator, and electrician rules.