Watts on the Roof
Power that stays on

Keep the lights on, on or off the grid.

Honest, tested guides to solar and battery backup for your home, cabin, van, or homestead. No installer calls. No fluff.

Size my system → Best backup systems
Independently tested No sponsored rankings Updated monthly

Atmospheric hero image goes here (sunny home + battery backup).

Start with your setup

Same gear, different goals. Pick where you are.

Home Backup

Ride out outages and shave the bill, right here in town.

Off-Grid & Cabins

Full independence for a place past the power lines.

Van & RV

Compact systems for life on the move.

Gear & Components

Panels, batteries, inverters, and charge controllers, compared.
The free tool

How much solar and battery do you actually need?

Answer a few questions about what you want to run and for how long. We size the panels, battery bank, inverter, and controller, then point you at gear that fits.

Open the sizing calculator →
Daily use8.4 kWh
Days of backup2 days
Battery bank14.3 kWh
Solar array2,400 W
Inverter6,000 W

Latest guides

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Best Home Battery Backup Systems (2026)

The home backup systems we would buy now to ride out an outage, from plug-and-play power stations to whole-home all-in-one inverters.

How to Size an Off-Grid or Backup Solar System (2026)

A plain-English walkthrough of sizing your battery bank, solar array, charge controller, and inverter, with a free calculator to do the math for you.

Recent reviews

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9.0 EcoFlow

EcoFlow DELTA Pro 3 Review (2026): The Easy Path to Home Backup

The simplest way for most homeowners to get meaningful backup power without an install. Expandable when your needs grow.
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