About The Watt Guide

Why this site exists

Buying a battery is unreasonably hard. Every manufacturer quotes capacity in a slightly different way, every review site tests a different subset, and the specification that decides whether something suits you — cost per usable watt-hour — is published by nobody.

The Watt Guide puts the same figures side by side for the brands that matter, and explains what they mean in terms of things people actually own: a fridge, a CPAP machine, a router, a van.

What we cover

• Portable power stations — Bluetti, EcoFlow, Anker SOLIX and Jackery
• Solar generators — and whether the panel bundles are worth it
• Home battery backup — from extension leads to installed systems
• Plug-in and balcony solar — the renter-friendly route into solar
• Off-grid and RV power — including what Starlink really costs you in watt-hours

Who runs The Watt Guide

The Watt Guide was founded and is published by David K. The articles are researched and written with AI tools, working from manufacturer specifications and list prices; how we research sets out the method. Corrections and questions reach him through the contact page.

How we pay for it

Affiliate commissions. If you buy through a link here we may earn a percentage, at no extra cost to you. We also cover products that pay us nothing at all — Bright Saver is a nonprofit with no affiliate programme and it is genuinely the cheapest way into plug-in solar, so it is on the site.

Read how we research for the full picture.