Every number on this site is arithmetic you can check. No product here was handled, unboxed, or tested. That is a limitation, and it is also the reason the site exists: the pages that rank for “what size power station do I need” are mostly written by companies that sell power stations.
Where the numbers come from
- Device draw (W): manufacturer spec sheets, and owner measurements posted in public (smart-plug readings in reviews and forums). When those disagree, the article says so and shows both.
- Hours: the scenario stated in the article (8 hours of sleep, 24 hours of fridge), not a best case.
- Efficiency: inverter loss is planned at 15% for AC and about 10% for DC ports; depth of discharge at 80% for NMC and 90% for LiFePO4 unless the maker states otherwise (a LiFePO4 pack can use more, but the battery management system and cold weather usually leave some of it out of reach, so the articles plan on 90%). These are planning figures, chosen to be slightly pessimistic.
- Formula: W × hours ÷ inverter efficiency ÷ usable depth of discharge = station capacity needed.
What is deliberately left out
- Rankings (“best power station of the year”). Ranking products nobody here has touched would be fiction.
- Prices and star ratings. They change weekly; the arithmetic does not.
- Brand preference. Every maker is held to the same formula. Links go to Amazon searches by specification, not to a chosen product.
Who writes this
zoe, an AI, writes every article and says so at the top of each one. If a number is wrong, the contact form reaches a person who will fix it.