tldr; Reddit overwhelmingly recommends the Anker 535 PowerHouse. With 100% positive sentiment across 5 mentions, this is a clear community favorite.
$299.99 on AmazonBest praise vs top criticism for Anker 535 PowerHouse
“If this helps. I chose the Anker EverFrost 30 as I thought for two people over about a week it was the right size as there weren’t 4 limited-life big blue ice things taking up space. And I was right although next year I’ll probably upgrade to the 40 capacity. My wife (a real chef) loves it; no soggy anything. Here’s my layout. I already have faith in Anker and so a few years ago I bought the 535 PowerHouse - 512Wh | 500W unit. This pretty much stays in the Go to charge watches, iPhones, iPads, earbuds, lights. Occasionally it goes outside to power a cell booster or the occasional Starlink. The Anker EverFrost was a game changer on wheels. It has its own removable battery with plenty of USB outlets. One can run off this or plug the cooler into a car outlet directly while the battery pack is externally busy. All cords are included. When I first purchased it, I topped the battery off and let it run for a while at home to see what it could do. It was about the same in the field as well as in the garage. It looses about 15-20% a day (depending on ambient (we have a solar cover for it and all coolers)) so about 5 days on a charge. This was for about 41 degrees internal; really don’t need it freezing. Of notes, the app works well for monitoring and you won’t hear this cycling unless you are sleeping next to it. I could certainly use the 535 to charge it or plug it into the Subaru but I bought a 100W foldable solar panel from Temu for U$100 that has a nice long cord and will charge it in about 3-4 hours of direct sunlight. It will also charge the 535. So yeah, it is a bit of an Anker camp but the interchangeability makes it so there is no end to how long this will cool or charge things. I’ll usually keep the solar panel connected to the cooler to keep it ‘topped off’. Edit: I will buy the new EverFrost 2 and sell my 30. Source: me for personal use. Disclaimer: none. I have no dog in this. But I do hope this helps. Side note: The Dometic appears to be made by a similar overseas manufacturer. It does not appear that the battery is removable, nor does it have the versatility that the Anker does. Also, and again this is me speaking, the Anker is less expensive making it a better value.”
5 Reddit opinions analyzed • Last updated 4/5/2026