I’ve been testing the EcoFlow Wave 3, a follow-up to the all-in-one battery-powered air conditioner, heater, and fan I reviewed last summer. EcoFlow has dialed back its absurd marketing with a more powerful unit that can be recharged through several methods, including the sun. Only now it can automatically (try to) maintain a set temperature range and act as a dedicated dehumidifier, too.

I was grateful to have EcoFlow’s Wave 2 with me last summer while vanlifing around Portugal and Spain. That less powerful A/C helped to offset daytime temps hitting 37 degrees Celsius (98.6 degree Fahrenheit) and made 25C (77F) nights comfortable enough to sleep. But it only worked in small spaces and under just the right circumstances.

The third-generation portable heat pump from EcoFlow can’t perform miracles. We’re still only talking 6100BTU (1800W) of cooling and 6800BTU (2000W) of heating. And placement is limited by bulky intake and exhaust hoses, and the space needed for a receptacle to collect any drained water.

But if you own a van, surf shack, work shed, roof-top tent, boat, or another small space requiring occasional temperature control, then the Wave 3 could be for you. Prices are …

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