EcoFlow Wave 2 Review: A Portable AC and Heater That Actually Delivers, With Caveats

Introduction

EcoFlow makes portable power stations, and it turns out they also make a portable battery-powered air conditioner and heater: the Wave 2. It is one of the more interesting compact climate units to appear in a while, and after using one in a cold Montana shop, it is easy to see the appeal. It is not perfect, though, and the biggest issues come from how you set it up rather than the unit itself.

What the Wave 2 Is

The Wave 2 is a compact unit that both cools and heats. Around the body you get a front air intake, a front output for conditioned air, a full control panel on top, and app control as well. On the side there is a power input that accepts AC, solar, or battery power. The rear houses the heat exchange side, with its own air in and air out ports so waste air can be routed away from the space you are actually conditioning.

In use, it heats fast. EcoFlow claims it can raise the temperature from 68 to 86 degrees Fahrenheit in about five minutes of heating, and in a chilly shop where the morning started at 34 degrees, it kept things comfortable enough to work in short sleeves.

Ventilation: The Part Most People Get Wrong

The Wave 2 has four air pathways: inside air intake, conditioned air output, outside air intake, and waste air output. That last pair matters. When the unit makes one side hot, the other side produces the opposite temperature, and physics does not let you cheat that. If you let the waste air blow back into the same room, at best nothing changes, and at worst you actually lose ground.

That is why setups where someone just sits in a closed room next to the unit do not work. If you are outdoors and want cool air blown straight at you, or you have the unit outside a tent with the adapter plate feeding air in while the waste air disperses outside, it works well. Indoors, you need the rear ducts running to a window or outside so the waste air exits the space.

Maintenance Is Not Optional

Running the cooling side produces condensation, which collects in a small reservoir at the bottom of the unit. Periodically you have to drain it through the little drain hose. Some people expect to flip a switch and get free cold air forever, but there is no free lunch here: regular draining is part of owning this unit.

Another practical note: because of the refrigerant liquids and gases inside, you cannot just toss the Wave 2 on its side in a trunk and fire it up. If it has been tilted more than 10 degrees, you need to let it rest upright for a period so the fluids settle back into place before running it. Read the instructions with this one; it genuinely matters.

Battery and Power Options

EcoFlow sells an add-on battery pack that attaches to the Wave 2, but it is optional. The unit can plug into a wall outlet, another battery system, or its dedicated battery pack. It also has solar inputs for off-grid charging, and car charging is possible.

For tent campers this is a genuinely useful setup. In summer you get cooling; in cold weather you can use it as a heater and extend your camping season without bringing a dangerous heater or a tent stove into the tent, so there is no carbon monoxide concern. For late-season hunters dealing with chilly mornings, that is a real safety and comfort win.

Power and Runtime

Plugged into a larger power station, the Wave 2 ran for around 11 hours at full power in testing, which is enough to get through a full day in a shop. EcoFlow says pairing it with a Delta Max extends runtime up to 14 hours, though that depends heavily on whether you run it at full output. If you already own a power station, you may not need the dedicated add-on battery at all; strapping one on just makes the unit heavier, and it is not the lightest thing to begin with.

What Is in the Box

The package includes the unit itself, three exhaust plate covers, a window vent board, the AC adapter, two accordion ducts, a water drainage hose, and the instruction booklet. The window vent board is a nice touch: it is made from the foam packing material at the bottom of the box, so it pops out ready to seal the window opening for the two hoses. A carry bag and the add-on battery are available separately.

Buying Advice

At around $1,000 on sale, the Wave 2 is not inexpensive, and it is a fairly high-tech piece of equipment. It makes the most sense if you have a real use case: a shop or workspace without reliable heat, tent camping in summer heat, or extending the camping and hunting season into colder months. If you already own a compatible power station, you can skip the add-on battery and save weight and money. And whatever you do, plan your ventilation before you buy. The unit performs well, but only when the waste air has somewhere to go.

Conclusion

The Wave 2 is a genuinely capable portable AC and heater with fast heating performance, flexible power options, and clever touches like the repurposed foam window vent. The trade-offs are real but manageable: mandatory drainage maintenance, careful handling after tilting, and a setup that demands proper airflow. Get those right and it is one of the more useful portable climate units you can put in a shop, a tent, or a vehicle.