ZERO BREEZE Mark 3 AC

Unlike fans or swamp coolers that just move air around, the Mark 3 actively removes heat and humidity from your space. It works just like the air conditioner in your home or car:

• It pulls heat out of the air using a powerful compressor.
• It releases that heat outside through the condenser.
• It blows cool, dry air back into your sleeping space.

That’s what makes it real air conditioning — delivering true cooling and dehumidification, even on sticky summer nights.

The Mark 3 is built for personal and small enclosed spaces. Indoors, with good insulation, it can cool roughly 100–150 sq. ft. But for overlanding, it’s perfect for cooling your 2–3 person rooftop tent, enclosed trailer, truck bed, or the sleeping area in your truck camper at night.With its 5,280 BTU capacity, it keeps your sleeping space cool even on hot, humid nights. During the day, especially under intense sun or temperatures above 100°F, like any 5000 BTU AC, it may struggle to cool larger spaces fully. But it works great as a spot cooler — aim it directly where you sit or rest to stay comfortable even in peak heat.

It’s simple: connect power, hook up the drainage hose, and you’re ready to go. The rest depends on how you’re setting up camp:

• Open space: No ducting needed — just aim the front air outlet at you for direct spot cooling.
• Sleeping space setup:

Both ducting options work independently, so you can easily set it up based on how your rig is built and how you camp.

Watch more to see how to set up the Mark 3.

It depends on the mode you choose — and whether you're using one or two batteries. Here's the breakdown:

▶ With One Battery (1,022Wh):

• Sleep Mode (150–200W): 5–7 hours
• Rocket Mode (350–500W): 2–3 hours
• Cool Mode (200–350W): 3–5 hours
• Care Mode (150–350W): 3–7 hours
• Dry Mode (350–500W): 2–3 hours
• Heating (200–500W): 2–5 hours
• Fan Mode (12–17W, no compressor): 60–85 hours

▶ With Two Batteries (2,044Wh):

• Sleep Mode: 10–14 hours
• Rocket Mode: 4–6 hours
• Cool Mode: 6–10 hours
• Care Mode: 6–14 hours
• Dry Mode: 4–6 hours
• Heating: 4–10 hours
• Fan Mode: 120–170 hours

Of course, actual runtime may vary depending on outside temperature, humidity, and how much cooling your space requires. But with Sleep Mode and two batteries, most overlanders find it easily covers a full night of comfortable cooling.

Yes — the Mark 3 doesn't lock you into its own battery. It runs on 48V DC and draws up to 500W at maximum.If your system already delivers 48V DC, you can connect directly. If you're using a 12V system, you'll just need a 12V to 48V booster (available separately) to make it compatible.How long it will run depends on your battery capacity and which cooling mode you use. If you're unsure whether your setup is a good fit, feel free to contact us at cara@zerobreeze.com — we're happy to help you check compatibility with your system.

Yes. The Mark 3 includes a 100V–240V AC adapter. When connected to a wall outlet or shore power, it can run continuously without a battery.

The Mark 3 battery gives you plenty of flexible ways to recharge while you’re off-grid or at home:

• Car cigarette lighter: Connect directly to your vehicle’s 12V socket to charge the battery. (Important: do not power the Mark 3 unit itself through the car socket, as it may blow the fuse.)
• Solar charging: Use the solar charging cable to recharge from your solar panel setup.
• Portable power station: Charge through your portable power station as long as it provides 12V to 60V DC input.
• Shore power or home outlet: Use the 100V–240V AC adapter to recharge from any standard wall outlet.

👉 Learn more about how to charge the Mark 3 battery here. If you need further instructions on how to charge with your specific power system, feel free to contact us — we're happy to help.