Nighttime on the water should be peaceful, but my generator roars through the night, draining power. I need a quiet solution that lets me rest easy, without constantly worrying about power consumption.
When we're anchored for just a few hours, I don't want to waste time on complicated setups or deal with loud generators. I just need fast, effective cooling to make the most of our time on the water.
My boat is all about flexibility and off-grid adventures, but space is tight, and power is precious. How can I cool down without overloading my system or taking up valuable space?
On a small sailboat, every inch counts, and adding a bulky air conditioner just isn't an option. I need a cooling solution that's compact, efficient, and doesn't disrupt my simple, minimalist lifestyle.
Just 22 lbs and ultra-compact, so it's easy to move and fit into any space from V-berths to small cabins.
Drops cabin temperature fast—no more "just-a-fan" disappointment on humid nights.
Consumes just 150–500W, perfect for off-grid living and boats with limited power resources.
Runs on AC (100–240V), DC (48V), an inverter, or your compatible power system.
No generator noise, no distractions. Just uninterrupted sleep wherever you anchor.
Set it down, connect the duct, press ON. No thru-hulls, no permanent mods, no downtime.
View Mark 3 Series User Manual
| Cooling Capacity | 1550W/ 5280BTU |
| Heating Capacity | 1700W/ 5800BTU |
| Working Mode | Rocket/Cool/Sleep/Fan/Dry/Care/Heating |
| Cooling Rated Input | 500W |
| Wind Speed Level | 4 |
| Rated Working Voltage | 48V DC |
| Working Voltage Range | 38V-58.5V |
| Thermostat Setting | Cooling: 61℉-82℉/16°C - 28°C Heating: 64℉-88℉/18°C - 31°C Dehumidifying: 15% - 90% relative humidity |
| AC Adapter Input | 100V-240V (50Hz/ 60Hz) |
| Ambient Temperature for Operation | 50°F-104°F/10°C-40°C |
| Ambient Temperature for Storage | 14°F-140°F/-10°C-60°C |
| Refrigerant | R290 |
| Unit Size |
22"L x 10"W x 12"H / 56cm x 26cm x 31cm
|
| Weight | 22lbs/10kg |
| Moisture Protection | IPX4 |
| Ventilation Configuration | Dual Hose |
Mark 3 Battery Specification
View Mark 3 Battery User Manual
| Battery Type | 21700 Lithium-Ion Polymer Battery |
| Net Weight |
14lbs/6.4kg
|
| Unit Size |
20"L x 8"W x 4"H / 51cm x 21cm x 11cm
|
| Capacity | 1022Wh |
| DC Charge Input Voltage | 12V-60V |
| Charge from 0% to 80% | About 2 hours (by official power adapter) |
| Safety | Short protection Over current protection Low voltage protection Over temperature protection |
| Chainable | Support 2, 3, 4, or more batteries chaining one after another |
| Operating Temperature |
14°F-104°F/-10℃-40℃
|
| Output Power Max | 550W |
| Output Voltage | 42V-58.8V |
| 12V Anderson Output | 12V/10A Max(120W) |
| USB Type C | PD(100W Max) |
| USB Type A | QC 3.0 18W |
| Charging Method | Power adapter from the wall outlet Solar Panels Cigarette Port |
| Charging Limited Current | 10A |
| Charging while discharging | Yes |
For Mark 3 Basic (AC Only), the package includes the following:
The Mark 3 measures 22" x 10" x 12" and weighs 22 lbs. Its compact size and lightweight design make it easy to carry and store.
The Mark 3 delivers a cooling capacity of 5,280 BTU, specifically engineered for targeted cooling in outdoor and off-grid environments.
The power consumption of the Mark 3 varies depending on the operating mode:
Yes, the Mark 3 has a heating mode. However, it is important to note that this function is designed as a supplementary feature, rather than a primary heating solution. Due to power limitations, the heating mode is only effective when the ambient temperature is above 50°F (10°C).
We recommend first using your primary heating system to raise the room temperature to your desired level, and then using the Mark 3’s heating mode to help maintain that temperature.
As with most air conditioners, during cooling operations, the front of the unit releases cold air while the rear expels warm air
Yes, the Mark 3 includes the Dry mode that helps reduce humidity in your space, making it more comfortable in hot and damp environments.
The noise level varies depending on the mode:
The Mark 3 features a dual-duct system, which uses two separate air pathways—one for intake and one for exhaust—located at the back of the unit. This design offers several benefits that improve cooling efficiency:
As a result, the dual-duct system provides better cooling performance and enhanced energy efficiency compared to single-duct portable air conditioners.
Whether or not ducts are necessary depends on your environment and setup:
For targeted cooling, you can also install the front air outlet duct in either case to direct airflow more precisely to the desired area.
When plugged into a standard AC wall outlet (100V–240V), the Mark 3 can operate continuously, as long as it is properly maintained and in good working condition.
If running on Mark 3 battery power, the runtime depends on the selected mode and the number of batteries connected. Here’s a breakdown of the expected working time:
You can recharge the Mark 3 battery through several methods:
No. The Mark 3 can also run on third-party power supplies.It requires up to 500W of power and can operate from:
Absolutely. The Mark 3 is designed for safe, portable use on boats. It does not require any through-hull installation, permanent mounting, or external refrigerant lines, allowing you to enjoy powerful cooling without complicated setup or structural modifications.
The Mark 3 is covered by a warranty as outlined in the ZERO BREEZE warranty policy. For full details, please refer to the policy here: Warranty Policy.