Cool air from sunlight, in a box that won't rust.

A 5,400 CFM evaporative cooler in brushed stainless steel, paired with its own solar cart. Runs all day on sun, into the evening on battery, and plugs into the wall when you want it to.

See how it worksFull specs
5,400CFM of airflow
0 kWhfrom the grid on a sunny day
304stainless, inside and out
CoolerSolar pair

How it works

Sunlight becomes 24-volt electricity, the battery evens it out, and a brushless fan pulls hot dry air through wet pads. Water evaporating is what does the cooling, so most of the power goes to moving air, not making cold.

Energy flow from sun to panel to charge controller to battery to fan and pump to pads to cool air Sun ~5 peak hours 600 W panel 2.4 kWh a day MPPT 30 A tracks best voltage Charge controller stops overcharge 24 V 100 Ah LiFePO4 Battery 2.5 kWh, evens the day Fan + pump 280 W at full speed Wet pads water evaporates Cool air 10 to 15 °C drop Amber: electricity from the sun. Blue: air and water.
Hour of the day 12:00 · panel 480 W, battery charging
1. Sun to panel

One 600 W bifacial panel on a 25° tilt makes about 2.4 kWh on a clear day.

2. Panel to battery

A 30 A MPPT controller charges a 24 V 100 Ah lithium iron phosphate pack.

3. Battery to fan

A brushless 24 V motor moves 9,000 m³/h while drawing only 280 W. The pump wets three pads.

4. Pads to you

Hot dry air gives up heat to evaporate water. It leaves the grille 10 to 15 °C cooler and slightly humid.

Why it's built this way

Two carts, not one

A 600 W panel is 2.3 m long. Bolting it to a cooler makes a top-heavy sail. Splitting them lets the panel face the sun while the cooler sits in the shade where you are, joined by a 5 m cable. Each cart sells on its own: the cooler with a mains adapter, the solar cart as the upgrade.

Stainless, not plastic

Evaporative coolers live wet and in sunlight, which is exactly what makes plastic go brittle and chalky. 304 stainless takes water, UV and a hose-down for decades, and the brushed skin is the whole look. The grille is laser-cut with a phi-ratio pattern that keeps 40% open area so airflow doesn't drop.

Slim on purpose

At 380 mm deep it rolls through a standard door and sits against a wall. Pads on three faces instead of four still give the full 5,400 CFM; the solid back is where the cable and drain live.

Sized for a full day

Full speed all day needs about 2.8 kWh. The panel gives 2.4 and the battery covers the rest and the evening: it starts full, tops up at noon, and still has about 3.5 hours left after sunset.

  • Removable stainless water drawer, 40 L, hose auto-fill
  • Battery box doubles as ballast over the rear wheels
  • Anderson connector, 40 A breaker, no exposed wiring

Specifications

Cooler cart

Airflow5,400 CFM / 9,000 m³/h
Motor24 V brushless DC, 250 W, 5 speeds
Pump24 V, 25 W, three-pad distribution
PadsThree cellulose pads, front and sides
Tank40 L stainless drawer, float valve
Size1,100 × 750 × 380 mm
WeightAbout 38 kg dry
Shell1.2 mm 304 stainless, brushed
Power in24 V DC inlet or 100–240 V adapter

Solar cart

Panel600 W bifacial mono, 2,278 × 1,134 mm
Tilt25°, two-position strut (15° / 35°)
Controller24 V MPPT, 30 A, 100 V PV input
Battery24 V 100 Ah LiFePO4, 2.56 kWh, BMS
Daily yieldAbout 2.4 kWh in 5 peak-sun hours
Cable5 m, Anderson SB50, 40 A breaker
Footprint2,400 × 1,250 mm
WeightAbout 65 kg with battery
Wheels200 mm pneumatic rear, locking castors front

Pricing

Buy the cooler on its own and add the solar cart later, or take the pair and never plug it in.

Cooler cart

$1,190
  • 5,400 CFM stainless evaporative cooler
  • 24 V DC inlet plus mains adapter
  • Runs off any 24 V solar or battery system
Reserve

Solar cart

$1,090
  • 600 W bifacial panel on a stainless tilt frame
  • 24 V 100 Ah LiFePO4 battery, 30 A MPPT
  • 5 m cable, powers any 24 V load
Reserve

The pair

$1,990$2,280
  • Both carts, matched and tested together
  • Full-day cooling on sun alone
  • About 3.5 hours after sunset on battery
Reserve the pair

Pilot-run pricing, USD, shipped from the GenBuilt factory in Zhongshan. Freight and duties quoted at order.