★ Free shipping on every cooler, lower 4830-day money-back guarantee · 5-year stainless warrantySupport: [PHONE] · Mon–Sat 7am–7pm MT

Cool your garage, patio or shop. No power bill.

CoolerSolar is a stainless steel swamp cooler that runs all day on its own solar cart and into the night on battery. Plug it in when you want to. Never rusts. Backed by real people in the US.

Shop the 3 sizesSee the guarantee
Coming to a home center near youShips direct from our warehouse
CoolerSolar stainless cooler cart and its solar cart, connected by a cable
5-year stainless warrantyShell, frame, drawer and grille
2-year electrical warrantyMotor, pump, controller, battery
30-day money backTry it in your own heat
US phone supportParts stocked stateside

Pick your size

Every model is a two-cart system: the cooler, and a solar cart that carries the panel, battery and charger. Both roll. Both are 304 stainless.

CoolerSolar Mini

1,300CFM
Bedroom, office, camper · up to 300 sq ft
$899
  • 150 W panel, 12 V 50 Ah battery
  • Runs 10 hrs on sun, 5 hrs after dark
  • 20 L tank, 22 lb cooler
  • Draws just 66 W
Order Mini

CoolerSolar 30

3,000CFM
Patio, workshop, small shop · up to 750 sq ft
$1,449
  • 350 W panel, 24 V 50 Ah battery
  • Runs 10 hrs on sun, 4 hrs after dark
  • 32 L tank, 66 lb cooler
  • Draws 150 W
Order the 30

CoolerSolar 54

5,400CFM
Garage, barn, event, greenhouse · up to 1,400 sq ft
$2,099
  • 600 W panel, 24 V 100 Ah battery
  • Runs 10 hrs on sun, 3.5 hrs after dark
  • 40 L tank, 84 lb cooler
  • Draws 280 W
Order the 54

Prices in USD, free shipping in the lower 48. Cooler cart sold separately for customers who already have 24 V solar.

Our guarantee, in plain English

5 yr

Stainless warranty

If the shell, frame, grille or water drawer rusts, cracks or fails in normal use within five years, we replace it. Stainless is the reason we can say that.

2 yr

Electrical warranty

Motor, pump, controller, charge controller, battery and panel are covered for two years. We ship the part; most swap with four screws.

30 day

Money-back

Run it in your own heat for a month. If it isn't the coolest spot on the block, send it back for a full refund. We pay the return freight.

Registered at coolersolar.com/register. Warranty transfers with the unit if you sell it. Wear items (cooling pads, casters) excluded.

How it works

Evaporative cooling uses water, not refrigerant. Most of the electricity just moves air, which is why a single solar panel can run it all day.

Sun to panel

The panel on the solar cart makes 24 V (12 V on the Mini) electricity from about 6 am to 7 pm.

Panel to battery

A charge controller fills the lithium battery and keeps it from overcharging.

Battery to fan

A brushless motor pulls hot, dry air through three water-soaked pads.

Cool air out

Water evaporates and takes the heat with it. Air leaves 10 to 25 °F cooler.

CoolerSolar on a covered patio at sunset, solar cart in the yard

Best in dry heat

Evaporative coolers shine where the air is dry: Arizona, Nevada, Utah, New Mexico, Colorado, inland California, West Texas. In those climates a 5,400 CFM unit will drop a garage 20 °F or more. In humid regions it works as a powerful fan with a mild cooling effect.

Two carts on purpose

The panel wants sun. You want shade. A 15-foot cable lets the cooler sit where you work while the panel sits in the yard. Roll the cooler inside at night and it keeps running on the battery.

Service you can call

Talk to a person

[PHONE], Monday to Saturday, 7 am to 7 pm Mountain. Or text a photo of the problem and we'll call you back.

Parts on the shelf

Pads, pumps, motors, controllers and batteries stocked in the US. Most parts ship same day and swap in under 15 minutes with a screwdriver.

Setup in 10 minutes

Unbox both carts, fill the drawer, tilt the panel toward the sun, plug in one cable. A printed quick-start is in the box; the video is at coolersolar.com/start.

Pad replacement plan

Fresh pads shipped every spring for $[XX]/yr. Cancel any time. Clean pads mean cold air and a motor that isn't working overtime.

Contractor and fleet pricing

Ten units or more, or outfitting a crew? We do volume pricing, extended warranty and on-site setup.

Made to be repaired

Every fastener is standard, every panel bolts off, every wire is labeled. When something wears out, you fix it, you don't replace the whole unit.

Straight answers

Will it really run all day with no power cord?

Yes, in sun. The panel is sized to run the fan at full speed through a summer day, with the battery covering clouds, early morning and about 3 to 5 hours after sunset. If you want it on all night, plug in the included wall adapter.

How much water does it use?

Roughly 2 to 4 gallons an hour on the 54 in dry heat, less on the smaller units. Hook up a garden hose to the auto-fill port and forget about it.

Does it work in humidity?

It cools best under about 50% humidity. Above that it's still a strong fan with some cooling, but if you're in Houston or Florida, an air conditioner will serve you better.

Can I use my own solar or a generator?

Yes. The cooler cart has a standard 24 V DC inlet (12 V on the Mini) and a wall adapter. Any 24 V battery or solar system with the right connector will run it.

What's the battery?

Lithium iron phosphate, the safe, long-life chemistry. Rated for 3,000+ charge cycles, which is 10 or more summers.

Why stainless?

Plastic coolers go brittle and chalky in sun and water within a few seasons. Stainless doesn't. It's also why we can offer a five-year warranty on the body.

Where is it made?

Designed in California. Fabricated and assembled at our own stainless factory. Warehoused, supported and serviced in the United States.

Ready for a cooler summer?

Free shipping. 30 days to change your mind. Five years on the steel.

Shop the 3 sizes