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  • Jetboil - Joule Stove - Black

Jetboil Joule Stove


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    • Black, One Size

    4 Reviews


    A water-boiling speed demon that will feed up to five and heat consistently in sub-freezing temperatures.

    Jetboil's new Joule Group Cooking System is the company's largest backpacking stove to date, and its inverted canister design with a fuel regulator provides consistent heat in sub-freezing temperatures. Equipped with a voluminous 2.5-liter cooking vessel and powered by a 10,000 BTU burner, it'll boil soup or water for you and two to four of your friends or family members in less than three minutes (2 minutes and 40 seconds to be exact) when you're spending the night high up on a snowy mountain. The boiling time is almost half of Jetboil's other group cooking system unit (the Sumo), and the burner can be adjusted to simmer liquids as well bring them to a boil. The stove's smart design essentially turns the cooking vessel and burner into one integrated unit; Jetboil's patented FluxRing unites the two pieces, provides a built-in wind barrier, and efficiently draws hot air from the burner to the cooking vessel to enable its very rapid boiling rate. This integrated design, along with a beefier burner unit, also provides excellent stability.

     The burner and fuel canister pack into the cooking vessel, and the locking handle on the cooking vessel folds down for a compact transporting size. Considering the stove's ability to feed up to five people, its 6.5x8-inch pack size is relatively compact. Once you've reached your stopping point for the day, stove set-up is a breeze, and doesn't require the special priming steps of much fussier liquid/multi-fuel systems. With one quick push of the Piezo igniter button, light the Joule, and get to work on your gourmet stew amidst stunning natural scenery that would put any four-star restaurant to shame.

    • Powered by canister fuel (Jetboil's isobutane/propane blend recommended)
    • Larger size for groups of 3-5, but still compact enough for backpack
    • Fastest boil time in its category at 2 minutes and 40 seconds
    • Easy setup with built-in protection and ability to simmer as well as boil
    • Convenient and reliable push-button piezo igniter
    • Stable design with FluxRing cooking vessel and burner acting as integrated unit
    • Low-maintenance and reliable
    • Provides consistent heat to 10 degrees Fahrenheit (-12 degrees Celsius)
    • 2.5-liter insulated cooking vessel included
    • Fuel canister and Alpinist kit (for extreme climates) sold seperately
    • Item #JET000A

    Tech Specs

    6.5 x 8 in
    Fuel Type
    canister (butane)
    Burn Time
    1 hour 4 min
    Boil Time
    2 min 40 sec
    Heat Output
    10,000 BTU
    Piezo Ignition
    Fuel Bottle or Canister Included
    Claimed Weight
    1 lb 9.2 oz
    Recommended Use
    four-season backpacking or camping
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
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    Great Idea - Poor Execution

    • Familiarity: I've put it through the wringer

    The Joule stove is brilliant concept. An inverted liquid feed canister stove with a hanging option and a 2.5l pot - perfect for high altitude expeditions - right? The liquid feed means it should work great in cold weather, the large pot means melting snow for water will take less effort and time.The devil is in the details. Unfortunately, the Joule seems to have been designed without enough thought and testing. The first and most significant problem is that the valve stem is really long. This means it can accidentally (easily) be slightly levered in such a way that a valve leak can occur. This is a big deal - we had a valve leak (and fire) in our tent with the stove hanging from the ceiling. (Yes, I know all the manufacturers say not to cook in the tent.) The second issue is that Jetboil thinks a piezoelectric starter will be useful to legitimate users of this stove. Such starters are useless over about 2500m. Having one is not really a problem but its position makes it really hard to light the stove with a lighter without removing the integral pot. This means removing the pot from the hanging kit and finding it a safe home while lighting. This brings us to the third major issue - the pot handle. The handle is dangerously flimsy. I had to bring a small block of plastic to wedge between the handle to ensure the handle didn't fold up while pouring. GSI uses the same style of handle but theirs are significantly beefier and more reliable. It is hard to understand why a 2.5L+ pot (over 5 pounds full of water) would have such a weak handle. I love the concept of this rig and have used hanging stoves for decades (my first was the Bibler) I encourage Jetboil to redesign and redeploy the Joule; in its present iteration it is dangerous. If you are just using it for car camping or low altitude hiking it might be fine but then you likely don't want or need a stove like this one.

    Broke after first use, not reliable

    • Familiarity: I've used it once or twice and have initial impressions

    I got this earlier this year hoping to use it as an alternative to whisperlite on not-so-arduous winter trips. It worked great when I started it, but after boiling about five liters of water, it completely broke down. The top part of the burner popped off and there's no way to put it back in. And it won't ignite any more.

    I would not bring this on any serious trip where you need to be able to count on your gears working reliably.

    Broke after first use, not reliable

    Turbo boil!

      Excellent portable stove unit. Super efficient boil time for those that need to make coffee and a few dehydrated meals while exploring off the beaten path. The piezo electric starter is a nice convenience to get it going quickly.

      Holy crap this is a snow melting machine

      • Familiarity: I've used it once or twice and have initial impressions

      Used this the other day at 11,700' in about 10-20 F temperatures. It started right up, but took a few minutes to properly warm up. I recommend leaving the fuel flow rate to low until the thing gets warmed up. Once the stove was purring we brewed up 4L of water in under 30 minutes. We actually were having a tough time keeping the thing full of snow! Once full of snow it melted and warmed it faster than we could get the pot off to brew a second batch. A 4L pot for this sucker would be amazing for expeditions.

      For anyone that is asking the Joule system is kind of on its own when it comes to Jetboil compatibility. It wont be compatible with any of the other stove/cups. The sumo, flash, minimo, zip all use the same burner and attachment so they are all interchangable