2 Pack of Xtreme Heaters Small 400w XHEAT RV & Camper Heater

This winter, I decided to try something new to protect the batteries and electronic steering in my pontoon boat from freezing. Normally, I’ve had to replace my two batteries every year when the temperatures drop, which gets expensive. To prevent that, I installed an Xtreme Heaters 400W heater under the back seat where the batteries are located. I also added a battery charger in the same area.

So far, it’s working great! We’ve had some days below 20 degrees, and the batteries are holding up perfectly. As a bonus, this setup also keeps the steering assist components, gas filter, and other parts under the seat from freezing, which gives me peace of mind.

This might not be the typical use for an Xtreme Heater, but it’s been a game-changer for me. I’m also planning to add a second heater under the boat cover to keep the interior above freezing. I believe this will help prevent the leather seats and other materials from freezing, reducing unnecessary wear over time.

I wanted to share my experience in case it helps other pontoon owners think about creative ways to protect their boats during the winter.

Purchased the 400 watt xtreme heater to keep my lithium batteries warm in Minnesota in my camper van while in storage today its 24 degrees zero below and the heater is doing its job.I decided to add a picture to the 400 watt xtreme heater with mounting bracket this is a forced air heater so you can place the heater anywhere

Got this 2 pack for a G23 Paragon since there are 2 small compartments of concern for freezing, and they're working perfectly. Small size, big power, long cords. Do yourself a favor and grab the mounting brackets, as I wish I would've, since we like to "Winter Cruise" here and there. Can't go wrong with these! Great price, quick shipping, and excellent customer service are a HUGE plus too!!!

Bought this to keep my RV basement warm, where I keep my lithium batteries. Thought I might need another but no way, this thing works great! Keeps the whole basement warm and helps make sure my water pipes are safe too.

Ordered the mid sized heater 4 years ago and have left it in the bilge compartment every winter since with no issues (temps usually between 20-30 at night). Enables us to take the boat out on nice winter days. No more winterizing so more time on the water! Came with the power cord damaged (picture attached) but even so no issues thankfully! Not sure what life to expect but I’m confident in the product so I’ll be ordering another one soon as a backup.

We used our extreme heater to put in our Sprinter Van as it sat in Montana for the winter. It got down to -40⁰ and that little heater just kept on pumping. An absolute lifesaver! Again we used it in the van over winter. This time our van was in a garage (unheated). The heater cycled through all winter long keeping our DEF from freezing and our lithium batteries nice a cozy. It's a lifesaver!!

Great Product!

Winter has arrived and my Chris Craft Riviera needed a little heat for those cold nights. Xtreme 400w took care of my concerns. A perfect, simple solution for winterazation.

Last year, I tried to contact them over the phone in through email and no one ever gets back with you. Then, I tried to do the same thing this year and the exact same thing happened.
I purchased something else from a company that actually has people that can call you back, and this is inexcusable, and I had a friend who also tried to contact them and had the same problem.

If this turns out not good, I'll change my rating, but the concept seems sound. I need to set it on something to keep it dry. It's a tiny little thing with a good thick cord.
More to come!

When I was young and “cash challenged “ I knew I had to do something to keep my engine compartment warm. I could not afford a damaged block, engines cost thousands of dollars, replacing one out of my limited funds was out of my reach. So I tried various ways to keep the engine above freezing. I always winterized the engine in addition to having a source of heat . I even went through the light bulb and can phase, that ended when the LED bulbs came out. Not as much heat generated. Anyway my issue with funds drastically improved, and I purchased an Xtreme Heater. No more long winter nights worrying about my boats engine. I have had one of the smaller heaters for 12-15 years. No issues with the unit, none , nada! I keep my equipment in top condition, store them in my garage during the summer and check them out throughly before using them for the winter. Did I say I was a professional engineer? That’s why I am so anal about my equipment’. I now have my dream boat, a Hans Christian 38T. I still trust my Xtreme heater to protect my engine in winter. I live in Tennesse, but it can still get bitterly cold in the winter. I will continue to protect my engine with an Xtreme heater, and will do so as long as I have the boat! There is no question this is one of the best piece of marine equipment on the market. Don’t wait, get one of these jewels, trust me you will sleep better on those long winter nights.

David D.
S/v Ataraxia

My boat is winterized, but what about the bilge pump? This overbuilt heater provides inexpensive peace of mind. Best purchase since my bilge sipper!

This heater is bullet proof! We have had single digit cold temps and no frozen pipes! I have insulated with 1" Styrofoam around the bottom for wind and to try to hold the temperatures up but this heater is running like a champ on the thermostat. Even with very wet conditions while installed on the ground, no issues! Great heater, super over built to last for sure.

My extreme heater is getting the job done down here in Chicago

Great product

It is phenomenal

Great product! Works just like it should. Tried other heaters, ALL failed. This heater works Grest!

Nicely built! Works as described and has a good warranty to go along with the quality.

I love your product but I should of ordered the larger heater instead of the small one. I placed it in the engine compartment of my Cigarette boat with twin engines. Once the weather was lower than 32 deg it had a hard time keeping up. It's a small compartment about 6ft X 8ft X4ft with a hatch cover along with 3 top covers and vents are 99% covered. It was 25 deg outside and heater got to 31.6. Thank God i had wifi thermometers in there so i know the temps 24/7. Or i would possibly be buying new blocks. I then had to put an additional heater inside which is now at 56 deg. I may use it next year for the basement of my motorhome but then I don't think it will be powerful enough. I do plan on purchasing a much bigger model for next winter.
Ps, I don't think the website accurately describes the performance of the heater.

This is the first season using it. It works as advertised keeping the engine compartment between 40-50 degrees.

We've been using this under our camper and it's been working great maintaining the temperature. I really like the fact that it doesn't get hot,the unit stays cool to touch.

We bought to heat the engine compartment area of our our boat to keep it heated during the winter when the boat is winterized

Excellent performance for 11+ years! This is one reliable piece of kit. I monitor performance via a logging thermometer and even when it is 10° and fiercely windy the engine compartment has maintained ~40° 22’ Chaparral winters on a lift (out of the water) and the extremeheater handles the business. Bravo!