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Xtreme Heaters RV Basement and Boat Bilge Heater with Quick-Release Bracket - Medium - 600 Watts
Xtreme Heaters

Xtreme Heaters RV Basement and Boat Bilge Heater with Quick-Release Bracket - Medium - 600 Watts

Part Number: XH77FR
In Stock
$466.00
RV Heaters
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This heater protects your critical equipment from freezing in your RV or boat. It keeps those mid-size spaces at the right temp with an automatic thermostat. And the quick-release bracket lets you install or remove the heater when the seasons change. Great Prices for the best rv heaters from Xtreme Heaters. Xtreme Heaters RV Basement and Boat Bilge Heater with Quick-Release Bracket - Medium - 600 Watts part number XH77FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Xtreme Heaters RV Heaters - XH77FR

  • Electric Heater
  • Xtreme Heaters
  • 110 Volts
  • Winterization
  • 5th Wheel
  • Motorhome
  • Travel Trailer

This heater protects your critical equipment from freezing in your RV or boat. It keeps those mid-size spaces at the right temp with an automatic thermostat. And the quick-release bracket lets you install or remove the heater when the seasons change.


Highlights

  • Keep Medium Compartments Warm: 600 watts of heating power with forced-air circulation to evenly warm mid-size RV bays and boat engine spaces.
  • Built for Safety: Ignition-protected and built to run reliably when the weather turns chilly, parked or docked.
  • Set It and Forget It: Automatic thermostat clicks on at 40ºF and off at 55ºF to keep the interior a steady temperature.
  • Simple Seasonal Convenience: Slide the heater in the included bracket in seconds when cold weather returns - no tools required.
  • Easy Operation: Just pull the latch, drop the heater in place, and release.
  • Proven Tough When It Matters: Fully anodized and tested for vibration, humidity, and extreme conditions.

Features to know about

Stop Freeze Damage Before It Starts

Water lines split open when they freeze. Batteries lose charge faster in the cold. Engines, pumps, and other critical systems might not survive those nights that fall below zero. That's exactly what this heater was built to prevent. At 600 watts, it has the power to keep medium-sized RV basements and boat engine compartments above freezing, and the forced-air design pushes heat into the corners where damage usually starts.

Added Flexibility with the Quick-Release Bracket

This kit includes a quick-release bracket, designed for RVs and boats where seasonal swaps matter. Instead of unbolting the heater in the spring, just pull the latch to release it and stow it away. When cold weather returns, drop it back into the bracket and it secures in place. The anodized aluminum bracket resists corrosion, so it can stay mounted all year without worry. Plus, the heater itself comes with a 15' marine-rated cord with a standard plug attached, so you've got some length to place it where you need (and you don't need to hardwire anything).

Thermostat Automatically Turns On and Off

You have better things to do than sit there watching a gauge. That's why the thermostat is fixed to switch on at 40ºF and shut down at 55ºF, which is the range that keeps your plumbing, batteries, and tanks safe. It's high enough to stop freeze damage, but it doesn't waste energy making it warmer than you need.

Ignition Protection Keeps You Safe

Putting any electrical gear in an enclosed space can make people cautious, especially around fuel. This unit is ignition-protected, which means it's been tested to make sure it won't ignite fuel vapors in engine compartments or bays. For boaters, that's critical for safety when mounting in the bilge. For RV owners, it means reliable operation even in tight spaces where safety standards really matter.

Specs

Application:

  • RVs and boats up to 28'

Electrical and Operation:

  • Wattage: 600 watts
  • Capacity: 2,047.3 Btus
  • Fan flow: 58 CFM
  • Fan MTBF: 40,000 hours
  • Typical operating current: 5.2 amps
  • Required fuse or breaker size: 15 amps
  • Startup current: 11.4 amps for 1 second

Dimensions and Weight:

  • Heater dimensions: 8" long x 3-1/2" wide 5-1/8" tall
  • Bracket dimensions: 8-1/2" long x 4-3/4" wide x 1-1/4" tall
  • Cord length: 15'
  • Heater weight: 4 lbs
  • Bracket weight: 1 lb

IP Rating:

  • IP68

Warranty:

  • Heater: 5 years
  • Bracket: 1 year

Notes:

  • If your boat is docked on a lift or trailer, you may need to consider increasing the wattage of the heater up one level to compensate for heat loss. Make sure to cover the fresh air vents to prevent air from escaping and the cold from coming in, resulting in a more efficient heater and saving you money.
  • Because boats vary in materials, insulation, and design, it's essential to carefully assess your specific needs and climate to determine the most suitable heater. In some cases, depending on the size and configuration of your boat, more than one heater may be necessary to ensure adequate protection.


XXHEAT-600 Extreme Heaters RV and Boat Heater - Heater for RV Basement - Medium - 600 Watts

XTRQRL-22 Extreme Heaters Quick Release Mounting Bracket for Boat and RV Electric Heaters - 600 Watts and 800 Watts - Aluminum

Installation Details XH77FR Installation instructions


California residents: click here


Ratings & Reviews

5.0

1 reviews
This heater protects your critical equipment from freezing in your RV or boat. It keeps those mid-size spaces at the right temp with an automatic thermostat. And the quick-release bracket lets you install or remove the heater when the seasons change.

by:

What stands out on the Xtreme Heaters 600-watt RV Basement and Boat Bilge Heater with Quick-Release Bracket (XH77FR) is how it fits right in between the small and large models, making it a solid choice for mid-size RV basements or boats up to about 28 feet. The quick-release bracket keeps seasonal swaps simple, since the mount stays in place and the heater slides in or out without tools. Once installed, the thermostat handles the cycling, and the forced-air fan pushes warmth evenly so medium compartments don’t end up with cold corners that cause freeze damage. The ignition-protected, anodized body holds up in enclosed or damp spaces, and the 15-foot marine-grade cord makes it easy to set up without hardwiring. For customers who feel the 400-watt might not keep up but the 800-watt is more than they need, this 600-watt size is the balanced option.


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See what our Experts say about this Xtreme Heaters RV Heaters

  • In Minnesota Winters How Can You Keep Boat Engine Bay From Freezing?
    Ron, in that climate, I’d recommend going larger. Even though a 26’ boat typically fits the 600W # XH77FR range, extreme cold can push it. The 800W # XH27FR gives you extra buffer. Do you usually leave the boat in the water, or is it on a lift during those cold snaps?
    view full answer...
  • Do I Need Individual Bilge Heaters For 24' Yamaha Crosswave Jet Skis In Covered Lift During Winter?
    Troy, each jet ski really needs its own protection. The 400W # XH67FR is usually enough for a single PWC. The 600W # XH77FR could cover a larger bilge, but with two separate skis you’d want one heater per hull. Covers will help retain warmth, but I’d still go with individual 400w heaters. Do your skis have shore power at the dock, or do you bring them home to plug in?
    view full answer...
  • Which Heater Is Best To Keep Bilge From Freezing During Winter On 34 Foot Carver Cruiser Boat
    Derek, the 800W # XH27FR is designed for boats up to 35’, but in a tight compartment with multiple engines and pumps, many owners prefer using two smaller heaters like a pair of 400W # XH67FR or 600W # XH77FR on opposite sides. That creates a circular airflow pattern and ensures no cold pockets. How is your bilge laid out - wide and open, or divided up around the engines?
    view full answer...
  • Will 400w or 600w Heater Work For Winter Storage In 25 Foot Bayliner Boat?
    Paul, that’s right in the middle sizing-wise. The 400W # XH67FR is rated for boats up to 24’, while the 600W # XH77FR is made for boats up to 28’. Since you’re at 25’, I’d lean toward the 600W for extra margin, especially if you’re storing on a lift or in harsher winters. If the boat sits in the water in a mild climate, the 400W could be fine. Do you normally see single-digit temps where you keep your Bayliner?
    view full answer...
  • Which Winterizing Heater Will Keep 26' Pocket Cruise Boat Warm On The Slip In Winter?
    Dana, the Xtreme Heater 600w # XH77FR is a great fit for boats right in that 24–28 foot range. Since you’re in the water and not on a trailer, the hull helps hold warmth, so the 600W should give you plenty of protection. If you were storing on a lift, I’d suggest stepping up to the 800W # XH27FR or adding a second heater. Do you usually get heavy freezes in your area, or just the occasional cold snap?
    view full answer...
  • How To Keep Boat Bilge From Freezing During Winter On 2022 Sea Ray Runabout
    Mark, the 400w heater # XH67FR is sized right for smaller single-engine boats like your Sea Ray, especially when it’s stored in the water. But since you’re keeping it on a trailer, the bilge will get colder and lose heat faster than a boat in the slip. In that case, Xtreme actually recommends either moving up a size to the 600W # XH77FR or using two of the 400W units for extra coverage. If you stick with the 400W, I’d at least cover your vents and outdrive to reduce heat loss. Do you...
    view full answer...
  • Is There A Heater To Winterize And Protect Freshwater Tank And Battery Compartment In 5th Wheel RV?
    Megan, it depends on how connected those spaces are. The 600W heater # XH77FR does move 40 CFM of air, but it only warms the compartment it’s placed in. If your water tank bay and battery bay are sealed off from each other, you’d need one heater per space. If they’re open to each other, the 600W # XH77FR is a solid choice for that size of load. Have you insulated the bays at all, or are they fairly exposed underneath the rig?
    view full answer...
  • Which Heater Is Best For Winter Storage Of 30 Foot Cruiser Boat On Lift?
    John, lift-stored boats lose heat faster than those in the water, so you’re smart to ask. The 800W # XH27FR is the recommended size for 30–35’ boats, but in lift storage, many owners either add a second 400W # XH67FR or 600W # XH77FR heater or go with two 800W units if the compartment is large. You’ll also help it perform by covering vents and outdrives to cut cold airflow. Do you have access to shore power on your lift, or do you rely on a portable generator?
    view full answer...
  • How Much Power Will 600W Xtreme Heater For RV Basements Draw During Winter?
    Jason, the # XH77FR 600w heater doesn’t run constantly. It only kicks on when temps dip below 40°F and shuts off at 55°F. So in practice, it cycles. At normal output, it draws about 5.2 amps running on 115V. The actual runtime depends on how sealed your compartment is and how cold your climate gets. Covering vents and insulating makes a big difference in reducing cycle time. Do you keep your rig in a barn or out in the open? That’ll affect runtime too.
    view full answer...
  • Does The Xtreme Heater For RV Basements And Boat Bilges Need to Be Mounted In Compartment?
    Lila, you’ve got both options. The heater 600w # XH77FR includes a quick-release bracket, so you can mount it securely and still pop it out tool-free whenever you want. Some folks do move one unit around, but for unattended storage I’d recommend mounting it in the most critical bay so it can’t shift or tip. Which compartment are you most worried about - your pump, your tanks, or your batteries?
    view full answer...
  • What Size Breaker Is Needed When Hardwiring Xtreme Heater 600W In RV Panel?
    Good planning, Scott. The 600W heater # XH77FR pulls about 5.2 amps while running, with an 11.4A startup surge, so Xtreme recommends a 15A breaker. That gives you safe overhead without nuisance tripping. If you’re running more than one heater, it’s best to give each its own breaker. Are you wiring this for a battery bay or a plumbing compartment?
    view full answer...
  • Can A Space Heater Protect My RV Fresh And Gray Water Tanks ?
    Jennifer, the Xtreme heaters are built to protect enclosed compartments like pump bays, plumbing manifolds, and battery spaces -not the tanks themselves if they’re hanging exposed under the RV. Many travel trailers and fifth wheels have black and gray tanks suspended outside, and in that case you’d need tank heating pads instead of a compartment heater. If your rig has an enclosed underbelly where all the tanks and plumbing are together in one large cavity, then the 800W # XH27FR would...
    view full answer...
  • How To Prevent Bilge On Boat From Freezing During Winter When On Lift - 27' Sailboat
    Ken, boats on lifts lose heat faster since they don’t have the water’s thermal buffer. The 600W heater # XH77FR will help, but Xtreme suggests either going one size up the 800W # XH27FR or using two heaters if you’re lift-stored. You’ll also get better results if you cover vents or even the outdrive to reduce cold airflow. Do you have shore power at your dock, or would you be running off a generator?
    view full answer...

Do you have a question about this RV Heater?


Info for this part was:

Employee Mary K
Edited by:
Mary K
Employee Daron K
Updated by:
Daron K
Employee Alex H
Updated by:
Alex H
Employee Andy C
Installed by:
Andy C
Employee Lincoln B
Written by:
Lincoln B

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