Choosing a 400W, 600W, or 800W Xtreme Boat Bilge Heater

Updated 10/23/2026 | Published 10/21/2026

Products Featured in This Question

Xtreme Heaters Boat Bilge Heater w/ Quick-Release Mount - 800 Watts - 15' Cord

$516.00

Xtreme Heaters Boat Bilge Heater w/ Quick-Release Mount - 600 Watts - 15' Cord

$466.00

Xtreme Heaters Boat Bilge Heater w/ Quick-Release Mount - 400 Watts - 15' Cord

$427.07

Question:

I have a 23 foot Sea Ray bowrider that stays on a trailer during the winter. I'm looking for a bilge heater to protect the engine compartment from freezing without having to winterize it every time we use the boat. Would the 400-watt Xtreme heater be enough, or should I go with the 600-watt? I'd also like to be able to remove it easily for maintenance.

asked by: Chris S

Expert Reply:

Hey Chris! I recommend the 600W Xtreme Heaters Boat Heater with Quick-Release Bracket # XH468FR for your 23' Sea Ray. The 400W model is generally suitable for boats up to 24 feet, but Xtreme recommends stepping up to the 600W when your boat is stored on a trailer or lift where it's exposed to more cold air.

These heaters have automatic thermostats, so they'll turn on when temperatures drop and shut off once the compartment warms up. The quick-release bracket is especially nice for your setup since you can remove the heater without tools when you need to work on the engine.

You can choose from the following based on your needs:

-400W Heater with Quick-Release Bracket # XH568FR

-600W Heater with Quick-Release Bracket # XH468FR

-800W Heater with Quick-Release Bracket # XH868FR

The 800W is better suited for larger boats and engine compartments. All three require 120V power, so you'll need a reliable shore power connection while the boat is stored.

Are you storing your Sea Ray outside or in a building?

expert reply by: Robin H

Boat Bilge Heater
(click to enlarge)

Chris

10/23/2026

Does the 600W heater need to be mounted directly under the engine, or can I install it off to the side? I have more room there and it would be easier to access.

Robin H.

10/23/2026

@Chris you can mount the # XH468FR off to the side as long as it's in the engine compartment and you maintain the required clearances. You don't need to position it directly underneath the engine. I would choose a location that allows good air circulation and gives you easy access when you need to remove it.