Click for JetForums Click for Delta Click for Nordhavn Click for Walker Click for Burger

BW 350 Outrage thruster wiring

Discussion in 'Technical Discussion' started by Pascal, Apr 24, 2026.

You need to be registered and signed in to view this content.
Page 2 of 2
  1. Pascal, May 24, 2026
    #21
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,880
    Location:
    Miami, FL
    Well since MM replaced the thruster with a 12v unit, the issue of the 24v bank is moot. I thought about installing a 12 to 12vdc Victron charger but there is virtually no way to run the wiring from the stern where the batteries are located to the bow. BW installed a wire chase but it is completely full
  2. Capt J, May 24, 2026
    #22
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,854
    Location:
    Fort Lauderdale
    How was the bow thruster getting charged to begin with? You can run the wires, I'm sure there is a way without an additional wire chase. Under the gunnels, etc......
  3. Pascal, May 24, 2026
    #23
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,880
    Location:
    Miami, FL
    Originally the thruster was 24v only charged with a battery charger… but then marine max replaced it with a 12vdc version and didn’t replaced the charger.

    I haven’t found a way to run wires because forward of the aft compartment where the batteries are is the fuel tank under the helm seats. Outboard of that are two fish boxes which are not removable. No way up or
    Down to the gunnels. All sealed. Lousy design
  4. Capt J, May 25, 2026
    #24
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,854
    Location:
    Fort Lauderdale
    THERE is always a way to run power from the stern to the bow or access it on a Boston Whaler. The people you are using simply don't know how to look and how to route things. You get to the gunnels from the stern on that boat and over. The speaker wiring is all run outbound of the stringers. If you wanted to island engineer it you could tap onto the windlass wiring and put a Orion XS 12 to 12v DC to DC charger where you can limit amps being charged.
  5. Pascal, May 25, 2026
    #25
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,880
    Location:
    Miami, FL
    Doing it myself… I have very limited trust in “people” as evidenced by the switch to a 12v thruster…

    this boat has very limited access to anything

    i didn’t think about using the windlass wiring as a power source for a DC-DC charger. Good idea. Thanks!
  6. Capt Ralph, May 25, 2026
    #26
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    Wait a minute; There is a 12V windlass up there??
    Why was this not on our list of assets to begin with?

    Reminds me of our favorite movie;
  7. Capt Ralph, May 25, 2026
    #27
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    Just help me get up on a good page;
    Where is the 24v charger?
    Where is the 12V charger?
    Now that we know a 12v windlass is up there, where does it get it's 12v from?

    Don't throw the 24V charger aweigh. I'm using a 40 year old Raritan 24v charger/converter for a bench power supply.
    My back aches every time I think of picking it up off the floor.
  8. Pascal, May 26, 2026
    #28
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,880
    Location:
    Miami, FL
    The 24Vdc charger is under the floor near the thruster batteries. No longer working since Marine Max changed to a 12v motor and rewired the batteries. I already ordered a 12V ProMariner to replace it

    windlass gets power from the house / center engine bank (two batteries) which is charged by a 12v charger which also charges the port and starboard start batteries.

    now I have another mystery to look into. There are two remote parallel switches to parallel either port and house/center or stbd and house center. For some reason, both parallel switches click back on after like 10 seconds of being turned off.

    I m really not impressed by the electrical system on this boat. For instance yesterday one of the Raymarine Axiom MFD froze up. I couldn’t find any individual CB to reset it and had to use the main breaker that powers all the electronics. Zero redundancy.

    and they used breakers where you have to use a very thin screwdriver to turn off. Lousy design
  9. Capt Ralph, May 26, 2026
    #29
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    We will be back down your way in July.
    I always have hammers on board.
    You need me to come by and fix these things for you?
  10. LenR, Jun 8, 2026 at 10:03 AM
    #30
    LenR

    LenR New Member

    Joined:
    Jan 13, 2026
    Messages:
    29
    Location:
    Long Island
    Witch is better for 24v, 2 - 12v batteries together or 1 - 24v battery? And for charging can a 2 bank 12v charger be used for each 12v battery or a 24v charger for the 2 - 12v?
  11. Pascal, Jun 8, 2026 at 12:18 PM
    #31
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,880
    Location:
    Miami, FL
    I ve never seen a 24 v battery. I don’t think such a thing exists

    yes you can use a two bank 12v charger, not sure why you woudl do that though.

    I have a 48v bank for my little sailboat and uses 4x12v ProMariner charger, each output connected to a pair of 6VDC golf cart batteries.
  12. Capt Ralph, Jun 8, 2026 at 12:47 PM
    #32
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    Series vs parallel could be a part of your answer.
    Do you require volts or amps to run what you are inquiring for?
  13. Capt Ralph, Jun 8, 2026 at 12:50 PM
    #33
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    I recall some of the fancy lithium batteries come in a single 24v case.

    I maintain a big Hatt with a WesMar 48v (4 x 12v) bow thruster.
    It has a 48v charger.
  14. LenR, Jun 8, 2026 at 4:45 PM
    #34
    LenR

    LenR New Member

    Joined:
    Jan 13, 2026
    Messages:
    29
    Location:
    Long Island
    It is supplying a 24v bow thruster. No charger was installed. There are 2 dead 12v batteries there now that need to be replaced and a charger put in.
  15. Capt Ralph, Jun 8, 2026 at 7:30 PM
    #35
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    14,402
    Location:
    Satsuma, FL
    Pascal just learned his 24v thruster is really a 12v model. Seems some meat heads really messed up the previous owner.

    It is strange that you have a thruster with NO charger.
    If you have a 24v boat, I would look for a ACR somewhere that tied your thruster batteries to the ships charging system or ships batteries.

    On a thruster, your looking for power, amps, current, watts. Really fast and hard. High current batteries, fat battery cables.
    Two high current 12v batts in series (G31s) should work fine.
    I'm not sure the lithium 24v packages will deliver the high current your thruster can demand. But I am not a lithium guy (can't afford them).

    Now for a charger.
    Fast current out, fast current needs to go back in, preferably with a temp probe since your charging in a confined space (small bow area?)
    Not a trickle or cheap bench charger. Pro-Mariner and above will be required with fuses and PROPER 120Vac wiring.
    I luv spending Other Peoples Money (OPM) but you will thank me once your credit cards are paid off.

    Your north of the line. If you need help, get down to Jax FL.
    We can fix you,,,,, and your boat ☺☺..
  16. Capt J, Jun 9, 2026 at 12:45 AM
    #36
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,854
    Location:
    Fort Lauderdale
    Most all of the lithiums, the BMS will not allow them to put out enough amps for a long enough time for a bow thruster. Won't work. A 2 bank 12v charger actually does a slightly better job at keeping each individual battery charged correctly, but a 24v charger would work fine also. SOMETHING has to charge your bow thruster bank.
Page 2 of 2