Welcome to Carver Yachts Owners Forum
We are a boating forum for owners of Carver Yachts to enthusiastically discuss all aspects of Carver Boat ownership. Whether you are looking for your first Carver or currently own one, you are sure to feel at home on CarverYachtOwners.com
You are currently viewing our board as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to searching the forum topics, post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
battery management switch
- SkyeToo
- Scurvy Dog
- Posts: 19
- Joined: November 7th, 2017, 2:43 pm
- Vessel Info: 1989 36' aft cabin, galley down
full upper and aft deck canvas - Location: Ontario Canada
- Has thanked: 6 times
- Been thanked: 4 times
battery management switch
in aft cabin closet is the 1,2,ALL battery management switch.
tested engine start in all 3 positions and yup, engine started - this is wrong!
gennie works fine, all power, lights, etc. 12v and 120 work fine
all batteries charge perfectly underway
battery charger is relatively new and works great, all LED's show correct voltage levels
BUT house batteries (brand new) drain much too quickly (4-5 hours)
woken up at 3am to the warning screech too many times.
my guess is that the battery switch is either bad or incorrectly wired for some odd reason
the starter and house batteries should be isolated by that switch, right?
engines should NOT start in the "2" (house) position, right?
spring plan is to replace the switch and trace the connections to the battery group and charger
BUT I don't have the electrical schematics for that model. Could someone send me link to the PDF's or some such?
Bruce
PS - love this boat- 7th season coming up. handles nasty weather on Georgian Bay no problem.
- Midnightsun
- CYO Supporter
- Posts: 2940
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 270 times
- Been thanked: 1157 times
Re: battery management switch
- bud37
- Admiral
- Posts: 4912
- Joined: April 23rd, 2015, 10:22 pm
- Has thanked: 583 times
- Been thanked: 1225 times
Re: battery management switch

-
- CYO Supporter
- Posts: 6015
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 457 times
- Been thanked: 1684 times
Re: battery management switch
When you say the bank only lasts 4-5 hours and you get woken up at 3am, are you saying that you get to your anchorage at 10-11pm and that's when you start tracking how long the bank lasts or are you getting to the anchorage in the morning and running the genny periodically throughout the day to charge the batteries?
Have you checked to ensure all battery connections are in good shape, clean and tight, and that all the wiring is hooked up as it should be? Have you taken proper readings at the batteries to ensure they are fully charging? What brand and model charger do you have? What voltage do you get at each bank while underway?
It would be helpful to know about any additional hardware hooked up to the batteries that was not factory. For example; where is the "screech" coming from? Is there a low voltage warning device of some sort or perhaps an inverter?
- g36
- Admiral
- Posts: 2022
- Joined: April 7th, 2014, 6:07 pm
- Vessel Info: 1997 Carver 405
- Location: Soddy Daisy TN.
- Has thanked: 7 times
- Been thanked: 618 times
Re: battery management switch
Crusader xli
The Black Pearl
Soddy Daisy Tn.
- km1125
- Admiral
- Posts: 3517
- Joined: February 28th, 2017, 6:04 pm
- Has thanked: 71 times
- Been thanked: 1053 times
Re: battery management switch
What kind of batteries do you have? How old are they? What do you typically leave running on battery when you're on the hook?
With a weaker battery (not bad, just older), some heavier loads (like the fridge and a few non-LED lights and some other stuff), and some resistance in the line caused by a corroded connection or two, your voltage to the device alarming may drop below the threshold. What is causing the "warning screech"?
- SkyeToo
- Scurvy Dog
- Posts: 19
- Joined: November 7th, 2017, 2:43 pm
- Vessel Info: 1989 36' aft cabin, galley down
full upper and aft deck canvas - Location: Ontario Canada
- Has thanked: 6 times
- Been thanked: 4 times
Re: battery management switch
First, all the batteries are brand new last July. 2 deep cycle house, 1 ignition, 1 genie.
The marina tech's told me a couple years ago that the switch was mis-wired - 2 being engine start, 1 being house. (backwards)
But that seems very difficult to confirm. I have tried all configurations. Yes, switch is in the "All" underway to ensure full charging (works fine).
Fridge only from say 9-3/4 am should not deplete the 2 deep cycle batteries which made me wonder if the switch was even working. Engine start battery also low overnight (can always start the boat with the genie charge if needed)
The screech comes from the upgraded charger unit - a low-battery warning signal in the unit. Not a bad think to have.
So all this makes me think there may be old corroded wiring that is at least part of the problem as I don't leave lights on overnight. (anchor light is an LED - draws nearly nothing). Ice maker off. Stereo off. In fact, I have even shut off many of the services (other than fridge) from the breaker panel to be sure no current is being drawn.
I still don't see why all 3 positions (1,2,all) permit engine start unless the engines draw from the starter battery regardless of the switch position.
Just can't see why with new charger, batteries etc I should have a low-voltage warnings after 6 or so hours.
Again, many thanks.
Bruce (Midland Ontario)
-
- CYO Supporter
- Posts: 2310
- Joined: March 28th, 2016, 10:52 pm
- Vessel Info: 1998 Carver 355
Suspicious Fishes !
2022 Kawasaki 310X - Location: upper chesapeake bay
- Has thanked: 324 times
- Been thanked: 595 times
Re: battery management switch
- bud37
- Admiral
- Posts: 4912
- Joined: April 23rd, 2015, 10:22 pm
- Has thanked: 583 times
- Been thanked: 1225 times
Re: battery management switch

- Midnightsun
- CYO Supporter
- Posts: 2940
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 270 times
- Been thanked: 1157 times
Re: battery management switch

Who is online
Users browsing this forum: No registered users and 14 guests