SeaKnots

B43 Battery Switch Questions coming up during my LIFEPO4 Battery Upgrade Process

My AGM batteries are getting a bit tired and I am swapping them out for 400ah of lithium, 2 - 200ah 'drop in' replacements.

My system has the 3000 watt inverter and Truecharge 40+ shore power charger which the boat came with and  I have verified with the battery manufacturer that these will work with the lithium (they said to set the shore power charger to GEL - WARM to get the right charging characteristics). I have also installed solar a few years back so will need to adjust the charging parameters of the Victron MPPT controller and I am installing a new victron DC to DC charger to protect the alternator.

The question I have is on the battery switches. My thought was that all charging sources would be on the "House" side of the switches so you can turn off battery power to the charge sources if needed. Since I see that mine is wired to have charging sources go to the battery side of the positive and negative switches, I have verified that both my new Victron DC charger and Victron MPPT charger controller have internal fuses, so I am a bit more comfortable installing the charging sources on the battery side of the switches.

However, when I had the negative battery switch in the off position, I tested it with the amp meter and noticed that both sides of the switch where grounded to the battery. It seems some dealer installed ground wires go directly to the battery side of the negative switch which may be inadvertently grounding the entire system. 

So 2 questions to the group:

1) is your charger installed on the "battery" side of the switches?

2) Has any one else experienced the Ground Switch issue described above? Any reason to have anything besides the charging & battery ground wires on the battery side of the switch?

Views: 82

Latest Activity

Mike Brown replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"CAEA5280-4642-4EB0-A37A-056724ADE37C.mov"
May 17
Mike Brown replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"Wayne, yes I'm still out here. She's looking good and you'll love her. The 38.1 is a perfect size for 2 people with occasional guest (s). Plus she's a sweet sailing boat. I'll attach a short video of one I was delivering…"
May 17
Wayne replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"Mike if you’re still out there here is the new boat before commissioning. Should splash by end of this week after 14 months of anticipation! Wayne"
May 17
John Hanrahan liked sam's discussion eyebrow salon window re-bed
May 12
John Hanrahan replied to sam's discussion eyebrow salon window re-bed in the group Beneteau 40 & 43
"Sam, I am just in the process of replacing both of my eyebrow windows.  I have the new ones from Beneteau and am talking with dealer in Florida re Bebeteaus advice. It would be helpful to talk to you about your experience. I have never seen…"
May 7
John Hanrahan posted a blog post

Cabin eyebrow windows

Good morning gang,I have received both port and starboard cabin windows from Beneteau for replacement as the existing leak and are badly etched. Beneteau has referred me to the dealership for installation but I'm having trouble getting a response.   Does anyone have any experience replacing these and any recommendations. JohnSee More
Apr 28
Kerim N replied to Randy Brown's discussion Beneteau 40 Black Mesh Window Covers in the group Beneteau 40 & 43
"Hello Randy, New to the group, going through the posts, I have come upon this thread.  I was considering tinting my windows of my Beneteau 43 with a darker tint, but I really like your idea.  So I will copy with…"
Jan 6
Kerim N joined CAN DRAC's group
Thumbnail

Beneteau 40 & 43

A place to exchange thoughts, ideas and discussions about the Beneteau/Oceanis 40 and 43 models.
Jan 6
ADVERTISE ON SEAKNOTS CONTACT US AT: 
candrac@sailforwater.com

© 2022   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service