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: 116

Latest Activity

Patrick Findaro posted a discussion

Leading ASP.NET Development Company

ASP.NET is a popular web development framework that is widely used by developers and businesses to build robust and scalable web applications. ASP.NET supports a wide range of programming languages, including C# and Visual Basic, which makes it a versatile choice for developers who are familiar with these languages. ASP.NET is designed to be scalable, which means it can handle large amounts of traffic and data. This can be a good choice for businesses that anticipate rapid growth in their user…See More
5 minutes ago
Patrick Findaro is now a member of SeaKnots
3 hours ago
Robert & Sandy replied to sam's discussion eyebrow salon window re-bed in the group Beneteau 40 & 43
"Hello all, I realise coming into this year old conversation could be somewhat strange though sharing advice is always beneficial.. Our B43 had her port large saloon window repaired under warranty after it developed a gap and obvious leak. The boat…"
Mar 12
dryfirewood is now a member of SeaKnots
Mar 4
zeehag left a comment for ___/)ances With Sails
"bubba died  but he seems tohave sent a nother special boy to me..a scared  confuzed precious  with name pusskins which i changed  to sir puurrcival pusskins.  much more refined name for such a precious furry one.  he is…"
Mar 3
___/)ances With Sails commented on LOLA's group SAILBOATS and SLIPS FOR SALE
"My boats for sale. Search Craigslist/New Orleans/S211_A"
Feb 22
___/)ances With Sails left a comment for Lola
"Happy belated holidays!  I'll email you. "
Feb 22
___/)ances With Sails left a comment for zeehag
"Karen!! Dang!!!!  How did Bubba use up 9 lives already? Sorry to read that, kid."
Feb 22
ADVERTISE ON SEAKNOTS CONTACT US AT: 
candrac@sailforwater.com

© 2024   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service