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Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.
Peter Kennedy has been in  business since 1991 designing, installing and servicing marine electrical systems. The purpose of this blog is to offer support to both professional installers and  do-it-yourself boat owners who wish to undertake this work themselves.

How big a battery bank do I need?

Posted by Liam Kennedy on 1/18/2019
For most people to answer to this is "as big as possible".  Charlie Wing's book the "Boatowners Illustrated handbook of Wiring"  has a very good explanation of how to calculate the capacity you need. The calculations start by working out what your daily load will be both at anchor and while underway.

Should I hook up batteries in Parallel or keep them in separate banks?

Posted by Liam Kennedy on 1/18/2019 to Batteries (Conventional)
There may be some disadvantages to hooking up batteries in parallel but there are also considerable advantages. The main disadvantage as I see it is that as the batteries get old one will fail first, quite often by getting a shorted cell.

How do I charge two battery banks on my boat and still keep them separate?

Posted by Liam Kennedy on 1/18/2019 to Batteries (Conventional)
The simplest way, if you can remember to do it, is to turn your battery switch to "BOTH" when charging, and turn it back to 1 or 2 when you are finished.  This solution is unsatisfactory for those who sometimes forget and then end up with a flat battery from time to time.

Using Victron Energy equipment with other brands of Lithium Ion batteries

Posted by Peter Kennedy` on 1/14/2019 to Batteries (Lithium Ion)
Victron Energy offers a suite of equipment for use with their own brand of Lithium Ion batteries. Can that same equipment be used with other brands of batteries? See here what works and what doesnt.......

Upgrading the Firmware in your Victron MultiPlus or Quattro

Posted by Peter Kennedy on 1/2/2019 to Victron MultiPlus and Quatro
This Blog post explains why you might want to update the Firmware in your MultiPlus or Quattro and how to go about it