My boat has a battery charging
system that consists of a Xantrex TrueCharge20 charger
, a Xantrex PathMaker battery
combiner and a dual solar
system with one ProStar-15 controller charging
the starter battery and a Blue Sky Solar
Boost 2000E charging the house and aux battery bank. There are 5 AGM
batteries 2 house, 2 aux and one starter.
Normally the boat is connected to shore power
when not being used (I sail mostly on weekends) but In August I sailed to Captiola CA and left the boat on a mooring
for 4 weeks. During this time the solar was maintaining the battery charge adequately (mainly powering the refrigerator) and she was not connected to shore power
However when I sailed home (back to SF bay) mostly under power, I discovered that the batteries were not charging from the alternator
(a 100A Balmar).
All of the equipment
is around 5-6 years old (I've had the boat for 2). It has all worked well until now.
I have two questions. First, is there a device that switches the charging current
to the house batteries, or are all supposed to be contributing to charging at once? Second, is this likely to be a problem in the alternator
or in some device that switches the source of charge (if so, what device and how to test?)
I would appreciate any advice, as I am obviously not an expert, but would prefer to learn than to just call my mechanic