I would appreciate help trying to understand out battery
situation. Here goes...
We have a 2003 Lagoon 380
GM30F engines. The alternators and regulators are the original OEM installs. We have approximately 800 hours on each engine
We upgraded the batterys last year when we bought the boat. Installed 3ea AGM
4D (205amps ea) for the house battery
bank and AGM
27 series for each starting battery.
Additionally, we installed a Xantrax TruCharge 2 40amp battery charger
and a Xantrax 3000 watt inverter
The boat already had a Norpro 7KW Yanmar generator
Things just don't seem right. We are down in the Bahamas
. The mechanic
we had looking at the systems seems questionable on his expertise.
I am trying to understand if we have a problem.
We also have a BlueSea 3-position battery gauge at the nav station.
When we charge the batteries everything reads properly on the Xantrax remote
station - no fault lights. The settings are set for AGM batteries and the temperature setting is for warm weather
(middle setting). The Blue Sea readout during the initial charge starge is about 13v for the house bank and 13.2-13.3v on the start batteries. It falls some as the charger
goes through the cycles and finishes in the float stage.
When we shut down the generator
, the house bank reads 12.5v and the starting batteries 12.7-12.8v. Is this the proper reading, or is it too low?
We are running a 12v fridge, a 120v 2.4 cu ft Waeco freezer
(at a low setting), led cabin
lights, vacu-flush heads, sometimes a computer or two, sometimes a tv, plus mooring
light at night. We are down to 12.0v in the morning. Should we be going down that quickly? How low should the voltage reading be before we recharge? What is the voltage reading that we do not want to go below?
1. Are are we getting a full charge at 12.5v, and how do we know other than the Xantrax remote panels
indicates everything is OK?
2. Does the battery discharge seem to be in line with the appliances
that we are using?
3. Do we have too much battery capacity for the OEM alternators, or the 7kw generator? Does the TruCharge 2 manage this?
I realize that I am asking for a lot of information, however being down in the Bahamas
(Nassau) we are at the mercy of unknown boats mechanics and I don't want to have them start replacing batteries, alternators, voltage regulators, generator repairs
unless it is truly necessary. Any advice, and prayers, will be appreciated.
Also does anyone know of a honest and capable mechanic
that can help?