I am in darwin and the wet has well and truly started with a cyclone giving the town a Xmas scare before missing us. However, when I was at the
boat tying everything down on Xmas eve I noticed that the Xantrex
battery monitor was showing a low voltage
alarm & 6.7V However the DC
monitor that comes with the switch board shows 13.7 V Up until a week ago they would both read the same voltage. The Xantrex shows that the
batteries are 92% full. When I plud the
dock charger in it only puts in 5amps. So I think that the house
batteries are nearly full.
The house bank consists of six
AGM 6V batteries in series and parallel. There are also
AGM starter batteries , one for each
engine linked into the system with VSR voltage sensors. All batteries were new 4 years ago. None of the main
fuses are shorted. I tested the house bank. Each 6v
battery tested at 6.7 volts (the same as the xantrex is now reading) and the whole bank tested as 13.7V (the same as the
control panel ammeter is reading)
Any ideas as to the cause of the low voltage
alarm? Thanks for your help.