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.