Hi OzSprinter
did you purchase these units from a BCF / Rays outdoor store ? and if so what state are you located in ?
will await your reply
Regards
Brett From ARK
Interesting question? Did different units go to different locations?
I left my ArkPak's turned off for 24hours. Turned them back on this morning, they seem to run correctly, 3 hours later, they were back on Alarm (Open Circuit)
Rang a friend that purchased an ArkPak before i purchased both of mine, and asked him what he does, he said he suffered the same Alarm fault when left plugged into a mains power. So he just leaves it turned off now, he got sick of resetting it. He has the same 100Ah battery too.
He has used his ArkPak more then i have, taking it on a 3 day camp, running a fridge and charging everyones phone, which he was very impressed with, came home still with 85% Charge with no power going back into the unit.
So it seems what you are suggesting may resolve the Alarm for a while. I did take my battery's down to 20% once after a long duration unplugged.
Which concerns me, as i had been told NOT to take a AGM battery below 50% as a habit, and if i did, for it to be for a very short time frame.
But once the ArkPak's have been plugged back into mains and left ON (Charging) for a period of time, this Alarm is re-occurring.
If this helps in any diagnoses, the Alarm Fault is worse now then when they were new, as in, now it happens all the time.
Units were purchased in Melbourne.
Thanks