We have two caravans set up identically with a single 150w solar panel connected via a Smartsolar 75\15 controller to a single 150ah AGM battery. Both worked flawlessly since being installed a few months ago. Reciently both batteries were disconnected at the battery when some gas work was being done.
Now one caravan shows voltage at the panel and into the battery, but zero W solar and no amps at panel or into battery, and no charge having gone to the battery since it was reconnected. I tried disconnecting the solar panel and battery and reconnecting them in the correct order but made no difference.
The second caravan shows the same, while the history indicates it has been charging since it was reconnected, and unlike the first caravan after a load has been applied it operates normally in bulk, but then the serious appear as it switches to float. I did not try disconnecting solar ect. as I did above.
Neither caravan has ever spent any time in absorption, but we haven't had any real drain on the battery as they're just being finished so I'm putting it down to that.
I'm stuck.... What can I do?