I have an IP67 connected to 2 12v batteries. Today we swapped the batteries and also updated the firmware via the app. Initially the update failed so we wound up using a different phone and the update went through. We are now finding however that the batteries are only charging to 16v not the 24v it used to.
Hi
So i wasn't onsite to look at this and following a visit i think that there was some communication confusion. The measurements they were taking were from a voltage divider circuit which then fed into a +10v analogue card which was then wirelessly transmitted to the readout.
The trouble is that this voltage divider and the power to the wireless side were all on the output side of a DC-DC convertor which has a shutoff voltage of.....16V! Therefore actually they were saing a value held in the buffer before the wireless shut down. A quick investigation with a multimeter revealed it all and that actually the charger is fine.
Sorry to have started this without all the info.
