I have 3 MPPT 100/20, each on a different solar array. Two of them operation normally. They wake up in the AM and start working and communicating over bluetooth and the VE.Smart network. The 3rd wakes up but will not communicate until I reset by removing PV and Batt power. Then all is fine on this unit until the next AM. I've reset this charger many times, tried taking it off the VE.Smart net too. I have the arrays set for 12V, not 24 volts. This AM the uncommunicating controller had 13.4V Batt and 21V from the array and was showing steady GREEN, bulk charge. Using the BMV-712 it appears all the chargers are working, but, the one will communicate without being reset. Any hints or ideas?