My solar panel has kept the battery between 11 and 13V right through the summer. I have just reconnected to mains and notice the Nordellectronica NE 102C panel no longer says 230V when I am plugged in. I have checked all obvious fuses. The charger I believe is a btcina C16, at least this is the box on the other side of the mains inlet socket. Any suggestions very gratefully received.