maximum dc voltage output Magnum 3012 with remote

If your battery is at or near charge capacity of 14v, your voltage will be regulated down from 15.4volts. If your battery was sitting at a lower capacity such as 10volts when you would see higher charging output voltage. This can usually be confirmed by using a volt meter while briefly disconnecting the positive lead from the charging source simulating a fully discharged battery. This would command 15.4v max charge. Running the charger like this for an extended time could cause damage.