Ever since I installed my D10 EMS I'm getting a little drain on the battery. Lose .2 volts in a few days. Is it possible it's the EMS or just coincidental? I don't have any 'keep alive' wiring installed as it is connected to the GPS and D10A.
Which side of the master switch is the amps shunt on? If the shunt always has power on it, it will draw a few mA.
At the same time, 0.2V is an amount that needs to be qualified, as that is pretty normal if you check right after shutdown and then days later after the battery cools and relaxes.