My boat 12 volt system has 3 newer group size 27 all are dual purpose batteries that are wet lead acid. Now please I don't want a debate about what batteries are best. My system is in working order. During starting either port or starboard first my electronics drop out. Now I could start both motors up then turn on my electronics I know this. With all that said what's the best way to keep my electronics from dropping out when I start up the motors.