hello everyone I have two victron 12-12 30 amps chargers wired in parallel with fuses on the input and output. when I start the van they b both turn on then after about 2 mins one turners off because no detection of engine. the other will stay in bulk charge for about a minute then turn off then turn back on for a minute. I don't know if the problem is my alternator is to small or faulty victron product