Hi folks, the data sheet gives the start up voltage at 120v but operating from 80-450. My solar panels would be 3 x 320W in series with 38.05 voc and 31.58 vmp. Would the built in mppt fail to start/charge at these voltages? If so would adding a fourth panel work?Its for a caravan so space is limited but it may be possible to add a fourth panel. Thanks for any advice.