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Two quick (probably dumb) questions: 1. My new MPP Solar inverter/charger 3KVA 24V has a different AC output interface from previous models (shown in all the instruction videos). Instead of three lugs for positive, neg, and neutral, it simply has 2 traditional AC wall plugs on the side. My...

I built my 24 V battery from 16 x 3.2 V 90AH Littokola batteries . It tested at 25.9 v. Then I plugged the DC cable into the bottom of my new MPP unit. You can't mistake polarity on these new ones the cable only goes in one way with red plugging into red and black plugging into black. Next I...