I just got 2 sets of panels both have a Solarex SRO12150 box. the is NO instructions and the seller has no clue. panel #1 is Solarex msx120, panel #2 is three sx38 hooked up as one panel. Questions how much power(amps) can these boxes handle, Can I run both threw the same box, how much power will these put out? A note inside the boxes says set at 14.4 volts. Thank you for any help. I used search but got no hits. Oldculett