My boss bought a pallet of these from an auction. I bought 2 of them off of him. Is there a good beginners guide to solar? I have googled the model # (Siemens SP150-CPL) and have not been able to find any info on them. I my goal is to make a frame out of aluminum channel & the plastic fittings and mount it to my trailer. I can't even figure out how to test them.