I just finished testing my four Nature Power 215W solar panels that I bought from Home Depot for $154 each. I'm in Akron, OH, so fairly far north, and it is Feb 1st, so I wasn't expecting much. Using a Victron SmartSolar 100/50 controller with the panels in a 2S2P config, I got up to 688 watts out of the "ideal" 860W. I'm pretty happy with that given the time of year. I hope to do a good bit better in the summer when I'm actually camping. I did have to cut off the SAE connectors and put on MC4. Wire is only 14 gauge, but I was able to put on the MC4 connectors with my crimper really well and it all worked fine.