[PNW Fireguy]

Be sure to take into account temp correction when determining how many panels to put in series. My PV strings total just under 150V without temp correction however dependent upon how cold the weather turns where I am they could potentially put out 187Vdc which would have damaged a 150/100. Over paneling also seems to be the IN thing right now as well. Your controller is plenty big enough for the current. As you stated it's the panel configuration and the resultant array voltage that's limiting. I have the same issue. I have a pair of 250/100 in a 24v system. As per my previous post you will want to make sure that your panels have bypass diodes. They block the shaded panel while keeping the unaffected panel in series output functioning.