BFL13 wrote:
I am running two 20a controllers, each with its own array (one 200w, one 130w) in parallel on the one battery bank. No issues. So you don't need the 40, just another 20 and then no confusion over tracking points.
Another advantage is versatility. I can split the banks or combine the systems on the inverter bank under heavy use.
As for fewer features. I just need to keep the batteries charged day to day for a week or two at a time. I want to believe the three stage charging of the controller where I can control the voltages is better than a few hours a day with the generator running the 55 amp 13.6v convertor.
