So I currently own a small 200watt solar set up and just yesterday corresponded w/a guy going bye Alexander on Renogy's ebay page who told me I could NOT run 2 separate arrays on a single battery bank both using their own charge controller. Well, Alexander is very wrong because I have done it before successfully and then another person at Renogy going bye Ian said I was in fact correct. Also, $105 per 100w panel on eBay and $85 on their site so pay attention folks. In the end Alexander was simply trying to up sell me to a control module 4x the price which failed. In the end I did send them links to videos etc. of folks who have used dual arrays on a single battery bank w/success. Products are good generally speaking, but wanted folks to be aware of their shady tactics imo.