CA Traveler wrote:
Cut the Z bracket as close to the panel as possible. Reconnect the panel with angle aluminum and a bolt through the roof part of the Z bracket.
OK apparently your panels don't have significant length pigtails so you can't get to the connectors or perhaps a different wire routing. But I suspect that with the panels removed you'll find the problem.
BTW We should shoot anyone selling Z brackets or at least not buy anything from them.
Believe me, I will never buy one again! I bought a kit online from amazon. This is it:
https://www.amazon.com/Renogy-Watts-Volts-Monocrystalline-Starter/dp/B00BFCNFRMThen I ended up selling the controller and buying a tristar.
