Hi, I am installing an off grid generator on my boat. I have three (3) 400W panels, planning to connect them in series. Each panel produces a max of about 40V and 10A. The wire run from my panels to my MPPT solar controller will be about 40 feet. My solar controller will be charging a bank of 24V LFP batteries. What wire size should I run from my panels to the controller? The calculators I’ve tried give me 6 gauge, but that seems like overkill, or isn’t it?