I re-read these posts and realized you thought I had a dc-2dc charger. Here's what I have: 400w 12v (4x100)PV, Renogy Rover 40a SCC with provided tray cables (8awg), a 12v 200ah Lifepo battery, 9" 4/0 cables from battery to 300a ANL fuse to 2200w Giandel Inverter with the provided 5awg cables...