This kit is usually about $850 on amazon but is on sale for $530 right now. Buy two more panels to get you to the 600 watts and your good. I have been watching it for almost a year on amazon. This is the cheapest I have seen it.
Renogy 400 Watt 12 Volt Off Grid Solar Premium Kit with Monocrystalline Solar Panel and 40A MPPT Rover Controller/Mounting Z Brackets/MC4 Adaptor Kit/Tray Cables Fuse set /MC4 fuse https://www.amazon.com/dp/B07CTKT56Y/ref=cm_sw_r_cp_taa_yO3kEb039328N
Hopefully the link works......I have not posted a link before!
