I'm at the point where I'm doing the final wiring. I was planning to use two golf cart batteries but got a great deal on Rolls 415 AH AGM. A local company that does oilfield solar projects had a bunch that were lightly used from a big job. Luckily they fit where I planned to put the GC2's! The guy there was real interested in my truck and gave me a great price and a lot of good advice.