For folks who have not bought new batteries yet but are looking at this thread for advice I have revised my thinking based on exchanges with Rando. See edits to my previous comment #7 to this thread. I am now convinced one can routinely use 50% or so DOD on high quality AGM and 80% DOD on LiFePO4 assuming appropriate charging and temperature environment.
Given daily power needs up to around 45 - 50 Ah, if I were doing my battery shopping now I would be looking hard at high quality12 V AGM 100 - 125 Ah (group 31) such as Lifeline, Trojan, Dekka which cost around $250 - $300 and weigh around 60 - 70 pounds or 12 V LiFePO4 80 - 100 Ah battery such as Battle Born which cost around $800 - $900 and weigh about 30 - 35 pounds (or even a DIY LiFePO4 battery for around $300 ==> see Rando's post). All this written, I don't think there is much margin built into these numbers so if you camp in a place where you may not be able to routinely recharge your batteries everyday and you have needs in the 40 - 50 Ah range then you may want to have more capacity than 100 - 125 Ah.
Apologies to anyone who may have made a purchase based on my earlier pre-revision) comments and are now reading this and shaking their heads.
Regards,
Craig
Edited by ckent323, 11 November 2017 - 08:38 PM.
