[rames14]

WhatExit -
You can download the manuals from here in the files section for the components. When you purchased the Solar Flex, you must have had some idea of what you wanted to run (TV, Coffee Maker, Residential Fridge?). You can find the amp ratings for those items by searching. Then, once you know how much you need, choose your batteries accordingly. One thing Solar Flex doesn’t come with is batteries. You will get much better performance with Lithium batteries. They charge much faster and you will find they hold voltage as they discharge, unlike lead acid and AGM batteries. Also, the rule of thumb for lead acid batteries is 50% of the ah rating is usable. My old unit with a Bogart meter showed my voltage dropped below 12v before I was at 50% discharge. Hope this gets you started. You may want to start a new post with specific questions. Lots of people here with lots of knowledge.