First Impressions of EG4 LL-S Lithium Battery!

Here is a first impressions video of the EG4 LL-S Lithium Battery. We are really liking these as a system for off-grid homes, cabins and offices! Check them out at www.lightharvestsolar.com

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To properly test this battery you need to tear down the BMS down to the component level and check the caps and FETs for their country of origin. If they're made in China. you can count on a shorter life expectancy than FETs and caps that are US or European made. Another test to perform is a cell impedance test to confirm whether or not the cells have been matched. We use a $6,600 Fluke BT521 advanced battery tester when testing for cell impedance. Another thing to consider is whether or not the BMS offers active cell balancing. If it does not, then as the cells age, and their individual impedance changes, you can expect a substantial capacity loss over time. Another thing to consider before buying this battery is the fact that for only a few hundred dollars more than what this battery sells for, you can easily DIY build a 48 Volt 300+ Amp hour (three times the capacity) battery with display, low and high temperature sensing and active cell balancing.