Lightharvest Solar has officially entered the age of LITHIUM, and we're never going back. We just decommissioned our huge, trusty, 650 pound Lead Acid battery bank that powered our off-grid showroom, and replaced it with a lithium bank. Made with 4 CALB CA180FI, 3.2 Volt, 180 AH Lithium Iron Phosphate (LiFePO4) cells http://www.lightharvestsolar.com/catalog/item/8735074/10310342.htm, Wired in series, it makes a "12 Volt" battery which weighs about 55 pounds. Absolutely incredible performance, particularly with regard to discharge rate (360 Amps for the CA180FI, which seems to be about 6 times better than AGM batteries.
That's the magic with these, such a high discharge rate allows us to power bigger loads with a much smaller, lighter, battery, plus get a lifespan 4-5 times longer. The significance of this, with regard to off-grid power systems, cannot be understated.
There are other enormous advntages, the biggest being that they are very light so if you are in a RV, you now can enjoy many of life's electrically powered pleasures that were impossible before, think microwave, coffee pot, toaster, hair dryer, hot plate, etc.. If you have the solar panels to recharge it, even air conditioning should be possible.
This is going to be big, very big! -PLEASE NOTE THIS PACK DOES NOT HAVE A BATTERY MANAGEMENT SYSTEM, DO NOT DO THIS! We are doing a test and monitoring the cells closely for an out of balance condition. ALWAYS USE A BMS.