HQST12 Volt 100Ah LiFePO4 Lithium Iron Phosphate Battery, Built-in Optimized BMS with Low & High Temp Protection, Series and Parallel Connection, for RVs, Boats, Solar System

came in great packaging. had issues setting up charge controller as the seller would not respond to contact requests for proper settings for these batteries with a midnight solar classic 200 charge controller. have had to reactivate these by momentarily hooking up to a regular gel battery more than once as their internal controls shut off.

Bought two of these for my first off grid setup in our travel trailer. Have used it once boondocking for a week with solar and generator charging. On some long travel weekends it'll last multiple days if I remember to actually turn off the inverter.Considering buying a 3rd battery. It's just hard to time the shipping since we move sites almost weekly. Wish Amazon would stock these as Prime items instead of waiting on HQST to ship and FedEx to do their thing.I like they provided longer bolts, which I needed for 2 lugs. Biggest gripe would probably be the raised edges on two sides of the terminals, this limits how you can face the wiring.

Battery lasted one cycle. Dropped down to 6-8 volts.

There is extreme slop in the bolts when trying to install the battery.Will need to rethread now that they stripped out. Not a simple task.Wish I had gone with something better or built my own.

Installed with 100 watts of solar panel thru mppt controller always charged to 100%capacity still powering my remote trailr after6 full days of rain about 8 hrs of partial sunbrings it back over14 volt charge super happy it works good

Have my rig set up for 400 ah. So far the batteries are holding a charge at 0.1 volts different when fully charged.

UPDATE: After using them for one season one of the batteries is still functional and will charge/discharge normally, but the other appears to be in disconnect at the BMS, reads 0V, and will not take a charge.I used one of them last year just for DC loads while camping and only once ran it down to around 10V after accidentally letting the refrigerator run over night on battery power only. It charged back up without any issues. I bought another one and have connected a 2000W Renogy inverter to the two HQST 12V 100Ah LiFePO4 batteries using the supplied cables with the inverter and a pair of 4g battery cables to parallel the batteries. I am able to separately run a 1350W microwave and an 800W toaster oven. I tried to test the AC on high and it didn't indicate any problems but I don't think the AC compressor came on, only the fan, because it was 37 degrees outside. I'll provide an update if anything changes after I get it fully installed and take it camping this summer.

The battery is much lighter than my agm one, and the quality looks good. Will share more later.