ExpertPower UL1973 48V 100Ah 5KWh Lithium LiFePO4 Deep Cycle Battery | 7000 Life Cycles & 10-Year Lifetime | Built-in BMS & LED Monitor | Off Grid, Residential, Home, Cabin, Back-Up | 51.2V 16 Cells

Well i bought 1 of these 7 months ago. I connected it to Outback Power 4KW inverter. I power the house with this setup just allowing to run 3 ton ac, lights and 4 small refrigirators. So far so good. BMS works well, protects battery. The 4KW inverter is under power for the house so inverter is constantly tripping. Battery keeps up well. I have seen it deliver 75Amps constantly when AC turns on. Tech support is great. Some prior comments said no support. Company is in Paramount, CA so u need to call afternoons if u r in easter time. Well packaged, instructions manual is good. Seem high quality so far. LCD gives u more info than u actually need, like cell temp and voltages. 1 year now and going on strong. Picture of app, battery looks same as pixs from manufacturer. You have to wire it with rs485 to USB conveter in order to run Bms Tool App. Converter shown in pix. Bought from Amazon as well

I purchased 5 batteries over a span of about a year. I can say that the batteries are built well and strong. The balancing of cells, recharging, and discharging has been excellent. I’ve never had any problems with them but the only issue I’ve had was the RF45 communication synchronizing with an inverter. Other than that the batteries work and highly recommended.

They work well enough, but I do wish there were better ways to access the control panels remotely, like how the Expert Power inverter has a removable control panel. Also, the price has come down SIGNIFICANTLY since I got mine, and it may be very economical to buy, now.

Batteries arrived three weeks from purchase. The wooden crates were undamaged, but the batteries were banged up pretty bad. One of the rack ears was crushed and had to be removed. I was able to straighten is fairly well but it's definitely not straight and much of the paint came off. The chrome plated handles on the front of the batteries are all bent. I submitted a review to Amazon complete with photos, but the review never posted, so I am trying again without photos. The damage to my batteries is similar to what others have posted. I emailed the Expert Power support with photos, and requested replacement handles and one rack ear. They replied that I should verify that the batteries are working before they would send me any parts. I verified that the batteries seem to work correctly and emailed support again. Now they have gone silent and are not responding to my emails anymore. Also, the booklet that came with the batteries, while nicely done is not very complete. There isn't even a diagram on how to connect the included BMS cables.

I took a leap of faith and pre ordered this unit, first I was expecting this server rack battery to ship around Oct 25, So it was really nice to receive it way early. Shipping was fast and product came packaged excellent in a wooden crate with no damage, once I opened it came with a pair of 5 awg copper wire about 5ft in length with ring terminals for you to size and crimp yourself, a communication cable and manual. I was totally blown away from the features the ExpertPower 48V 100ah server rack battery has for the price, Display is awesome in showing you all the vital info like voltage, SOC, Temp etc, This also has a Main switch to turn off power, This system works perfect for my application, I also have a EG4 LL v2 server rack battery and If i would of come across the ExpertPower first I would of not bought the more expensive EG4 LL battery. These batteries have been running non stop for 5 days no issues so far. I've been running off grid for weeks now and with this additional server rack battery will help for those cloudy days with no sun.

The battery appears to be working, it came very well packed in a wooden crate, and was wrapped in a seperate cardboard box as well, Fedex knocked the hell out of this thing during shipping, there was no visible damage to the crate, but when I opened it and removed the battery you can see the damage in the photos. I like the build quality of this battery and the fact that it survived the Fedex delivery. Time will tell if the battery is functioning properly, but all indications are it was not damaged, once my Inverter gets here I will update this review. The folks at Expert Power have been great so far.

great battery if you don't every run it down. I used them for lights in my barn and had an accident that required surgery and the lights were on running the batteries down. I had three 48v 100ah batteries that lost their charge. I contacted the supplier and they sent me a charger, when that didn't charge the batteries they said it was the inverter that cause the batteries to fail. I contacted the inverter tech service and they assured me that this was not an inverter problem. expert shut down all my commutation so now I have $3600.00 of almost new batteries used one time setting in my barn.....

UPDATE 9/30/25 I have had this battery for 2 years now. And have tortured the hell out if it! And it is still running. It has seen temperatures from -10° to 100° F and ran the whole time. I ran it in a single battery system, pushing a Sungold LFP 6k inverter. Running my whole house. Granted, we used our genny a bunch when the sun wasn’t out. It never shut down due to over current draw on load start up. Expertpower has also fixed the PBMStools software to be in english and functional. Shipping was fast! That was the best part. No product literature. No explanation of any of the ports on the front. None of the communication ports would connect to my computer, using their software. The Modbus software downloaded from the companies website is not in a language of this planet. Turns out they have both Chinese and English configurations loading together which apparently makes Martian. The battery went dead after only 5 hours. Running a very light load. For the amount of money being charged, you would think the Company here in the USA selling this, would have at least tried one of these out and had instructions on their website.