LiTime 48V Battery Equalizer, Active Balancer for 24V/36V/48V Bank, Supports for LiFePO4, Lead Acid, Gel, FLA, SLA Battery, Perfect for Home, RV, Solar, Trolling Motor, Off Grid

I bought this when I bought with first 4 12.8v LiFePo4 batteries that I wired in series for 51.2v. These batteries were to be used with a solar inverter to power my house during outages.I read all the warnings about batteries in series becoming unbalanced over time thus affecting the longevity of the pack.I figured an active battery balancer would be perfect keep everything in line. After my research I settled on this brand. The reviews appeared good and the brand from what I understand was reputable.I charged all the batteries in parallel to 100% first, let them sit overnight then proceeded to connect them in series. The instructions say to install the leads from left to right and that's what I did.The next day, one battery is 200mv lower than the rest. The next day another battery is 60mv higher than the rest. This cycle went on for weeks. They never balanced. To make matters worse because it couldn't balance it never stop running draining my batteries very quickly.What's ironic is after I uninstalled it is when my batteries achieved balance.I've also used this on another set of LiFePo4 in series and had the same result. I'm just going to assume I got a defective product as I'm seeing reviews saying it works.UpdateIt turns out the one I got was defective. Support reached out to me and we went through several troubleshooting steps. After determining that the unit was indeed defective they sent me a new one free of charge. Been testing the new one for several days now and it works flawlessly.Thanks LiTime, I will definitely recommend.

works great, other than the high pitch ringing sound it makes when first starting it up.

Keeps batteries equalizedBattery ballancer

I bought this equalizer to leave installed on my battery string. It appears to have failed within 6 weeks and would cause my battery voltages to drop very quickly and lock out the BMS. Eventually things would reset after I broke the string and charged the batteries on their own. Everything has been fine since I removed the equalizer. I like the idea and I have no idea if I just got a bad unit or if it there was something wrong with my application. I did email with LiTime tech support and they seemed to indicate my unit failed but they didn't offer a replacement or any troubleshooting steps. LiTime has otherwise great to deal with so not sure what happened here.

I installed it in 15 minutes. Take care to leave the negative lead protective covers in place until final connection. I had planned to install a 10a fuse for each pos lead so that I could disconnect easily if needed. However, the thing just works! I have seen no excessive draw as other have noted. I have checked every day or two over the past month and the voltages are always within 10mv. My overall efficiency and capacity have not been adversely impacted. I can now take it safely down to 10% without one of the four LiTime Mini's disconnecting for low voltage and shutting down my 48v system. This is about 6-7% more than before the balancer. This balancer is worth the money.

The install was great works for my batteries perfectly

Been us before they selling it

This product works perfectly!