Chrisbu

Hello, how do you perform the 2 minute reset? I have endless BMS problems with my Shoto so maybe this will help. Does one turn the battery off with one press and then press and hold for 2 minutes to reset ? Would like to try this before returning the battery. Thank you.

Hi, I have been running this battery with 2 x Luxpower SNA5000 inverters, with solar panels, for about 3 months. Over the last month, I have started experiencing what I have been told is BMS drift and the battery will not charge beyond a SOC of 88% and this seems to deteriorate by 1% every 2-3 days now. Battery still shows a charge of 56v but as soon as there is an outage it drops to 53.4v. Luxpower say this is a battery BMS issue. does anybody know how to resolve this problem short of draining the battery to 0% and recharging it in the hope it will reset the starting point for the BMS? I am not keen on this as this takes the battery below the recommended SOC depletion and could damage the battery.

I’m not an expert, but I have never seen a 48v battery with 13 cells. The float charge on that battery is 52v so if you divide that by 16 cells you get back to the 3.25v per cell needed for a LiFEPO4 battery for optimal charging. At 13 cells you are pushing each cell to 4v+ per cell which will kill the battery very quickly as it is being repeatedly over charged every charge cycle. As I understand 48v is the output voltage, the charge voltage is something different.

16 LiFePO4 cells This means that to make a 48V battery pack requires 16 LiFePO4 cells, 16 strings full voltage 16*3.2 = 51.2V, LiFePO4 is considered to be the most fireproof, and their LiFePO4 is considered to be the most fire-resistant, and they typically last twice as long as ordinary NCA/NCM 18650 battery packs. You will see all your 13 cells are charging to around 4.2v to get to the charge voltage of 54/55v compared to the recommended max 3.6v which means you are damaging all your cells every time you charge them. I took mine back and it was confirmed faulty. I got a refund and replaced it with a Shoto battery.

I also recently installed one of these. I also have 3 faulty cells, any chance yours was 14, 15 and 16? I’m having buyers remorse on choosing this battery!!