I have shoto batterie the run light and the arlam light is flashing and no communication to my deye inverter 5kw 

On 2022/01/28 at 1:48 PM, Scubadude said:

Mine was made 31 Aug 2021. I sent you a PM that may be or may not be of value. 

Mine is july 2021. Same problems. I see2min set mention here, is that correct?

On 2022/01/04 at 2:10 PM, Scubadude said:

This graphic suggests RS485A <-> RS485A. Not quite sure what the original source is, but it seems to be legit. Curious why one battery is earthed and the other one not. 

Hi, we are connecting 2 of these batteries. Shoto 5.12 SDC10-box5 with a 8kW Deye. Can I ask why the master battery has the CAN and Negative wire? Or does that not matter? 

 

We have the CAN cable to the battery with the positive.

On 2023/08/01 at 7:28 PM, Dylan dc said:

Hi, we are connecting 2 of these batteries. Shoto 5.12 SDC10-box5 with a 8kW Deye. Can I ask why the master battery has the CAN and Negative wire? Or does that not matter? 

 

We have the CAN cable to the battery with the positive.

It does not matter whether the master has the positive or negative cable. What matters is that the CAN comes from the master battery with the correct dip settings as in the image.

On 2022/01/29 at 2:22 PM, LoodPyp said:

2x Shoto batteries dated 31 August 2021. Master showed as dead last week. Upon recommendation by supplier I disconnected both batteries and reset the master (by 2 minute reset press), and it seems to be behaving well now, as before. The next option was to return it to the supplier for BMS replacement. (Thanks to this discussion I was able to avoid that as a first option.)

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.

20 hours ago, Chrisbu said:

I have endless BMS problems with my Shoto so maybe this will help.

What problems are you having with your battery? Is it not charging to 100%? Is it dropping SOC suddenly and cutting out? What are your charge voltages and currents set to? Do you have comms set up to the inverter or PC?

On 2022/01/23 at 9:29 PM, Scubadude said:

@TheoVogel I had the same happen last week on my Deye / Shoto rig. SOC dropped from 50% to 0, then back to 100% but with only one battery working.  Both batteries were collected on Friday for a "firmware update" at the distributor, but the offending battery was returned with the warranty seal broken (plus scratched cover and damaged stickers for good measure).  Whatever they did seems to have worked, as I have working LEDs on both batteries for the first time.  

Hi Scuba DUde,

I also have a dye shoto rig, same issue, you said the firmware update worked, where can one do such a firmware update?

it looks like the shoto battery uses a Seplos BMS. I build my own batteries and use the same Seplos bms. The Seplos  work good but the setup could be difficult. If guys have trouble log into battery using the Seplos software and check the errors. sometimes the system will shut down on a inrush current and you think the battery is dead.

I have experienced this as well. There are a few issues here and the BMS on the Shoto is poorly designed and implemented. Heat sync is not effective and reduces life of MOSFETs, so don't expect 10 years.

To recover the batteries it is quite simple. You must have a variable voltage and amperage power supply, a minimum of 24 volts. Now group a set of 4 cells together that will give you a high on these of 14 volts. You will find that if you test them their voltage will be around 8 volts, even lower, over-discharged. Set your power supply to 12 volts and 1 amp, 2 if you have a good unit. Leave this for about 2 hours, and the battery supply unit will act as a charger and limit the input to 2 amps. A normal power supply with no amperage control is not suitable as the batteries will absorb as much amperage as possible and this will not float them to the same level. 

If you are below 45 volts most BMS will not recover the voltage of the battery.

Repeat this for all 4 sets, takes a day or so. You are doing this after the BMS so completely bypassed. You will now have 4 sets all at or close to 12 volts each set giving you 48 volts on the battery. If the BMS is not faulty it will start and will then manage the full charge of the battery to the high of 56 volts, and then you must leave this for 45 min on high to allow absorption. Absorption is the process by which the BMS will allow the equalisation of all cells, very important.

Recovery of batteries takes a long time and the right power supply, but if you have to do this with a lithium battery, you are purchasing the incorrect battery, and ultimately cheapest is not the best value.