Seplos CAN BUS RS485 48v 200A 8S-16S BMS

shavermcspud

Solar Addict
My Seplos unit has failed again, was discharging from 6pm to 2am at 16amps then just went off line, no power to it at all, totally dead. This is now my second unit and this one has already been repaired once. No signs of any damage on the board, fuses are good, support and sales are on Chinese holiday.
 

mahdi89

New Member
My Seplos unit has failed again, was discharging from 6pm to 2am at 16amps then just went off line, no power to it at all, totally dead. This is now my second unit and this one has already been repaired once. No signs of any damage on the board, fuses are good, support and sales are on Chinese holiday.
How many amps ?
Maybe are you doing something wrong?
 

shavermcspud

Solar Addict
How many amps ?
Maybe are you doing something wrong?
As above 16amp, I have the 100amp unit but the absolute max my battery inverter can charge/discharge is 60amp. This unit was already repaired once so pretty sure its a duff. Fairly sure its not something I am doing seeing as its been running fine for several months and I have supplied and installed maybe 15 of these units for friends.
 

mahdi89

New Member
you made me worried about mine that i just have installed.
why it failed first time ?
As above 16amp, I have the 100amp unit but the absolute max my battery inverter can charge/discharge is 60amp. This unit was already repaired once so pretty sure its a duff. Fairly sure its not something I am doing seeing as its been running fine for several months and I have supplied and installed maybe 15 of these units for friends.
 

mahdi89

New Member
As above 16amp, I have the 100amp unit but the absolute max my battery inverter can charge/discharge is 60amp. This unit was already repaired once so pretty sure its a duff. Fairly sure its not something I am doing seeing as its been running fine for several months and I have supplied and installed maybe 15 of these units for friends.
this one is cheaper they just replied on me.. it seems this one is the one used in battery racks
 

Attachments

  • 2A973EDA-7E56-4634-BE22-E7BDD36404D1.jpeg
    2A973EDA-7E56-4634-BE22-E7BDD36404D1.jpeg
    586.7 KB · Views: 26

houseofancients

Solar Addict
this one is cheaper they just replied on me.. it seems this one is the one used in battery racks
this is quite a different beast.
i think @shavermcspud indeed must have a monday morning child , because so far i havent seen one fail yet ( mine has been rock solid).
hopefully seplos will provide him with help after they return for holiday
 

kid744

New Member
So has everyone ordered through the Seplos official store? Just wondering as I will be ordering in the near future.

Kid
 

shavermcspud

Solar Addict
this is quite a different beast.
i think @shavermcspud indeed must have a monday morning child , because so far i havent seen one fail yet ( mine has been rock solid).
hopefully seplos will provide him with help after they return for holiday

Hi all, official update from Seplos on my faulty unit. diode D4 is faulty on units produced before August 2021 as there was a bad batch of components installed. I have checked with a DVM and indeed its gone open circuit both ways. Their resolution is to send me a load of SMD didoes to repair myself which I'm not too happy about to be honest but I'm capable of doing so, others maybe not so. Also it concerns me from a warranty perspective as once I have soldered new components on the board where does my warranty stand? Also the board is covered in a thin epoxy/potting compound that needs to be removed carefully before remvoing or even testing the components.

Original email from support quoted


hello,

"D4" has broken down. Before August, there was a batch of BMS "D4" because of the shortage of electronic materials, and the raw material suppliers because of the unstable supply channels, which caused the "D4" unqualified rate to increase. You can rest assured, we will be responsible.

Can you provide the model of your BMS and who sold it to you?

We apologize for the inconvenience caused to you.

Link Liu
 

houseofancients

Solar Addict
Hi all, official update from Seplos on my faulty unit. diode D4 is faulty on units produced before August 2021 as there was a bad batch of components installed. I have checked with a DVM and indeed its gone open circuit both ways. Their resolution is to send me a load of SMD didoes to repair myself which I'm not too happy about to be honest but I'm capable of doing so, others maybe not so. Also it concerns me from a warranty perspective as once I have soldered new components on the board where does my warranty stand? Also the board is covered in a thin epoxy/potting compound that needs to be removed carefully before remvoing or even testing the components.

Original email from support quoted


hello,

"D4" has broken down. Before August, there was a batch of BMS "D4" because of the shortage of electronic materials, and the raw material suppliers because of the unstable supply channels, which caused the "D4" unqualified rate to increase. You can rest assured, we will be responsible.

Can you provide the model of your BMS and who sold it to you?

We apologize for the inconvenience caused to you.


Link Liu
hmm not what i was expecting in terms of service and warrantee.
@Seplos Chris Ren

i don't think this should be happening from a clear manufactoring fault ?
 

toms

Solar Addict
I’ve been involved in testing new to market BMS units, that kind of thing is only OK if you haven’t paid for the unit.

I wouldn’t be happy if that was me.
 

mahdi89

New Member
yes it does .. this is the model i have
deye is the best inverter brand (Grade A with a good price)

Deye brand appears to be the best of all known chinese brands. Compares favourably against the victrons and Magnums

 
Top