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

[burgerking]

Yes using the pc app

Hmmm... sounds like a hassle having to use a pc/laptop on every client trip...

 

[tigerwillow1]

The Seplos BMS manual says "Remaining Capacity" is "Calculated accordingly to the cell voltage". I translate that as the SOC is based totally on voltage readings. It seems to me it couldn't possibly be that simple to get an accurate result, could it? Applying a charge current or a load can make a big immediate change in the cell voltages, but almost no immediate change in SOC.

 

[sergea]

Nope, reading only the voltage is not accurate. The documentation doesn't go into the glory detail. The BMS, need to be first calibrate in order to evaluate the SOC. The seplos BMS maintains the SOC according to the charge/discharge current and voltage sampling. (same as victron battery monitor) . The BMS will instruct the inverter to fully charge the battery, when there is a need to recalibrate (see pylontech protocol document for the details) . here is one more reason to have the BMS communicate with the inverter.

 

[meccip]

Same for me. I texted one of their after sales engineers (Link Liu) and he sent me the Growatt specific firmware file which has already been posted on this thread as I see now. I updated the firmware set the CAN protocol to Growatt and it worked straight away.

Are you talking about CAN1101[FW27-DFSET_GW02_NEW_210616] ?? Because i have same problem with my Growatt SPH

 

[Puitl]

The BMS will instruct the inverter to fully charge the battery, when there is a need to recalibrate (see pylontech protocol document for the details) . here is one more reason to have the BMS communicate with the inverter.

I don't want to be a spoilsport, but I´m sure the BMS does this not, not the Seplos.
More and more users who are writing with the technicians from Seplos and testing the BMS in all it´s functions come to the same conclusion: They don´t know how to charge a lithium-battery and the software and charging-algorithms are simply a fail.

 

[Tinbum]

I don't want to be a spoilsport, but I´m sure the BMS does this not, not the Seplos.
More and more users who are writing with the technicians from Seplos and testing the BMS in all it´s functions come to the same conclusion: They don´t know how to charge a lithium-battery and the software and charging-algorithms are simply a fail.

? the Seplos is the BMS.

 

[houseofancients]

I don't want to be a spoilsport, but I´m sure the BMS does this not, not the Seplos.
More and more users who are writing with the technicians from Seplos and testing the BMS in all it´s functions come to the same conclusion: They don´t know how to charge a lithium-battery and the software and charging-algorithms are simply a fail.

oh wow..
i'd would like you to prove those statements..
sounds like load of bullshittery

 

[Sanwizard]

I don't want to be a spoilsport, but I´m sure the BMS does this not, not the Seplos.
More and more users who are writing with the technicians from Seplos and testing the BMS in all it´s functions come to the same conclusion: They don´t know how to charge a lithium-battery and the software and charging-algorithms are simply a fail.

The BMS is not supposed to know how to charge a Lithium battery. Its only supposed to be there as a failsafe to protect it. Its your MPPT charger that is supposed to know how to charge the battery.

 

[Tinbum]

The BMS is not supposed to know how to charge a Lithium battery. Its only supposed to be there as a failsafe to protect it. Its your MPPT charger that is supposed to know how to charge the battery.

Thats not true. Many bms are programed to tell the inverter how to charge a battery. My pylon batterys cut charge rates at different soc. That's not protection.

 

[shavermcspud]

Thats not true. Many bms are programed to tell the inverter how to charge a battery. My pylon batterys cut charge rates at different soc. That's not protection.

My Seplos defo manages the charge, I can see the can messaging from the BMS to the inverter when I hit my target voltage and the charge rate drops from 100amp to 10amps.

 

[SteveC4]

Hi, can anyone help with an issue I have with my Seplos BMS? I was adjusting parameters on it and I lost connection. Now any time I try to start it up, it starts (LED's light up) for around 30 seconds and then shuts down.. Pack voltage is currently 52v. Any tips as to what could be causing this?

 

[houseofancients]

Hi, can anyone help with an issue I have with my Seplos BMS? I was adjusting parameters on it and I lost connection. Now any time I try to start it up, it starts (LED's light up) for around 30 seconds and then shuts down.. Pack voltage is currently 52v. Any tips as to what could be causing this?

were you setting the shutdown parameters ?

 

[mahdi89]

Hi, can anyone help with an issue I have with my Seplos BMS? I was adjusting parameters on it and I lost connection. Now any time I try to start it up, it starts (LED's light up) for around 30 seconds and then shuts down.. Pack voltage is currently 52v. Any tips as to what could be causing this?

Yes!!! happened to me before! the firmware got corrupted
try to upgrade the firmware
keep rebooting the the bms untill it connect to the upgrade software
took me a bit of time

Battery Monitor - Google Drive

drive.google.com

 

[SteveC4]

Thanks chaps, I must have cocked up one of the settings as it would not stay on at all. I ended up connecting the BMS to a bench power supply at 54v and this got it turned on so I could revert back to standard settings

 

[SteveC4]

Actually got another question now. Because I had to revert all settings this has messed up the total ah and useable ah. Should I just charge to full voltage @ 58.4v then set the pack AH correctly, then do a discharge to 10% @ 0.5c so everything gets calculated properly?

 

[houseofancients]

Actually got another question now. Because I had to revert all settings this has messed up the total ah and useable ah. Should I just charge to full voltage @ 58.4v then set the pack AH correctly, then do a discharge to 10% @ 0.5c so everything gets calculated properly?

yes, afraid you'll need recalibate, but i wouldnt go to 3,65 a cell.
3,5 or 3,45( default setting) and 2,7 low (default) should be enough to calibrate

 

[SteveC4]

Ok, thanks. Not sure if it's a bug with the software but I have to hit save all to save some settings but this then resets the Battery Rated Capacity AH and SOC AH.

 

[houseofancients]

Ok, thanks. Not sure if it's a bug with the software but I have to hit save all to save some settings but this then resets the Battery Rated Capacity AH and SOC AH.

as microsoft used to say :
" it's not a bug, it's a feature"

 

[SteveC4]

Ha ha, yes that old chestnut! I think I have my top-end voltages adjusted right now. More by luck than skill. I still can't figure out when it decides 100% is 100% but it did eventually do this last night and then put the battery in to standby (while waiting for load) which is what I wanted. Will have to test this again on the next charge cycle.

Working on tweaking the lower end today. That battery monitor software definitley has some funny quirks. I'd love to be able to correct all the incorrect English words. Would make it so much easier to read!

 

[shavermcspud]

Ha ha, yes that old chestnut! I think I have my top-end voltages adjusted right now. More by luck than skill. I still can't figure out when it decides 100% is 100% but it did eventually do this last night and then put the battery in to standby (while waiting for load) which is what I wanted. Will have to test this again on the next charge cycle.

Working on tweaking the lower end today. That battery monitor software definitley has some funny quirks. I'd love to be able to correct all the incorrect English words. Would make it so much easier to read!

I started work on " translating" the software, if you have a look there are two XML files called en-us and one under the agreement folder called 16s_v20 with all the weird Chinese oddness language, this is read in depending on what config file you loaded up originally. I have changed quite a few including the max and min voltages so you can actually see the cell differences rather than the truncated output

 

[houseofancients]

I started work on " translating" the software, if you have a look there are two XML files called en-us and one under the agreement folder called 16s_v20 with all the weird Chinese oddness language, this is read in depending on what config file you loaded up originally. I have changed quite a few including the max and min voltages so you can actually see the cell differences rather than the truncated output

that would be good...
and i agree sometimes it is a quircky

 

[houseofancients]

Ha ha, yes that old chestnut! I think I have my top-end voltages adjusted right now. More by luck than skill. I still can't figure out when it decides 100% is 100% but it did eventually do this last night and then put the battery in to standby (while waiting for load) which is what I wanted. Will have to test this again on the next charge cycle.

Working on tweaking the lower end today. That battery monitor software definitley has some funny quirks. I'd love to be able to correct all the incorrect English words. Would make it so much easier to read!

well the only way ( i know of) of recalibrating the soc is a full charge to a full discharge

 

[SteveC4]

Yes, I did see that but wanted to adjust the language in the parameters section. Monomer and Pressure need changing! Can't seem to find them anywhere though.

 

[shavermcspud]

well the only way ( i know of) of recalibrating the soc is a full charge to a full discharge

You can manually change the SOC, normally when I set these up for a customer, I top balance all the cells to3.65, hook up a new Seplos unit, login with admin & admin, go to upload settings, change the battery capacity,rated capacity, then change the SOC ah to whatever the cells are rated for, the change the top end cut off and bottom end cutoff, enable the balance and minimum delta then its job done. you have a fully charged pack, set at 100% soc noted with zero charge cycles ready to go. Section 58 & 59 are what you want to change.

 

[SteveC4]

Thanks for this tip. Will wait to see what happens with the next charge cycle.