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Seplos 200Ah BMS

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YasasJ

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Aug 12, 2022
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does someone have experience around seplos BMS? is it good? so far I only find good review. please let me know any experience with that product...
 
I purchased 4 of these BMSs, but have not wired them up yet...

Have you seen this guy's videos on the Seplos BMS in operation yet?



They also use them in the Energetech battery modules:

Will's video teardown of that one:


Seplos also sells a DIY battery case for the common 280Ah cells:

MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells

High quality MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells from China, China's leading Seplos DIY Kits product market, With strict quality control Seplos DIY Kits factories, Producing high quality MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells products.
www.seplos.com
 
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Samsonite801 said:
I purchased 4 of these BMSs, but have not wired them up yet...

Have you seen this guy's videos on the Seplos BMS in operation yet?



They also use them in the Energetech battery modules:

Will's video tear of that one:


Seplos also sells a DIY battery case for the common 280Ah cells:

MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells

High quality MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells from China, China's leading Seplos DIY Kits product market, With strict quality control Seplos DIY Kits factories, Producing high quality MASON DIY Unit (suitable EVE 280Ah cell)BOX stack type without cells products.
www.seplos.com
Click to expand...
thanks mate...
 
Sure no prob...

Also forgot to post the video I saw the other day showing the Seplos Mason 280Ah DIY kit install overview which was kind of fun hehe...

 
Tim Tim said:
You might want to look at this video.

Click to expand...

Yeah that's a excellent video too, I like that guy, he does good how-to's. A video like this is good because he slows it down to real time on a real DIY'er in his garage.

Looks like he did the building using the other DIY kit for the smaller cells (was it 135Ah I think his were), same concept though as the 280Ah kit, maybe the case is a bit larger on the other kit.
 
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He has released another video on it today. :)


He funny because he sort bumbles along as though he doesn’t know too much then u realise just how intelligent he is when he gets into his serious technical moments.
 
Tim Tim said:
He has released another video on it today. :)


He funny because he sort bumbles along as though he doesn’t know too much then u realise just how intelligent he is when he gets into his serious technical moments.
Click to expand...
I like Andy cos he doesn't make me feel stupid, he manages to bring me up to speed over the video so i can handle the teccie bit at the end (y)
 
I have two that I just installed they both will power up go through the flashing led test and then everything shuts off. Now I have to figure out how to connect them to the computer to set parameters. They won't work right out of the box without a computer and RS485 connection.
 
RV10flyer said:
I have two that I just installed they both will power up go through the flashing led test and then everything shuts off. Now I have to figure out how to connect them to the computer to set parameters. They won't work right out of the box without a computer and RS485 connection.
Click to expand...

Do you already have one of those USB-to-RS485 adapters yet? (for the PC side)

Do you have the Google Drive link to all their downloads for the Seplos gear? Just in case, if not, here is again if anyone needs it...

Battery Monitor - Google Drive

drive.google.com drive.google.com
 
RV10flyer said:
I have two that I just installed they both will power up go through the flashing led test and then everything shuts off. Now I have to figure out how to connect them to the computer to set parameters. They won't work right out of the box without a computer and RS485 connection.
Click to expand...
Not sure but this may help you.

 
Samsonite801 said:
Do you already have one of those USB-to-RS485 adapters yet? (for the PC side)

Do you have the Google Drive link to all their downloads for the Seplos gear? Just in case, if not, here is again if anyone needs it...

Battery Monitor - Google Drive

drive.google.com drive.google.com
Click to expand...
I spent eight hours today as I am not a computer guru. This is some aggravating software and poor instructions. Then I finally go through 86 parameters and get it to charge the battery, but it won't discharge without putting a jumper on the two pin plug on the back side. Rediculous.
 
RV10flyer said:
I spent eight hours today as I am not a computer guru. This is some aggravating software and poor instructions. Then I finally go through 86 parameters and get it to charge the battery, but it won't discharge without putting a jumper on the two pin plug on the back side. Rediculous.
Click to expand...
I intend to buy this adapter from same seller. I hope you bought seplos adapter, because they already mentioned other type of adapter wouldn't be work properly, due to driver issue. I directly contact merchant from seplos, he already provide all of the documentation for BMS + its monitor. If you need them I can share it with you...
 
YasasJ said:
I intend to buy this adapter from same seller. I hope you bought seplos adapter, because they already mentioned other type of adapter wouldn't be work properly, due to driver issue. I directly contact merchant from seplos, he already provide all of the documentation for BMS + its monitor. If you need them I can share it with you...
Click to expand...

I contacted Minerals tonight. Sunday noon in China. They were very helpful. They had me go into parameter settings, turn the external switch "off". You know the one I put a jumper on. Well, now it discharges without the jumper. They said the external switch connection is for customers that wish to install a nc double throw switch to turn off output. I figured out that if I installed a jumper, it enabled the output. Once you figure the Seplos out, it's actually pretty nice.

I used this adapter from Amazon. Then cut off end of Cat6e cable. Green, Orange, Brown. It worked and I am not a computer guru!!
 

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Tim Tim said:
You might want to look at this video.

Click to expand...
i like andy's trinkerings in general , but this wasnt a fair test imho, this was setup to fail imho, as i said under the video
deliberately bringing cell out of balance, then complaining the passive balancer cant keep up isn't testing but setting up to fail.
add to that, these bms'es communicate with inverters for a reason, they tell the inverters to lower the charging amps when at the top of the curve, therefore lessening the need for active balancing.

the pc software is something you need to get used to, i'll give him that.
then again, in all normal situations it's needed once, then for monitoring your inverter monitoring should be telling you everything you need to know through comms

again my ( sometimes not so humble ) opinion

that all being said, i've been running my seplos 200a bms's now for quite some tome, with comms to my inverter(s), not seeing the predicted cell imbalances, and really havent used the pc software for a pretty long time now, they just work.

the has been a batch where a dione could break, but that was handled under warrantee to.my.knowlede , @RayfromTX ( ray builds cool stuff YT channel) made a movie about it, and also how to seld replace
 
I've got 2 of my 8 DIY Mason kits up and running, but I cannot get the RS485 connection to work. I've tried several different combinations:
single battery/master using 2 diff RS485 to USB adapters (both are WaveShare) and 2 diff computers - both recognize the USB adapters when plugged in.
2 batteries Master/Slave1 via dip switches with the 2 diff RS485 to USB adapters on a Win10 PC (sees both adapters)

I set the Baud rate in Seplos software to 19200 as well as Device Manager-> Ports-> USB config to 19200.

I've tried 3 diff cables and even tried to use the diff pins on RJ-45 cable. I did a continuity test across pins 1-3 on each end to make sure I have them wired correctly to the USB adapter.

I noticed in their docs, they show a TIA 568B patch cable. Most Cat6 cables today are 568A. Doesn't matter for my config as I lop off one of the ends and direct-wire the cable to my USB to RS485 adapter's wire block.

Is there something special about the Seplos adapter? I've even tried swapping A+/B- and removing ground. Nothing works.
 
Sounds like I've been lucky. All 3 of my Mason's talk to the PC software without problem. 568A vs. B means nothing in this application. All that matters is the correct pins on the Mason's RJ45 are connected to the RS485 converter pins correctly. I use the other 5 wires in the network cable to carry the Outback system's RS232 data. I'm using the FT232 driver with the waveshare adapter,
 
shorawitz said:
I've got 2 of my 8 DIY Mason kits up and running, but I cannot get the RS485 connection to work. I've tried several different combinations:
single battery/master using 2 diff RS485 to USB adapters (both are WaveShare) and 2 diff computers - both recognize the USB adapters when plugged in.
2 batteries Master/Slave1 via dip switches with the 2 diff RS485 to USB adapters on a Win10 PC (sees both adapters)

I set the Baud rate in Seplos software to 19200 as well as Device Manager-> Ports-> USB config to 19200.

I've tried 3 diff cables and even tried to use the diff pins on RJ-45 cable. I did a continuity test across pins 1-3 on each end to make sure I have them wired correctly to the USB adapter.

I noticed in their docs, they show a TIA 568B patch cable. Most Cat6 cables today are 568A. Doesn't matter for my config as I lop off one of the ends and direct-wire the cable to my USB to RS485 adapter's wire block.

Is there something special about the Seplos adapter? I've even tried swapping A+/B- and removing ground. Nothing works.
Click to expand...
do you try to get some support from seplos guys? I don't see any special different on seplos adapter (when looking on their user manual). I can't tell much about it, I already ordered one, but it's still not delivered to me. Try to contact with your seller, he will direct you to their technical support guys. I already got a number from them.. they are really supportive for me
 
YasasJ said:
I intend to buy this adapter from same seller. I hope you bought seplos adapter, because they already mentioned other type of adapter wouldn't be work properly, due to driver issue. I directly contact merchant from seplos, he already provide all of the documentation for BMS + its monitor. If you need them I can share it with you...
Click to expand...
This is not correct at all, its an upsell from Seplos, I use the cheapest crappest USB to RS485 adapter from amazon for $1 and its been working for over a year

YOUMILE 5pcs CH340 USB To RS485 485 Converter Adapter Module For Win7/Linux/XP/Vista : Amazon.co.uk: Computers & Accessories

YOUMILE 5pcs CH340 USB To RS485 485 Converter Adapter Module For Win7/Linux/XP/Vista : Amazon.co.uk: Computers & Accessories
www.amazon.co.uk
 
I bought another USB->RS485 adapter (another Waveshare.) It is working and I can now see all 4 of the BMS'. The one weird thing however is that I had to set the Baud rate to 9600 in the software and in "Computer Management" on Windoze. Oh well. It works now.
 
RV10flyer said:
I have two that I just installed they both will power up go through the flashing led test and then everything shuts off. Now I have to figure out how to connect them to the computer to set parameters. They won't work right out of the box without a computer and RS485 connection.
Click to expand...
Not my experience. Top balance your cells first to make sure a parameter is not shutting it down, such as low voltage. I have 7 built and have yet to connect to a PC.
 
Sanwizard said:
Not my experience. Top balance your cells first to make sure a parameter is not shutting it down, such as low voltage. I have 7 built and have yet to connect to a PC.
Click to expand...
The settings were incorrect. It works now, but for grade B cells the 150mA of balance is not enough. I like JK better, their iPhone app and the new 4.3" LCD. I just received 5 JK's today. One more coming next week.
 
YasasJ said:
does someone have experience around seplos BMS? is it good? so far I only find good review. please let me know any experience with that product...
Click to expand...
your thread title says 200Ah. I have noticed seplos pre sales doing the same.

should it not be 200A for ampere's?

Also in the BMS manual I find something odd.
Code: 
Item Min. Max. Type
Standard working voltage 40V 59V 48V
Standard charging voltage 30V 60V 54V
Working temperature range -20°C 70°C 25°C
Storage temperature range -40°C 85°C 25°C
Working humidity 10% 85% /
Continuously charging current / 110°C 100°C
Continuously discharging current / 110°C 100°C

The bottom 2 lines state celcius as unit while I would expect amperes there.


if I am correct then those are things like these that make me a bit nervous to start using their products
 
brandnewb said:
your thread title says 200Ah. I have noticed seplos pre sales doing the same.

should it not be 200A for ampere's?

Also in the BMS manual I find something odd.
Code: 
Item Min. Max. Type
Standard working voltage 40V 59V 48V
Standard charging voltage 30V 60V 54V
Working temperature range -20°C 70°C 25°C
Storage temperature range -40°C 85°C 25°C
Working humidity 10% 85% /
Continuously charging current / 110°C 100°C
Continuously discharging current / 110°C 100°C

The bottom 2 lines state celcius as unit while I would expect amperes there.


if I am correct then those are things like these that make me a bit nervous to start using their products
Click to expand...
Their manuals are in Chinglish. Poor conversion from Chinese to English. The product works fine.
 
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