How to wire seplos V3 BMS and active balancer

A full walk through of how to properly wire the Seplos V3 BMS and Active Balancer. Inspired by the torture of incomplete assembly videos with terrible music.

[jackspa]

Perfect video, clear an simple, thank you from France

[jonnytooze]

By far the best video on how to put the Seplos V3 together. All the other videos, including Seplos themselves, rush over the most complex bit, which is the wiring! And the documentation is shambolic when it comes to working out what goes where. I just put mine together in around 3 hours, and would have been 3 days if it wasn't for your video! Huge thanks and I really hope that Seplos link to this in their videos.

[amb]

Great video, couldn't have assembled mine without your truly superb guide. Thank you

[ScenicRiderAdventures]

This is great. I am expecting the V3 seplos DIY kit with active balancer. The video simplifies the connection process

[ViktorP]

Дякую тобі чоловіче!
Дуже вчасне та детальне відео. Мені дуже допомогло в підключенні Seplos 3.0.
Вітання з України!

[banhvo]

Hi Gary
I m assembly same battery as you, they give me 2 sets of active balance cable, all mark as B 😢 and in 1 set they have B0 black. I don't have any clue where it go !
One more question, most of wire go to positive stud of battery cell?

[kenbell]

Excellent just what I needed. Thanks

[adelowooyediran]

You did a better job than Seplos ever did Sir...

[Dairyman]

This Video is a great help to the lack of Seplos manuals and installation instructions. I got my installation confirmed and powered it on without any problems.
Thank you.
Regards from germany

[MikeHollifield_Web]

Built mine, but have an issue where the power switch doesn't turn it off. It's always on regardless of the position of the power switch.


I've tested the switch and cable, all looking ok.

[AwesomeGames-Y]

Thanks for the video. Did you need to top balance the cells before assembling the kit?

[banhvo]

Hi Gary
Just finished, turn battery on, amber and green light
on and
----WARN----Y
check it out:
CAPA---WARN.
Please help, what can I fix this. Thank you

[jackspa]

Hello, where is the connection error on the battery that caused cell 16 to be offset? I have the same problem on a battery. Thank you

[Yesterday]

Hello. Thanks for this very helpful vidieo. I'm just finishing the montage. It's strange tha the displau-y stay always on independentlu of the main power switch position. It also indicate 0 voltage after the welcom screen. I look tree time if evrething is properly wire... and i d'ont fine any mistake. If somebody have helpful idea ?

[VladBYT]

hello Gary! nice and good video .. do you have a video with the setting on the BMS studio?

[ВиталийМорозов-мп]

do you have any Messenger to contact you to reset the video show more

[pr]

Hi from Australia, I have same inverter, using jk inverter BMS, I have a problem with state of charge, after few months of charging discharging cycles, SOC drifts, JK BMS shows 100% after each charge cycle but voltage is lowered in each cycle (in realty it is 70 to 80%). After 7 or 8 cycles, despite showing 100% the battery is 2 or 3 kWh lower in capacity. When 100% SOC, if I change the capacity in BMS settings and change it to the same value, the SOC drops to 60 or 70% and then Solis inverter starts charging for another 2 or 3 kWh. The shift in SOC by Jk BMS is becoming pain, please advise if anyone has any suggestions to fix this issue.

Active Balancer signal from BMS happens when "Cell Diff" Alert is triggered. So, modify settings at BMS Studio so cell diff trigger is the same than Active Balancer setting for start balancing. According to Active Balance documentation is 40mV but by default is set much higher. Don't know why Seplos did it.

[banhvo]

You are the best of all seplos videos at least for beginners like me, thank you so much, save me a lot of headache and frustration.

[ВиталийМорозов-мп]

Подскажите пожалуйста, такая ситуация, подключил на + 16 ячейки с платы балансира провод и кнопка свич начала мирцать но до етого светилась стабильно и также есть ошыбка (capa warn) Y..