peppebytes
New Member
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- Jun 6, 2022
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How can i change it?
Seplos CAN BUS RS485 48v 200A 8S-16S BMS
- Thread starter Firechief
- Start date
Lt.Dan
Solar Wizard
You have the send it back and exchange it, if they let you do an even exchange. If not, you'll have to buy a new one
be very careful here, you can not switch from CAN to RS485 (and the other way) trying to do that could leave your BMS out of service, with the only choice to send it back to seplos to fix it.
Hi, I’m new to this. I have built a 48v battery (16 x 304ah eve) and currently have a jk bms can (have also tried the rs485) but cannot get it to communicate with my SunSynk 8.8kw inverter. I’m thinking of buying a Seplos 200amp 16s.
Has anyone connected the Seplos to the SunSynk?
Should I be getting a RS485 or Can Seplos (do they do one with both)?
Would be easier and less expensive if I could get the JK to communicate with SunSynk anyone done this? ?
Has anyone connected the Seplos to the SunSynk?
Should I be getting a RS485 or Can Seplos (do they do one with both)?
Would be easier and less expensive if I could get the JK to communicate with SunSynk anyone done this? ?
Sunsynk is a deye rebadge inverter. You can see on seplos yt channel they build a large solar installation with deye inverter and battery with seplos canbus bms. You have to select pylontech. Unless sunsynk specifically remove pylon support from their inverter it should work.
crossy
Solar Addict
Just finished setting up my Seplos BMS (100A 16S LiFePO4) with my Sofar hybrid.
To my mild amazement it worked out of the box with the Sofar supplied cable and "General Lithium" selected as Battery Type.
I've not tried with "Pylon" as the battery type on the inverter yet, but since it's actually working ...
Anyone know if there's actually an advantage in setting the inverter to Pylon??
EDIT Whilst poking around in the BMS PC software I nocticed the "CAN" drop-down top right, one of the options is "Sofar" so I've selected that, no idea if it actually makes any difference.
Next task, make a cover for the delicate bits, it's all in a solid and reasonably well sealed box, but one can't be too careful
Active balancer not connected yet, let's see how things behave without it.
To my mild amazement it worked out of the box with the Sofar supplied cable and "General Lithium" selected as Battery Type.
I've not tried with "Pylon" as the battery type on the inverter yet, but since it's actually working ...
Anyone know if there's actually an advantage in setting the inverter to Pylon??
EDIT Whilst poking around in the BMS PC software I nocticed the "CAN" drop-down top right, one of the options is "Sofar" so I've selected that, no idea if it actually makes any difference.
Next task, make a cover for the delicate bits, it's all in a solid and reasonably well sealed box, but one can't be too careful
Active balancer not connected yet, let's see how things behave without it.
Last edited:
shavermcspud
Solar Enthusiast
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- Mar 12, 2020
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- 575
You have the settings correct, General Lithium on the inverter and Sofar Can on the BMS. Good work btw
The only issue I can see there, is you have tied your active balancer leads in to the same single cable run as the BMS sense/balance leads.
This will cause you issues and throw random BMS warnings, had the same idea and it started to give issues.
The only issue I can see there, is you have tied your active balancer leads in to the same single cable run as the BMS sense/balance leads.
This will cause you issues and throw random BMS warnings, had the same idea and it started to give issues.
crossy
Solar Addict
Yeah, that arrangement of the balance leads isn't ideal, it's historical (and I was too lazy to change it). It did behave ok with the old Daly BMS so let's see how we do with the Seplos.
The cells are (well) used golf-cart units due to budget constraints so that active beast is definitely needed.
shavermcspud
Solar Enthusiast
- Joined
- Mar 12, 2020
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- 575
I have tried exactly this with the seplos, you end up getting a cell undervoltage error warning. Best to wire them in separate
Do you mean wire them separately to the batteries. I’m looking at changing my jk BMS to Seplos BMS and an active balancer, to get communi action with SunSynk.
I‘ve obviously not set up the SunSynk correctly in AGM mode. It used all my battery up yesterday even though the house wasn’t using more electric than the sun was providing. It also charges the battery when there isn’t excess solar!!!
shavermcspud
Solar Enthusiast
- Joined
- Mar 12, 2020
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Yes the active balance unit and BMS need separate wiring to the cells
crossy
Solar Addict
Job for next weekend it seems
What active balancer are you using and do you recommend?Just finished setting up my Seplos BMS (100A 16S LiFePO4) with my Sofar hybrid.
To my mild amazement it worked out of the box with the Sofar supplied cable and "General Lithium" selected as Battery Type.
I've not tried with "Pylon" as the battery type on the inverter yet, but since it's actually working ...
Anyone know if there's actually an advantage in setting the inverter to Pylon??
EDIT Whilst poking around in the BMS PC software I nocticed the "CAN" drop-down top right, one of the options is "Sofar" so I've selected that, no idea if it actually makes any difference.
Next task, make a cover for the delicate bits, it's all in a solid and reasonably well sealed box, but one can't be too careful
Active balancer not connected yet, let's see how things behave without it.
View attachment 99169
crossy
Solar Addict
It's one of the many "flying capacitor" units available from Chinese sellers, "5A" between any pair of cells. Seems to work pretty well on our more than somewhat mismatched cells.
Active Balance LiFePo4 NMC แอคทีฟ บาลานซ์ 3s 4s 7s 8s 12s 13s 14s 15s 16s 17s 5A | Lazada.co.th
กล่องแดง asw balance: เหมาะสําหรับการเล่นเกมแผ่นดิสก์มัลติมีเดียเกมการแข่งขันมัลติทาสกิ้งของโรงเรียนฯลฯ แอคทีฟบาลานซ์ 16s: โดดเด่นด้วยการออกแบบที่เพรียวบางและการออกแบบอุตสาหกรรมที่ใช้งานได้จริง แอคทีฟบาลานซ์ 4s: โดดเด่นด้วยการออกแบบที่เพรียวบางและการออกแบบอุตสาหกรรมที่ใช้งานได้จริง แอคทีฟบาลานซ์...
www.lazada.co.th
Wow! Tiny!
How do the shunt screws like a 50mm2 lug? I guess it will have to be a 6mm hole.
I'm planning to go for 50mm2 connections (with 3 x 16mm2 on the positive side) to keep the resistances down and by batteries are going to have to be 3m from the DC bus
Thanks Sergea
Kind regards
John
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