2020 POLL: What BMS are you using in your system? (UPDATED)

1. TinyBMS s516 150/750A with external current sensor
2. 16s / 48v
3. Current doesn't go through BMS
4. ~$300 (after shipping)
5. Somewhat satisfied**
6. Energus Power Solutions

**Pros: Documentation is excellent; UART communication with an MCU is relatively easy; Cons: Can't get stable current readings when connected to HF inverter, so SOC values are unreliable; support is atrocious.

1. Sbms0 with wifi
2. 2p4s
3.current does not go through
4. 174.77 delivered
5. Satisfied
The available resources on this site ( Dacian, @ filterguy) and the fact that the few questions I have had have been answered by Dacian literally in minutes. The support is what sold me.

REC

The overkill solar product is just a relabelled "JBD" unit, right? Which apparantly is the same as this

JBD being an acronym for a chinese mfr.

Batvette said:

The overkill solar product is just a relabelled "JBD" unit, right? Which apparantly is the same as this

Smart BMS 4S 60A 80A 100A 120A 12V Lifepo4 Battery Protection PCB Bluetooth APP | eBay

4S 60A 80A 100A 120A BMS:it is only BMS. Note: this BMS with balance function. 1 x BMS Lifepo4 Battery Protection PCB Board. Double star positioning: GPRS+ Beidou positioning is accurate. Bluetooth module : if you use for phone app, need to buy.

www.ebay.com

JBD being an acronym for a chinese mfr.

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Correct

You get support and a warranty from Overkill

ArthurEld said:

You get support and a warranty from Overkill

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^

ArthurEld said:

You get support and a warranty from Overkill

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Well thats worth something but warranties are generally marketing tools used by mfrs with substandard products, which it appears the JBD BMS is not. Toyota and Honda automobiles historically have had the shortest warranties in the industry, while mfrs like Hyundai and VW, when their products were faltering, offered 10 yr bumper to bumper protection.
Perhaps thats a debate I wasnt looking to start, but when I buy a product, particularly one that requires assembly so to speak, the idea I might have to box it up and ship it back for a replacement isnt expected. It could happen but if I choose wisely and research reviews it usually doesnt.
I was thinking more along availability, as their website doesnt seem to have any idea when they will have more, and if thats the case, I dont know how the warranty situation would work right now anyway.
The shipping situation from China is a real mess presently and I know thats not their fault so Im not here to attack them, just verify that what they have isnt a proprietary product.

guenter said:

JBD BMS 120A
4s
120A
~55$
not satisfied
Ali_Is_Here

Fried the BMS by doing a short circuit, 15 MOSFET's gone..., bad layout, bad cooling

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Can you elaborate? Should any BMS expect to survive a short circuit?
What did you do?
Or are you claiming a defect in the board caused your cells to short circuit?

Batvette said:

Well thats worth something but warranties are generally marketing tools used by mfrs with substandard products, which it appears the JBD BMS is not. Toyota and Honda automobiles historically have had the shortest warranties in the industry, while mfrs like Hyundai and VW, when their products were faltering, offered 10 yr bumper to bumper protection.
Perhaps thats a debate I wasnt looking to start, but when I buy a product, particularly one that requires assembly so to speak, the idea I might have to box it up and ship it back for a replacement isnt expected. It could happen but if I choose wisely and research reviews it usually doesnt.
I was thinking more along availability, as their website doesnt seem to have any idea when they will have more, and if thats the case, I dont know how the warranty situation would work right now anyway.
The shipping situation from China is a real mess presently and I know thats not their fault so Im not here to attack them, just verify that what they have isnt a proprietary product.

Click to expand...

I don't own an Overkill BMS or a JBD BMS.
But I have been impressed by reports from other people on this forum.
From what I gather, Overkill will replace the BMS if anything goes wrong.
And I am fairly sure they ship from Florida.

Batvette said:

Can you elaborate? Should any BMS expect to survive a short circuit?
What did you do?
Or are you claiming a defect in the board caused your cells to short circuit?

Click to expand...

Sorry, I am too late, I know.
If a BMS claims to survive a short circuit, it should survive. Thats what I tested. Just doing a shortcircuit on the load side. The result was: Most of the FET's on the load-side on the board were blown.
Additionally, because of the bad layout and design of all these JBD-BMS (common port BMS) I will never again use these devices. Some people switched of the charge-part with android but still used the load-part with an espresso machine: What happend: The load-part was properly switched on, the charge-part was OFF, but the current-flow (because of commen port design) was also through the diodes of the charge-part FET's, resulting in increasing temperature >50 degree on the board and some boards did not survive that procedure, because of faulty temp-sensors or settings.
Also the MOSFET's are soldered onto the board with theire metal-side, which is normally mounted on cooling blocks, and their plastic side was cooled, just ignoring simple layout and design rules.
And the balancing current is a joke.
In my eyes these boards are chinese waste blocks!
I am using now different other better BMS's, which have no FET-arrays but wether relais or Fet-switches externally (Victron BP works if only used for load OR charge). A short on the load side only blows the fuse, nothing more.