Bestech 10s BMS USA

@jaysoncena Lucy emailed and said that the minimum quantity per module is 2, so you would need to buy 2 of the 9s. Let me know if that is ok they are 38.5 ea

@korryh - ok, i’ll get 2 x 9S and 1 x 10S. But if anyone is interested with 9S, feel free to get it.

Btw there is a qty discount if we get 50… but I doubt we will

@PXSS I am emailing Lucy and Donna now do you want your 2 10s to have your preferred settings

@korryh Yes please.

Here are some differences between the 2 settings.

101CD (the one I want)

-The BMS will not stop a charger unless the cells reach 4.25V. Not an issue if you have a good charger that doesn’t overcharge cells and has auto shut off.

-The BMS will cut off at 2.5V which is 100% depleted for Li-Ions.

S8261-G3P (The one most people here use)

-The BMS will stop a 42V charger if it tries to over charge your cells. Most cheap chargers and knock off rc chargers can charge up to 4.25V which would be bad for your cells. Not necessary if you have a good charger that does 4.20V.

  • The BMS will cut off at 2.8V which is roughly 90% capacity used

I still recommend that all of the boards have a 150A current limit as that is much higher than what Li-ion cells can deliver in a 4P configuration.

@jaysoncena, @PXSS, @mmaner, @sl33py, @Crushkrew, @thisguyhere

Almost there - They put the wrong quantities down for the 10s BMS so I asked for another quote with shipping and paypal fees and updated quantities. Also I changed the specs to be conservative for everyone but PXSS since we probably dont have an adjustable charger (yet).

We are getting
S8261-G3P Over charge detection voltage: 4.20V+/0.025V Over charge release voltage: 4.10V+/0.05V Over discharge detection voltage; 2.80V+/0.05V Over discharge release voltage: 2.90V+/0.1V

PXSS is getting 101CD Over charge detection voltage: 4.25V+/0.025V Over charge release voltage: 4.05V+/.005V Over discharge detection voltage: 2.50V+/0.0625V Over discharge release voltage: 3.00V+/0.1V

Also I changed the Over Current Detection to 150A+/-20A instead of 200+/-40A (this is what you are calling 150A current limit - right?)

Thanks @PXSS for the help and info. Can yo also let me know if the Over Current Detection on the spec sheet is what you are calling 150A current limit.

perfect, i’m happy about the 4.10v upper, 2.90v lower limits. those are the limits i’m using for my current 10s4p pack.

I don’t know if they can do 150A over current detection, at least per my discussion with them last month 200A or 240A was the the only choice.

That is kind of what I thought as well when PXSS showed there were specific boards and not really adjustable - but I asked anyway. Thanks for the heads up.

No worries, let me know if I can help.

@korryh @mmaner From my conversation last night with Lucy, they could do 150A over current detection.

Donna: For the over current detection current, it is in range, how about 200+/-20A

Me: Can this be lower? 150+/-20A

Lucy: it is ok

Does anyone else understand what the over current detection voltage is? This was Lucy’s explanation: “This is the voltage related with current beyond your cells’ can handle, then our BMS will cut off the output be detection voltage”

quick question. do we know what the dimensions are? just trying to get an idea how and where to fit it on my pack.

yes, it is 120mm x 80mm x 25mm

They gave us the 150A+/-20A - yea!

Shipping and paypal from Bestech I just split it up 7 ways so it will be 11.33 per person

Add up your BMS Total+11.33+ the way you want it shipped

Let me know the way you want it shipped and your address in paypal.

My Paypal is [email protected] If I get all the money today I can put the order in. If I dont get the money today I wont be able to place the order till Sunday (their Monday).

@jaysoncena 9s x 2 and 10s me 10s3p @PXSS 10s x2 @mmaner 10s @sl33py 10s and 12s @Crushkrew 12s2p @thisguyhere 12s3p

9s - 38.50 10s - 39.00 12s - 40.00

shipping in US flat rate USPS (usually 2 days) 7.15 shipping in US first class 3 to 4 days 4.00 Shipping to Canada 13.50 if it is 8oz or under - I dont kow how much it weighs but probably under 8oz.


mine is 47.15 but I need to add an amount for “China Shipping”… how much?

Thanks… I can pay today…:wink:

@Crushkrew Shipping from china is 11.33 so yours is 58.48

Thx…just paid and PM’d you shipping address.

Thanks for organizing this GB!!!

Got it - thanks

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