Bbsxx controller markings, anyone able to decipher ?

Nealh

Esteemed Pedelecer
Aug 7, 2014
7,494
2,855
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West Sx RH
The top number must denote wattage 750w.
Middle one proabably factory producer.
Bottom is date year 2018- month 03 - day 09, 9610 unit #/batch .
 
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KirstinS

Esteemed Pedelecer
Apr 5, 2011
2,675
675
Brighton
Ok, full disclosure

Purchased to replace a 36v 500w bbs02b controller

When fitted it behaved weakly, I hooked to a friends laptop via programme cable and it would only go to 20a max

It looks and behaves like a 250/350w controller in every way

the sitting proud of the potting capacitor also looks small compared to a 500w (no photo)

I just hoped this might be evidenced via the markings
 

wheeliepete

Esteemed Pedelecer
Feb 28, 2016
1,231
401
55
Devon/Dorset
Just had a look at a spare BBS02 750w i have and the letters/numbers don't indicate wattage/amperage in any way. Does seem you have a 250/350 if the amperage won't go over 20.
 

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