52V controller on 48V BBSHD? Bad idea?

[regan03]

I need to change the controller and the vendor told me he only has 52V controllers which is not suitable for a 48V motor.

I thought both 48v and 52v controllers could work on a 48v bbshd.

Any idea? I would rather not fry the controller/motor. Is it a badea idea to put 52v controller on 48v motor?

 

[docw009]

The 52V controller. if done properly, would have a low voltage shut off around 43V, while your typical 48V controller is set at 40V. If you have a very good 48V battery that doesn't sag, you would lose some useable range.

Just a random pick of aliexpress sellers. They show all the part numbers at the bottom of the page.

 

[regan03]

The 52V controller. if done properly, would have a low voltage shut off around 43V, while your typical 48V controller is set at 40V. If you have a very good 48V battery that doesn't sag, you would lose some useable range.

Just a random pick of aliexpress sellers. They show all the part numbers at the bottom of the page.

My battery is 52V.
But my main concern in my case is frying the controller or the motor. That's not really possible right?

 

[docw009]

I always thought the BBSHD controllers were 1500W with 30A current? If they are now 1000W, that's only 20A. Maybe Bafang has pulled back on the power.

My 2016 BBS02 will pull 25A per my wattmeters, but .a 2023 BBS02 I installed last year only maxed out at 18A. I didn't worry about it, as it was for a friend. It might have been possible to change the settings,

 

[regan03]

I always thought the BBSHD controllers were 1500W with 30A current? If they are now 1000W, that's only 20A. Maybe Bafang has pulled back on the power.

BBSHDs are 1000W with 1500W peak. And 30A or 28A current depending on the type of controller (48V or 52V).

 

[chuyskywalker]

People run the BBSHD at 72v without physically changing the motor; they're quite fine at 52

 

[Whataboutmike]

I need to change the controller and the vendor told me he only has 52V controllers which is not suitable for a 48V motor.

I thought both 48v and 52v controllers could work on a 48v bbshd.

Any idea? I would rather not fry the controller/motor. Is it a badea idea to put 52v controller on 48v motor?

I know this is an old post but just to make sure you all know, Bafang never made controllers that were separately rated at 52v and 48v, they are only rated at 48v but can handle the higher voltage of 52v, that's because fully charged its 58.9v so under the max 60v it can handle. So if you are in any doubts if you can use a 52v battery on the 48v rated bbshd, yes is the answer and how can i say this, well i have the Em3ev 52v 20ah and have been running it on a non-modded bbshd for a year or so now. Does the 52v feel any different to a 48v, yes it does, you will notice more instant power kick in harder and it does top my 500c display over the 1000w reading, not sure but it doesn't go above 1200w though, maybe it's the limit on the 500c. So your vendor is lying to you btw, just buy a 48v controller if you need a new one.