Ebike motor wattage check

[Sepia]

Gooday All

Is there anyway of checking the size of my supplied ebike motor?

I am under the suspicion I have perhaps been undersupplied motor wise but do not know how to check what the wattage rating is.

Appreciate any help?

Edited 4 hours ago by Sepia

[ChrisF]

Cops in Netherlands have a dyno to test the power at the wheel ....

 

Doubt anything like that, bike size, is available locally.

 

 

Real option .... check the settings via the app .... 

[MongooseMan]

Thinking out loud:
Power meter pedals/power meter crank = your output

Stick it on a smart trainer  = total output

Difference = Motor output (more or less)

 

Of course, that requires access to power meters and a smart trainer.

[The Ouzo]

does the motor not have any markings/serial number/ et al. Could maybe use this to check with the manufacturer.

[love2fly]

16 minutes ago, MongooseMan said:

Thinking out loud:
Power meter pedals/power meter crank = your output

Stick it on a smart trainer  = total output

Difference = Motor output (more or less)

 

Of course, that requires access to power meters and a smart trainer.

I don't think that will be accurate enough. Also, if something is rated at 500w,  that would be at best, under ideal circumstances, then there's frictional losses everywhere. Then, how accurate is a powermeter actually? Just like a dyno, you can't compare one dyno with another, it's more for before and after. True test night be to check how much current the motor pulls and compare that to others. If OP suspects the wrong motor was installed, removing and checking code or serial no will decide that one.

[ChrisF]

2 hours ago, love2fly said:

I don't think that will be accurate enough. Also, if something is rated at 500w,  that would be at best, under ideal circumstances, then there's frictional losses everywhere. Then, how accurate is a powermeter actually? Just like a dyno, you can't compare one dyno with another, it's more for before and after. True test night be to check how much current the motor pulls and compare that to others. If OP suspects the wrong motor was installed, removing and checking code or serial no will decide that one.

 

And to make things more interesting ....

 

Giant's settings works on user input multiplied by a factor, to a max of 250W.

 

Specialized apparently works on a % assist at the various settings ....

 

 

You would need to understand the operating system, the settings for the assist, before you know when the motor is supposed to give max assist.

 

But wait, theres more .... with Giant each assist level also determines how fast the power kicks in .... so even though you access to 250W, it ramps up slower in the lower assist levels, on boost it KICKS IN !!

 

 

 

After a service my Giant felt different .... they upgraded the software, which reset the assist levels.  Once I realised what happened I changed it back via the app

Edited 59 minutes ago by ChrisF

[love2fly]

3 minutes ago, ChrisF said:

 

And to make things more interesting ....

 

Giant's settings works on user input multiplied by a factor, to a max of 250W.

 

Specialized apparently works on a % assist at the various settings ....

 

 

You would need to understand the operating system, the settings for the assist, before you know when the motor is supposed to give max assist.

 

But wait, theres more .... with Giant each assist level also determines how fast the power kicks in .... so even though you access to 250W, it ramps up slower in the lower assist levels, on boost it KICKS IN !!

 

 

 

After a service my Giant felt different .... they upgraded the software, which reset the assist levels.  Once I realised what happened I changed it back via the app

Yikes....... if I owned an e-bike I'd have it deredtricted and boosting to the max! 😁