advise with kit needed

[ade]

hi all a couple of questions some of you maybe to answer ,just received a 36v 350w e-bike kit from bms battery one thing i overlooked before i bought it was the fact it only comes with a 250w controller is there a reason for this or is it just cost ? i have a spare 450w controller i can use and didn't want to use it in case it caused some damage also i have connected up the power key wire to a switch it turns the controller on/off but when the battery is disconnected/connect it sparks at the power pole connecter even though the controller is switch off have i done something wrong?

 

[banbury frank]

Hi that's normal you always get a spark as the main capacitor in the controller charges

Frank

 

[amigafan2003]

As Frank says, spark is ok.

You can use the 450w controller - just be aware it's not strictly legal in the UK (but neither are kits actually)