We are talking about single 250W motor with 48V battery and 20A controller.Two motors working at the same time? That not legal to start with.
We are talking about single 250W motor with 48V battery and 20A controller.Two motors working at the same time? That not legal to start with.
48V x 20A is hardly a 250W of continuous power. Or am I missing something?Yes. The regulation is on which motor you can use, not how you use it.
48V x 20A is hardly a 250W of continuous power. Or am I missing something?
Yes, you are missing something - the understanding of the regulation. There is no regulation on continuous power. It's on the rated power.48V x 20A is hardly a 250W of continuous power. Or am I missing something?
One suggestion is to get two smaller batteries and wire each independently to the two controllers. You fit pedal assist with display on the rear motor and a basic throttle kit on the front motor with no pas and the display bypassed .(The front motor then works independently as a sort of throttle controlled booster motor).Can anyone advise a good pre-made battery that will work well for my project?
I think the OP has given up on two motors as in post #17One suggestion is to get two smaller batteries and wire each independently to the two controllers. You fit pedal assist with display on the rear motor and a basic throttle kit on the front motor with no pas and the display bypassed .(The front motor then works independently as a sort of throttle controlled booster motor).
He has already bought the two kits. If he buys the two batteries, he can try out by fitting both kits on the one bike as suggested. Its a flexible option in that he can leave the rear kit on the bike and remove the front kit and fit to a separate bike with suitable (preferably steel) front forks if he so wishes.I think the OP has given up on two motors as in post #17
Looks great ! - on my display / controller it's press and hold the + and - buttons together to set the max assist speed. I'd not thought of putting the controller under the downtube - does it need any weather protection for the controller and connections ? (bag?). What hub motor is it ?As with all best laid plans, mine didn't survive first contact.
My 2-wheel hub motor drive, twist throttle off-road project has turned into a single rear-wheel drive on-road project.
Currently it's working well with the twist throttle and I've posted another thread for advice with PAS.
View attachment 53295
Once I get the PAS working I intend to remove the twist throttle.
It currently max's out at 22MPH, so my next task will be to figure out how to restrict it to 15.5MPH...
Hi @Peter.Bridge,Looks great ! - on my display / controller it's press and hold the + and - buttons together to set the max assist speed. I'd not thought of putting the controller under the downtube - does it need any weather protection for the controller and connections ? (bag?). What hub motor is it ?
It's quite important to make sure that the top end is sealed, and better to leave a drain hole at the bottom in case it isn't. If you're worried about water getting in the drain hole, put a bit of thin plastic tube in the hole.Hi @Peter.Bridge,
Thanks, I'll try that out on my display.
I'm not 100% sure on the weather protection, I've seen lots of people buy a box to put the controller in. My thinking is that the two end plates have rubber gaskets, so in principle are water-proof. That leaves the cable entry point which has a rubber grommet but looks a bit baggy around the cables, so I positioned the controller facing down and to the rear, so shouldn't suffer from spray off the front wheel and water from above should flow down the cables and not inside the box. Time will tell I guess...
I'm using a Bafang RM G020.250.DC motor
I have 2 menus on my display one is hold + and- buttons and one is hold + and - buttons and repeatably press power (8 times?), think the max assist speed is on the first menu (use + and - to adjust and power button to toggle through options. I'm wondering if it is already set to 35km/h, I would expect that motor with a full 48v battery to have a higher unrestricted PAS top speed, unless it is a really high winding.Hi @Peter.Bridge,
Thanks, I'll try that out on my display.
I'm not 100% sure on the weather protection, I've seen lots of people buy a box to put the controller in. My thinking is that the two end plates have rubber gaskets, so in principle are water-proof. That leaves the cable entry point which has a rubber grommet but looks a bit baggy around the cables, so I positioned the controller facing down and to the rear, so shouldn't suffer from spray off the front wheel and water from above should flow down the cables and not inside the box. Time will tell I guess...
I'm using a Bafang RM G020.250.DC motor
That's like the Freego ones. I'm not sure about yours, but some have two speed limits: One for the throttle and the other for the pedal assist.I have 2 menus on my display one is hold + and- buttons and one is hold + and - buttons and repeatably press power (8 times?), think the max assist is on the first menu (use + and - to adjust and power button to toggle through options. I'm wondering if it is already set to 35km/h, I would expect that motor with a full 48v battery to have a higher unrestricted PAS top speed, unless it is a really high winding.