Vendor recommendation wanted for ebike parts

Old guy here still working as an engineer, who spent too much for a e-velomobile which breaks every 40 miles or so. My commute is either 18 miles of reasonable roads or 16 miles with some narrow winding parts.

I'm building a velomobile ebike and am running out of time and money. Where can I find a good source for the following parts:
Throttle (for Kelly controller)
contactor
precharge resistor 1k ohm 25 watt. (per Kelly instructions)
48 to 12 volt dc to dc converter (for lights...)
Turn signal switch (preferably self-cancelling)
Locking e-brake handles (do they make any? If not, then I can add some reed switches to the to the brakes.)

I think that I have everything else:
Velomobile
MAC 12T wheel tires and tube strips
Kelly controller
48V 15AH battery
headlights (12v)
LED brake lights with turn signals (12v)

I just want to be sure that I quickly get quality components at a reasonable price.

Should I cross post to parts wantef?

Why are you trying to use a Kelly Controller with a Mac 12 T Motor ?


A good throttle for it will be almost what you could buy a 9 fet controller ( Infineon/Infineon Clone ) for .
https://em3ev.com/shop/9-fet-irfb4110-infineon-controller/
and
then you can just use a $ 10-$20 throttle with cruise control .
Or get at 12 fet controller ... https://em3ev.com/shop/12-fet-irfb4110-em3ev-controller-black/

Or from other vendors, ... http://powervelocity.com/index.php?id_product=54&controller=product ( cost more, but comes with bluetooth for programing with smartphone/tablet, and to use phone as display )

Or from this vendor ... https://www.westcoastelectrics.com/product-category/controllers/page/2/

Locking e brake handles come on trikes usually. In the US, the guy with lots of trike stuff is E-Bikekit.com

PedalPedal said:

Old guy here still working as an engineer, who spent too much for a e-velomobile which breaks every 40 miles or so...

Click to expand...

Overengineering?
Most of your problems can be solved with a KISS (Keep It Stupid Simple)

Old rider here, still working building stone houses, who has done over 30,000 miles with a city commuter that has motorcycle performance, and required buying only brake pads and tires to keep it going.

Thanks for the answers!

As to your question:

ScooterMan101 said:

Why are you trying to use a Kelly Controller with a Mac 12 T Motor ?

Click to expand...

I'm reusing the motor and controller from the old velomobile. The manufacturer didn't install a precharge resistor. The contactor is a 14v, which is working but worries me. They also didn't provide a brake switch connection to the controller. The motor & controller were working fine so I decided to reuse them.

You are the best, thanks again.

MadRhino said:

PedalPedal said:

Old guy here still working as an engineer, who spent too much for a e-velomobile which breaks every 40 miles or so...

Click to expand...

Overengineering?
Most of your problems can be solved with a KISS (Keep It Stupid Simple)

Old rider here, still working building stone houses, who has done over 30,000 miles with a city commuter that has motorcycle performance, and required buying only brake pads and tires to keep it going.

Click to expand...

Ok, do you have any specific suggestions?

Edit:Hmm, don't need a relay, just a switch, precharge incandescent lamp (still has high current though), SPDT MC switch for turn signals, reed switches for brake lights and controller, 12V battery for lights (or wiring 12v devices in series) and controls, ... Throttle thoughts?

I was thinking about a Magura a while back for a high power e-bike that never got built , from reading some other posts here on E.S. which I do not know where at this moment
The Adaptto had better results than the Magura. This is from what I have read there on E.S. not personal experience.

http://adaptto.com/Products/Controllers/

Looking at the website I do not find a throttle, if not them then a throttle that is made and/or designed in Italy was the one that got the most good reviews .

Best for a high power bike is a plain 15$ half twist throttle
Irbf 4110 mosfets in a plain 200$ controller, with beefed traces and shunt mod
QS 205 H50 V3 motor that you can have direct from the manufacturer for 400 to 500$ shipped depending where you are in the world

Then, high power usually means RC lipo but today's round cells can deliver if you have room for a big battery.
Big wires, big connectors. Unplug when not in use for more than a few days, no need for contactor, the controller on/off circuit is enough. I never used a pre charge resistor, and that is with 24s high C rate lipos and a 18x4110 controller. Good Dc/Dc converter for accessories is a Vicor.

See, you don't need to spend a lot to motorize a high power bike. Put the money where it does matter: High quality components and frame to handle the power and speed.

MadRhino,
Sounds good, thanks.