I'm building my own e-assist tadpole trike and in the process of buying a motor that for scootors. This motor is 48v 1000w. How do i go about getting a contoller for this motor that can handle the amp when it get put under loads like climbing a steep hill? I'm gearing this thing to run around 1600 rpm to 2400 rpm.The neat thing about my set up is that I can change the geasr to pull more for hill climbing or more top end. It will have a jackshaft for it..
Thanks.

I have a tadpole trike with a rear 9Continent Direct drive hub motor on the back, at 48V nominal, and peak power around 1300 watts. I'm using a cheap 12 mosfet "universal" controller from bmsbattery.com It is universal in the sense that you can run it with or without Hall sensors - I run mine unsensored ("pedal first"), but it requires very little forward motion to engage - a fraction of a mph. Although nominally a 500 watt controller, I see peak amps of over 30 out of it, so my peak power is more likely limited by the bms on my battery.They are rated with 63volt caps so are ok with Ping or Headways which are around 60 volts when fully charged. They're only around 50 bucks, and I like them quite well. I imagine they would work fine on a Goldenmotor or Crystalyte as well. Might be worth a try. Otherwise perhaps an Infineon controller from ebikes.ca or similar vendor like ebikekit or itselectric.ca etc. The ebikes.ca is pre-wired for a Cycleanalyst - I'm using the standalone CA on the bmsbattery controller. I've got three of those controllers which were around 100 bucks total - nice to have a spare.

I like Lyen's controllers. He's a guy over at the ES forums and he makes good stuff.

I run my 9c direct drive hub motor in the back up to around 1800 watts and the controller and motor are fine...slightly warm but not too bad.

top speed is about 33-35 mph.