Is it possible to use this controller: http://www.ebay.com/itm/3-36V-15A-H-Bridge-Dual-DC-Motor-Driver-30A-for-Robot-Car-Compatible-for-Arduino-/330908150016?pt=LH_DefaultDomain_0&hash=item4d0ba9a900
with this motor at 36v? http://www.ebay.com/itm/48-Volt-1000-Watt-Drive-Motor-Scooter-Bike-48V-1000W-/370758427688?pt=Motorcycles_Parts_Accessories&hash=item5652eca428&vxp=mtr
The motor's specs say ~27A at 48V, so about 36A at 36v?
Could I use two controllers in parallel?
If not, can anyone suggest a good controller for this motor (preferably under $100) that supports braking and reverse?
Thanks 
if you reduce the voltage the current will go down not up
so it will be approx 20A at 36 volts
still too much for a 10 A controller
any attempt to use two in parallel will release large quantities of magic smoke at great speed
do not try this at home (or anywhere else)
Google electric scooter parts for high current motor controllers. It may be possible to parallel MOSFET based H-bridges.
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gizzmotronics:
Is it possible to use this controller: http://www.ebay.com/itm/3-36V-15A-H-Bridge-Dual-DC-Motor-Driver-30A-for-Robot-Car-Compatible-for-Arduino-/330908150016?pt=LH_DefaultDomain_0&hash=item4d0ba9a900
with this motor at 36v? http://www.ebay.com/itm/48-Volt-1000-Watt-Drive-Motor-Scooter-Bike-48V-1000W-/370758427688?pt=Motorcycles_Parts_Accessories&hash=item5652eca428&vxp=mtr
The motor's specs say ~27A at 48V, so about 36A at 36v?
Could I use two controllers in parallel?
If not, can anyone suggest a good controller for this motor (preferably under $100) that supports braking and reverse?
Thanks
Motor manufacture URL caution slow link
Copy of specification:
correction: 20/0-->20.0A, My guess motor is 500W. You might need modify the title to "0.5kw motor and controller"
Siemens/Infineon
High Current PN Half Bridge NovalithIC could be good candidate here, at least for 24V power supply.
BTS 7960B/BTS 7965B/BTS 7970B
BTS 7960B 45V/43 A, 7 m? + 9 m? typ
BTS 7970B 45V/68 A, 7 m? + 9 m? typ
Siemens/Infineon power mosfet is my favor. But it only stayes with power logic mosfet, other type power mosfet, i.e. Audio, RF, high voltage... is different story.