The significant difference with electrical power in a rotating machine is that maximum torque is at zero RPM as long as the current can be supplied (hence the name traction drive). This is the complete opposite of IC engines.
The OHMs law triangle only holds true for basic 'pure' DC circuits. AC is a completely different kettle of fish as power factor (lead or lag) comes into play while frequency and wave shape adds another major game changer.
Many modern drive systems use drives at higher voltages such as the ZERO bikes that use up to 150V battery packs while Tesla cars use 375V packs. The higher voltage allows a much higher charge density. The most advanced motors are an AC/DC compound motor. The stator is AC so the frequency and speed can be infinitely controlled while the rotor is DC to give maximum torque and braking controllability (is that a word).
The electronics will make your eyes water. DC-AC inverters, frequency drives, regenerative braking, torque mapping. A well set up electric drive could easily ripe a frame to pieces due to the massive torque that could be generated.
AH is a basic measure of battery capacity which needs to be considered along with maximum deliverable current, voltage and cell design. You can have a 5.0AH battery at 12 Volts but its maximum deliverable current may be 5amps while another may be a 5.0AH 12V battery with maximum deliverable current of 20Amps.
