View source for Gen2/Regen

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Regen refers to [[Regenerative Braking]]

;Operation
: The Sevcon [[Controller]] can enter a regeneration mode where it captures momentum from the motor and charges the battery.
: The battery must accept incoming power for this feature to work, and the controller must manage the process.

;Operating Range
: Regen for Zeros operates between 12mph (where the motor cannot produce enough voltage to naturally power through the controller) and 4500 RPM (70mph in default gearing).
: This band can be adjusted in [[MBB Console#Settings|MBB settings]].

;Level
: Regen levels are defined/set in terms of percentage of maximum allowable levels, so 0-100%.
: That 100% maps to a 40A recharge limit setting in the Sevcon controller, equivalent to 10% of the maximum discharge rate of a Gen4 size 4 controller.
: The 100% setting also corresponds to 60% of the 72Nm torque limit also specified.
: The recharge limit may be set up to 91A via Sevcon setting or higher by a dummy value (65535?).
: Zero sets regen levels to preclude rear wheel lockup, so raising the limit is a risk that ABS cannot directly control.
: Regen has the same effect for SR/DSR models as for S/DS.

;Efficiency
: The recharge efficiency of regen is typically that 10% of the energy used to climb an incline can be returned on the corresponding descent.

;Triggers
*Normal regen is triggered by relaxing the throttle.
*: There is a position just above the resting position where an actual neutral torque is achievable.
*: The [[MBB Console#Settings|MBB has a setting]] in mV for the potentiometer output of the throttle to trigger regen.
*: Adjusting this is not normally effective unless changing throttle types.
*Brake regen is triggered by the same signal that turns on the brake light:
*: A contact switch against the front brake lever will engage the brake light (and regen); the hydraulic piston and the switch engage simultaneously by default.
*: Rear brakes engage pad contact and the brake light (and regen) simultaneously, but require some amount of travel before they engage.
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[[Category:Function]]