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The ASI BAC2000 is an entry-level high-power compact sinusoidal FOC motor controller from Accelerated Systems Inc., rated 2000W continuous at 48V with 200A peak phase current over a 24-72V nominal range. It uses hall-start/sensorless commutation with auto-tuning and is configured over ASI's BACDoor serial software (TTL-232/CANopen, optional Bluetooth). Popular for high-power e-bike, off-road, e-moped, and small utility-vehicle builds; widely used with CYC X1 Pro mid-drive kits.

In brief: 24–72V controller. 80A continuous. 100A peak. FOC, dual mode, regen, field weakening, self-learning support. From $368.

Where to Find

Prices tracked across 1 seller

Specifications

Type

VESC Based
No
Cooling
Air

Electrical

Voltage Range
24–72V
Continuous Amps
80A
Peak Amps
100A
Max Phase Amps
200A

Motor Features

Regen Support
Yes
Drive Mode
FOC
Sensor Mode
Dual Mode
Field Weakening
Yes
Self-Learning
Yes
Dual Motor Support
No
Controller Pairing
No

Inputs

Throttle Support
Yes
PAS Support
Yes

Display

Supports Display
Yes
Requires Display
No
Protocols
ASI/Grin (ModBus)

Power Switch

Supports Power Switch
Yes
Requires Power Switch
No
Requires Pre-charge
No

Programming

Via Display
No
Via Phone
Yes
Via PC
Yes

Physical

Weight
1.02 kg
Dimensions (L×W×H)
125mm × 126mm × 49mm
IP Rating
IP55

Ports & Connectors

Battery Input2-position Screw Terminal Block
Power
1Battery +
2Battery -
Motor Phases3-position Screw Terminal Block
Motor Phase
1Phase A
2Phase B
3Phase C
Hall Sensor
Hall SensorTemperature
15V Power
2Ground
3Hall A
4Hall B
5Hall C
6Motor Temp
Signal / Comm
UARTPASBrakeThrottlePower SwitchCAN Bus
1None
2None
3UART TX
45V Power
5PAS Signal
6Brake Signal (Low)
7Throttle Signal
85V Power
9E-Lock / Ignition
10CAN Low
11CAN High
12None
13UART RX
14Ground
15Ground
1612V Power

Resources

Official ASI Page

Manufacturer Page<div class="calc-height pb-2"> <p>The BAC2000 is a high-power density compact Electric Motor Controller / Inverter. Units are optimized for the latest Lithium Ion Battery Technology and designed with the latest in Field-Oriented Vector Control (FOC) as well as ASI’s proprietary Adaptive Sensorless Start Algorithms. ASI Controllers feature auto-tuning and are capable of delivering up to 120% of a Motor’s rated maximum locked rotor torque without the need for complicated position sensors. The BAC2000 delivers an entry-level high-power controller for utility vehicles and related equipment.</p> <div class="buttons black"><a rel="noopener" href="https://support.acceleratedsystems.com/BAC6/tech_specs/mechanical_drawings/" target="_blank" class="btn asi--link">Technical Drawings</a></div> </div> <div class="p-hider"></div> <div class="tab-pane fade show active" id="power" role="tabpanel"> <table border="0" class="table mb-5"> <tbody> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Nominal Input Voltage</strong></th> <td style="width: 407px; height: 47px;">24 to 72VDC</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Peak Phase Current</strong></th> <td style="width: 407px; height: 47px;">200A</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Continuous Electrical Output Power @ 20°C Ambient</strong></th> <td style="width: 407px; height: 47px;">2000W @ 48V</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Motor Control Model</strong></th> <td style="width: 407px; height: 47px;">Direct Field-Oriented Control</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Supported Motor Types</strong></th> <td style="width: 407px; height: 47px;">3-Phase Permanent Magnet</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Supported Motor Sensor Types</strong></th> <td style="width: 407px; height: 47px;">Sensorless, 120° Electrical Halls, Sine/Cosine Encoder</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Operating Ambient Temperature Range</strong></th> <td style="width: 407px; height: 47px;">-20 to 50°C</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Inrush current limit</strong></th> <td style="width: 407px; height: 47px;">60A</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Communication Protocols</strong></th> <td style="width: 407px; height: 47px;">TTL, CANBus, Optional BT</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Inputs</strong></th> <td style="width: 407px; height: 47px;">3x Halls, 2x Digital, 4x Analogue</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Outputs</strong></th> <td style="width: 407px; height: 47px;">Hall 5V, 5V, 12V, Low-Side Switch</td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Mating I/O Connectors</strong></th> <td width="283" valign="bottom" style="width: 407px;"><span>Molex 334716001 (6-pin)</span><br aria-hidden="true"><span>Molex 334721601 (16-pin)</span></td> </tr> <tr style="height: 47px;"> <th class="dark-cell" style="width: 388px; height: 47px;"><strong>Power Terminals</strong></th> <td style="width: 407px; height: 47px;"><span>5x M5-0.8 x 16mm</span></td> </tr> </tbody> </table> <p>&nbsp;</p> </div> <div class="tab-pane fade" id="qual" role="tabpanel"> <ul> <li>RoHS</li> <li>Engineered in Canada</li> </ul> </div> <div class="tab-pane fade" id="application" role="tabpanel"> <ul> <li>eScooters</li> <li>Off-road electric bikes</li> <li>eMoped</li> <li>Small utility vehicles</li> </ul> </div>

Frequently Asked Questions

Alternative Controllers

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