The ASI BAC8000 is a high-power AC motor controller – an inverter – built for top-tier commercial electric vehicles. It drives Sur-Ron and Talaria class electric motorcycles as well as powerful electric bicycles. The controller operates across a 36-72 V range. Moreover, it delivers 750 A rated current and 840 A peak current.
This unit converts battery DC into three-phase AC. In doing so, it governs both motor torque and speed. Control is handled by field oriented control (FOC) together with ASI’s patented adaptive sensorless motor control algorithm. As a result, torque delivery stays smooth from a standstill through full speed.
The BAC8000 sits at the top of the ASI BAC series, above the BAC4000 and BAC2000. Therefore it suits the most demanding high-power drive systems. Its sub-compact housing fits frames with limited space. Sealing is rated IP65, and IP67 is reached with sealed connectors. Every unit passes a 100% end-of-line test under load. The wiring harness for the ASI BAC8000 is sold separately.
Key Benefits
- Field oriented control (FOC) – precisely steers the motor current vector, so torque arrives evenly instead of in steps.
- Sensorless motor control – the motor starts and runs without position sensors, which keeps the installation simpler.
- Adaptive sensorless startup – the algorithm adjusts to motor load from the very first rotation.
- Up to 120% of rated locked rotor torque – the controller exceeds the motor’s rated torque without extra sensors.
- 750 A rated and 840 A peak current – ample headroom for the most demanding high-power builds.
- Automatic tuning – the controller identifies motor parameters on its own, so setup takes less time.
- IP65 protection, IP67 with sealed connectors – suitable for riding in rain and mud.
- TTL and Bluetooth protocols – both wired and wireless data links are supported.
- Sub-compact housing – fits into frames where controller space is tight.
Who Is This Controller For?
The BAC8000 is intended for the Sur-Ron Light Bee, Sur-Ron Light Bee X, Talaria Sting, Talaria Sting R, Talaria MX3, Talaria MX4 and other electric motorcycles in this class. In addition, it serves commercial grade electric bicycles and light electric vehicles.
This controller fits riders building a high-power drive system from scratch. Equally, it suits anyone replacing a stock controller with something stronger. Thanks to its 750 A rated current, it steps in where a BAC4000 or BAC2000 runs out of headroom.
The BAC8000 also appears in OEM projects. Typical uses include electric mopeds, cargo electric bicycles and industrial light electric vehicles. Above all, it is aimed at experienced builders, because programming is required before the unit will run a motor.
What’s in the Box
- ASI BAC8000 motor controller – 1 pc.
- Wiring harness – not included, sold separately.
- BACDoor app login credentials – not provided.
Technical Specifications
| Model | ASI BAC8000 |
| Manufacturer | ASI (Accelerated Systems Inc.) |
| Type | AC motor controller / inverter |
| Rated voltage | 36-72 V |
| Rated current | 750 A |
| Peak current | 840 A |
| Control method | Field oriented control (FOC) |
| Sensorless startup | Adaptive |
| Automatic tuning | Yes |
| Maximum torque | Up to 120% of rated locked rotor torque |
| TTL | Yes |
| Additional protocols | TTL + Bluetooth |
| Ingress protection | IP65 (IP67 with sealed connectors) |
| Quality control | 100% EOL test under load |
| Housing | Sub-compact |
| Wiring harness | Sold separately |
Why Choose the ASI BAC8000?
The BAC8000 is the flagship of the ASI BAC series. Unlike the BAC2000 and BAC4000, it targets the highest commercial tier of electric bicycles and motorcycles. Consequently, it supplies more current to drive systems that demand it.
Sensorless operation removes the hall sensor wiring from the build. That means fewer connections to fail on a Sur-Ron or Talaria chassis exposed to trail conditions. Automatic tuning then shortens commissioning, since the controller learns motor parameters itself rather than requiring manual entry.
Build quality is verified rather than assumed. Each controller is tested at 100% end of line under load before shipping. Combined with IP65 sealing and a sub-compact case, the unit handles wet, dirty riding inside tight frame packaging.
Frequently Asked Questions
Does the ASI BAC8000 fit a Sur-Ron Light Bee X?
- Yes. The BAC8000 is used on the Sur-Ron Light Bee and Light Bee X.
- Programming is required, so the swap suits experienced builders.
Will it work with Talaria Sting and MX4 models?
- Yes. It is applied to the Talaria Sting, Sting R, MX3 and MX4.
- It also runs commercial grade electric bicycles and light electric vehicles.
Is a wiring harness included?
- No. The harness is sold separately.
- BACDoor app login credentials are not supplied either.
Does the controller need position sensors?
- No. It runs ASI’s adaptive sensorless algorithm.
- Startup adapts to motor load from the first moment.
How much current can it deliver?
- 750 A rated current and 840 A peak current.
- It operates on battery packs from 36 V up to 72 V.
How does it compare to the BAC4000 and BAC2000?
- The BAC8000 sits above both models in the ASI BAC series.
- Choose it when 750 A of rated current is needed.
Is it waterproof enough for trail riding?
- Protection is rated IP65 as standard.
- With sealed connectors, the rating reaches IP67.
How do I connect to the controller for setup?
- TTL and Bluetooth protocols are both supported.
- Automatic tuning identifies motor parameters during commissioning.
The ASI BAC8000 brings 750 A of rated current, FOC precision and adaptive sensorless control into a housing small enough for a Sur-Ron or Talaria frame. Every unit ships after a 100% EOL load test. Order the wiring harness alongside it to complete your build.
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