Sur-Ron BAC8000 upgrade kit · Light Bee X and L1e · ASI BAC8000
The big controller: 18.5 kW on the stock motor, 32 kW when you are ready for a motor swap.
The Sur-Ron BAC8000 upgrade kit puts an ASI BAC8000 on the Light Bee with a loom that plugs straight into the bike. On the original 60V battery it is set to 5 kW. Bypassed, 7.2 kW. On a 60V high current battery it runs 15 kW, and on 72V it reaches 18.5 kW with the stock motor. Change the motor and the same controller has 32 kW in it.
Nothing is soldered and nothing is cut. You unplug the old controller, plug in the new loom, and an ElectricGen engineer tunes the BAC8000 to your setup in a remote session that comes with the kit.
What the Sur-Ron BAC8000 upgrade kit changes on the bike
The BAC8000 is the controller people fit when the BAC4000 is not the end of the road. It has the current reserve for a motor swap later, and it makes the stock motor feel like a different class of bike today.
Torque
Pull that keeps coming
With up to 700 A of phase current available, the BAC8000 never runs out of push in the middle of a hill. The rear wheel responds to the throttle instantly and keeps responding.
Headroom
Built for the next motor
On the stock motor it is set to 18.5 kW at most. Fit a motor such as the Sotion 26 kW motor for the Light Bee and the controller is re-tuned for up to 32 kW without being replaced.
Settings
Yours to change
Power, assist levels in percent, wheel size for accurate speed, km/h or mph. With FabiRide Dash Pro you change them from the bars. With any other display, our engineer sets them with you.
Heat
Motor temperature protection
The controller watches motor temperature and trims power before heat becomes damage. The optional radiator keeps the BAC8000 itself cooler when you use the high settings.
Battery
Protection for a tired pack
When pack voltage sags, the controller pulls power back on its own, so an old battery is not pushed into a cut-out mid ride.
Loom
Made for the Light Bee plugs
Our harness carries the stock throttle, brake sensors, motor phases and battery plug to the ASI. Everything clicks together with the connectors already on the bike.
Power by battery: 5 kW to 32 kW
The controller is the same in every Sur-Ron BAC8000 upgrade kit. What changes is how hard we let it pull, and that depends on your battery and, at the top end, on your motor.
| Battery | Controller setting | Notes |
|---|---|---|
| 60V original Sur-Ron battery | 5 kW | The stock BMS limits current. This is the safe ceiling for an untouched pack. |
| 60V bypassed battery | 7.2 kW | The bypass kit routes power around the stock BMS. More power, but more wear on an ageing pack. |
| 60V high current battery | 15 kW | Needs a pack built to deliver the current, for example our 60V 70Ah High Power Sur-Ron battery. |
| 72V high current battery | 18.5 kW | The stock motor ceiling, on a 72V 50Ah or 72V 55Ah Sur-Ron battery. |
| 72V battery plus upgraded motor | up to 32 kW | Re-tuned for the new motor during a remote session. Ask us before you order the motor. |
How you answer Select your battery depends on the display. With FabiRide Dash Pro choose the range, 60V to 72V, because you set the controller’s battery voltage yourself and change it when you change packs. With Eggrider V2 pick the exact battery you ride, because the controller is tuned for that pack and only a re-tune by us changes it later.
A note on the bypass option: it raises power by removing the current limit that protects the cells. A healthy pack handles it, while an older pack will age faster. Because the BAC8000 asks for a lot of current, a battery built for it is the right partner for the 15 kW and 18.5 kW settings. Our high power packs use the QS8 power harness for the same reason.
Choose your display: FabiRide Dash Pro, Eggrider V2 or your own
The Display option decides what you see on the bars and how much of the ASI you can change yourself. Every Sur-Ron BAC8000 upgrade kit ships tuned and ready to ride whichever display you pick, but only one of them talks back to the controller.
FabiRide Dash Pro
A colour touchscreen that reads the ASI and writes settings back to it, from the bars or from the free FabiRide app. It also carries your phone: calls, messages and music appear on the display. See the full Dash Pro feature list.
Eggrider V2
A compact display with a button that switches the controller on and off and a phone app for the basic readings. A good fit if you want the power and not the screen. Eggrider V2 details.
Already running an Eggrider V2? Choose “I will use my own Eggrider V2” and the kit ships without a display. The APT 750C is not offered with this kit at the moment.
What Dash Pro adds to the Sur-Ron BAC8000 upgrade kit
Most displays only show numbers. Dash Pro changes them. On an ASI BAC controller every one of these works, because the display talks to the controller in both directions.
Tune from the bars
Power, speed and assist levels
- Edit the assist levels in percent and the power and speed behind them
- Up to ten riding maps, each with its own speed, power and regen
- Pin one map so the bike always starts there
Battery voltage
Run a 60V or a 72V pack, your choice
- The battery voltage setting is yours to change in Dash Pro, so one kit runs a 60V pack today and a 72V pack next season
- Swap batteries without sending the controller back for reprogramming
- Choose 60V to 72V in the battery selector; that option exists for Dash Pro only
Limiter
A cap you lift with one press
- Set a speed and power ceiling for the road, the kids or a new rider
- Lift it again from the handlebar remote
- Per rider ceilings stay on the bike
Reverse
Reverse gear from the bars
- Select reverse from the handlebar buttons, the ASI does the rest
- Walk the bike backwards out of a rut or off a trailer
- A live indicator on the dashboard shows when reverse is engaged
Phone on the bars
Calls, messages, music
- Answer or reject calls from the handlebar remote
- Read incoming messages on the display
- Skip tracks and change volume without touching the phone
Safety and trips
Crash detection and ride history
- Crash detection sends an SOS with your location to your emergency contacts
- Every ride is recorded with its route on a map
- Full statistics per trip in the app
Reverse gear is one more thing Dash Pro adds on the Light Bee. Select it from the bars and the bike walks backwards out of a rut, a trailer or a tight garage instead of you dragging it.
The FabiRide app is free on iPhone and Android, and the same account opens in any browser. Settings and ride history live in the account, so a new phone loses nothing.
01
Set up
A short wizard connects the display to the ASI and asks only about things your bike has.
02
Tune
Riding maps, battery voltage, assist levels, throttle and brake feel, all written to the controller.
03
Share
Add riders with their own ceilings. The bike remembers who is on it.
What is in the box
Pick the options you need in the selector above and the Sur-Ron BAC8000 upgrade kit arrives complete. Nothing else is required to ride.
Controller
ASI BAC8000
Tuned for your battery before it ships, then fine tuned with you in the remote session.
Harness
Plug and play Sur-Ron loom
Phase leads, battery lead, throttle, brakes and display on the connectors the Light Bee already uses.
Display
Your choice
FabiRide Dash Pro, Eggrider V2, or none if you already own an Eggrider V2.
Mounting
Controller bracket
Holders that put the BAC8000 where the stock controller sat.
Optional
Controller radiator
A finned heatsink for the controller. Recommended with the 15 kW and 18.5 kW settings.
Optional
Regen thumb throttle
A second thumb lever for regenerative braking, so you slow the bike and put charge back without touching the brakes.
Optional
Bypass kit
For the 7.2 kW setting on the stock 60V battery. Read the battery note above before you tick it.
Fitting the Sur-Ron BAC8000 upgrade kit
01
Remove the stock controller
Lift the battery, disconnect the plugs on the stock controller and take it off its mount. No connector is cut.
02
Plug in the loom
Every lead on our loom ends in the plug the Light Bee already has: throttle, brake sensors, motor phases, battery and display. Match colour to colour and click.
03
Mount and route
Sit the BAC8000 in its bracket where the old controller was, add the radiator if you chose it, and route the display lead to the bars.
04
Remote tuning session
Book the session that comes with every kit. An ElectricGen engineer connects to the controller, checks your installation, and tunes the settings to your battery, your riding and your terrain.
Keep it dry. The controller and its white signal connector must be protected from dirt and water during and after the installation. Water inside that connector is the one failure the kit cannot protect itself against.
Sur-Ron BAC8000 upgrade kit specifications
| Item | Detail |
|---|---|
| Controller | ASI BAC8000 (manufacturer page) |
| Motor control | Direct field oriented control, sensorless, auto tuning |
| Input voltage, manufacturer rating | 24 to 72 VDC |
| Peak phase current, manufacturer rating | 700 A |
| Kit power settings, stock motor | 5 kW, 7.2 kW, 15 kW or 18.5 kW depending on battery |
| With an upgraded motor | Up to 32 kW |
| Battery | 60V or 72V pack; with FabiRide Dash Pro any pack from 60V to 72V |
| Communication | CAN bus and TTL to the display; Dash Pro reads and writes settings |
| Fits | Sur-Ron Light Bee X and Light Bee L1e |
| Displays | FabiRide Dash Pro, Eggrider V2, or your own Eggrider V2 |
| Installation | Plug and play, no soldering, no cutting |
| Tuning | Remote session with an ElectricGen engineer, included |
Questions before you order
BAC4000 or BAC8000 for my Sur-Ron?
If you keep the stock motor and 15 kW is enough, the Sur-Ron BAC4000 upgrade kit does it for less. Choose the BAC8000 if you want 18.5 kW on the stock motor now, or a motor swap and up to 32 kW later without buying a second controller.
Does the Sur-Ron BAC8000 upgrade kit work on the stock 60V battery?
Yes, at 5 kW, or 7.2 kW with the bypass kit. The 15 kW and 18.5 kW settings need a battery that can deliver the current, such as our 60V 70Ah High Power or 72V Sur-Ron packs.
Do I have to solder, cut or reflash anything?
No. The Sur-Ron BAC8000 upgrade kit uses the connectors already on the Light Bee, the controller arrives tuned, and the display plugs into the loom. Fitting is a matter of unplugging the old controller and plugging in the new one.
Can I change the battery voltage myself?
With FabiRide Dash Pro, yes. The battery voltage setting is on the display and in the app, so one kit runs a 60V pack and a 72V pack, which is why Dash Pro orders use the 60V to 72V option. With an Eggrider V2 the kit is tuned for the battery you pick at checkout; contact us and we re-tune it remotely when you change packs.
What happens when I upgrade the motor?
Book a remote session. We re-tune the BAC8000 for the new motor, up to 32 kW with a suitable 72V battery. The controller, loom and display of the Sur-Ron BAC8000 upgrade kit stay.
Is the radiator necessary?
Not for the 5 kW and 7.2 kW settings. At 15 kW and above we recommend it, because the controller then works hard on long climbs and in hot weather. It bolts onto the BAC8000 and needs no extra wiring.
Related to the Sur-Ron BAC8000 upgrade kit: Sur-Ron BAC4000 upgrade kit · FabiRide Dash Pro display · BAC4000 and BAC8000 radiator · Sotion 26 kW motor · Sur-Ron batteries · all Sur-Ron controllers and electronics
Eric –
If are looking for an upgrade this is an excellent choice. The performance increase is definitely worth the money.