ASI BAC855 Controller Upgrade for INOKIM OX Electric Scooters

The ASI BAC855 controller upgrade is a sinusoidal FOC (field-oriented control) motor controller built for INOKIM OX electric scooters. It fits three models: the OX ECO, the OX HERO and the OX SUPER. The unit measures 81 x 55 x 39 mm and weighs 300 g. Every connector arrives pre-fitted, so no soldering or rewiring is needed.

This controller physically replaces the stock INOKIM OX unit. All plugs match the original wiring harness exactly. Installation stays simple: open the scooter deck, lift out the old controller and drop the new one in its place. The compact housing slides straight into the original OX floor cavity.

We have worked with this controller for more than five years. Because of that, each unit ships already configured for the battery you specify. The scooter also pulls away from 0 km/h, so kick-starting becomes unnecessary. Riders who want stronger torque and a higher top speed on private land will get the most from this upgrade.

Key Benefits

• Plug and play fitment – every connector matches the original INOKIM OX harness, so soldering is not required.
• Sinusoidal FOC control – the ASI BAC855 spins the motor smoothly and quietly while torque climbs noticeably.
• Take-off from 0 km/h – the scooter moves without a kick, unlike the factory controller.
• Compact housing – at 81 x 55 x 39 mm and just 300 g, it fits the standard OX deck recess.
• Wide voltage window – the controller runs on batteries from 48 V up to 72 V.
• Motor overheat protection – motor temperature is monitored, and power drops once the limit is reached.
• Battery preservation – output is reduced automatically as the pack’s charge falls.
• Power tuning from the display – you set assist levels in percentages yourself, with no extra hardware.

Who Is This For?

This controller suits three versions of the INOKIM OX electric scooter: the OX ECO, the OX HERO and the OX SUPER. With a stock battery and no further work, it runs on the OX SUPER fitted with the 60 V 21 Ah pack. Owners of the OX ECO and OX HERO must move to a stronger battery first.

That said, the controller can still be configured for original packs at lower output. The factory OX ECO 48 V 13 Ah battery delivers 1520 W. The factory OX HERO 60 V 13 Ah battery delivers 1835 W. Both setups gain the smoother sinusoidal drive even at these figures.

The upgrade targets riders chasing more torque and a higher maximum speed within closed areas. For EU buyers, we also supply an extra connector that caps the speed at 25 km/h. This connector clips off and back onto the controller in seconds.

What’s in the Box?

• ASI BAC855 controller – supplied with matching connectors and configured for the battery you specify.
• Aluminium motor heatsink (optional) – available in orange or black, with a NONE option if extra cooling is not wanted.
• Speed limiting connector (EU version) – restricts the controller to 25 km/h.
• Remote programming session – a private tuning call with our engineer.

Technical Specifications

Why Choose This Upgrade?

The controller reaches you already configured for your specific battery. Therefore no programming tools, cables or software are needed on your side. You simply fit it and ride.

All speed figures listed above were measured on real rides with a 65–67 kg rider. Those numbers reflect actual road testing rather than theoretical calculations. Phase current reaching 106 A explains the sharper acceleration you will feel from a standstill.

In addition, every buyer receives a private remote programming session. During that call our engineer adjusts assist levels, power limits and ride feel to your preference. Display support covers both the 750C and the Eggrider V2, so parameters stay adjustable afterwards.

Frequently Asked Questions

Will the ASI BAC855 fit my INOKIM OX without modifications?

• Yes, all connectors match the original INOKIM OX wiring harness.
• No soldering, splicing or harness rework is required.
• The 81 x 55 x 39 mm housing fits the standard deck cavity.

Which INOKIM OX models are supported?

• OX ECO, OX HERO and OX SUPER are all supported.
• Only the OX SUPER with the 60 V 21 Ah battery runs at full output on the stock pack.
• OX ECO and OX HERO need a stronger battery for higher power figures.

Can I keep my original battery?

• Yes, the controller is configured for lower power in that case.
• The 48 V 13 Ah OX ECO pack gives 1520 W.
• The 60 V 13 Ah OX HERO pack gives 1835 W.

How do I install the controller?

• Open the underside of the scooter deck.
• Remove the original controller and unplug it.
• Plug in the ASI BAC855 and close the deck.

Which displays work with this controller?

• The 750C display is supported.
• The Eggrider V2 display is supported.
• Assist levels on the 750C are set at 35 %, 65 % and 100 %.

Is there a version for EU road rules?

• Yes, an EU connector limits the controller to 25 km/h.
• The connector clips on and off the controller easily.
• You can refit it whenever the limit is needed again.

Does the controller protect the motor and battery?

• Motor temperature is monitored, and power is cut back at the limit.
• Output drops automatically as battery charge falls.
• Both functions run without any input from the rider.

What cooling options are available?

• An aluminium motor heatsink in orange is available.
• A black heatsink is also offered.
• Choosing NONE skips the heatsink entirely.

Riders moving from the stock unit to the ASI BAC855 gain smoother sinusoidal drive, stronger torque and take-off from a standstill. Tell us your battery specification when ordering, and the controller arrives tuned and ready for your INOKIM OX.