ROX 01 range extender and charging explained
How the ROX 01's REEV powertrain, MDCU controller and ELECTRIC / e-SAVE / HYBRID modes work, plus AC charging time and the high-voltage safety notice.
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How the REEV system works
ROX describes its MDCU (Multi-Domain Control Unit) as "the brain of the battery + motor + electronic control system": it manages energy across four circuits in real time with precise thermal control and mode switching. The 1.5-litre range extender engine drives a generator only — it never turns the wheels directly. Propulsion always comes from the electric motor(s), fed by the 56.01 kWh battery and, when needed, by the generator.
Three driving modes
- •ELECTRIC — runs on battery power alone, like a regular EV, until the battery is depleted
- •e-SAVE — the range extender engine runs to hold or build battery charge in reserve (for example, before entering an EV-only zone later in the trip)
- •HYBRID — the system sensesd road conditions in real time and automatically blends battery and range-extender power for the best efficiency
AC charging
| Spec | Value |
|---|---|
| Charging port | CCS Type 2 |
| AC (7 kW home/wallbox charger) | 0-100% in about 8.6 hours |
An independent review has reported DC fast charging from 20-80% in roughly 24-30 minutes; ROX has not published an official DC charging curve on the pages checked for this guide, so treat that figure as third-party, not manufacturer-confirmed.
The high-voltage battery, charging system and range extender engine must only be inspected, serviced or repaired by an authorized ROX service center. Do not attempt to open the battery pack, charging port wiring or range-extender engine bay yourself — high-voltage components can cause serious injury or death even when the vehicle is switched off.
Frequently asked questions
What does REEV mean and how is it different from a plug-in hybrid?
REEV (range-extended electric vehicle) always drives the wheels with the electric motor(s); the small engine only ever charges the battery via a generator. Some plug-in hybrids can send engine power directly to the wheels — the ROX 01's engine never does.
What is the MDCU?
ROX's Multi-Domain Control Unit — the controller that manages the battery, motors and thermal system together in real time, and switches between the three driving modes.
What are the three ROX 01 driving modes?
ELECTRIC (battery only), e-SAVE (engine holds/builds battery charge in reserve) and HYBRID (automatic blend for efficiency).
How long does it take to charge the ROX 01 on a home AC charger?
About 8.6 hours from empty to full on a 7 kW AC charger.
What type of charging port does the ROX 01 use?
A CCS Type 2 port.
Can I charge the ROX 01 like a normal EV even though it has an engine?
Yes — plug in via the CCS Type 2 port as you would any EV; the range extender engine is only used while driving, not while charging.
How fast is DC fast charging?
An independent review reported roughly 24-30 minutes for 20-80%, but ROX has not published its own official DC charging figures on the pages reviewed for this guide.
Can I service the high-voltage battery or charging system myself?
No. These are high-voltage systems that can cause serious injury even with the vehicle off. Any inspection, repair or service must go through an authorized ROX service center.
Sources for this guide
This guide is for informational purposes only. Always consult an authorised service centre for safety-critical repairs. AutoTechHelp is not liable for any damage resulting from the use of this information.