The Smart SGE 300 – Electric is a permanent — magnet synchronous electric motor developed by Geely for Smart’s all — electric platform, produced from 2022 to present. It delivers 200 kW (272 PS) and 343 Nm of torque via a single — speed reduction gearbox, enabling 0–100 km/h in under 5.5 seconds. Integrated power electronics and liquid — cooled stator windings support sustained performance and rapid DC charging capability.
Fitted exclusively to the Smart #1 and Smart #3 cros…
Smart
All production years (2022–2025) meet Euro 0 tailpipe emissions (zero-emission vehicle classification) under UK VCA Whole Vehicle Type Approval #VCA/WVT/2022/8876.
The Smart SGE 300 – Electric is a 200 kW permanent-magnet synchronous motor engineered for compact premium EVs (2022–2025). It combines liquid-cooled windings with an integrated inverter and single-speed transmission to deliver instant torque and agile dynamics. Designed to meet EU zero-emission mandates and UK VCA certification, it balances performance with urban efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | N/A (electric motor) | |
Fuel type | Electric | |
Configuration | Permanent-magnet synchronous motor (PMSM), rear-mounted | |
Aspiration | N/A | |
Bore × stroke | N/A | |
Power output | 200 kW (272 PS) | |
Torque | 343 Nm @ 0–6,000 rpm | |
Fuel system | 800V SiC inverter with liquid-cooled stator | |
Emissions standard | Zero tailpipe emissions (ZEV); EU CO₂ fleet compliance | |
Compression ratio | N/A | |
Cooling system | Dedicated liquid cooling circuit (motor + inverter) | |
Turbocharger | N/A | |
Timing system | N/A | |
Oil type | Gear oil: Smart EV-GL4 75W-90 (reduction gearbox only) | |
Dry weight | 98 kg (motor + inverter assembly) |
The Smart SGE 300 – Electric was used across Smart's SEA (Sustainable Experience Architecture) platform with rear-wheel-drive mounting and co-developed by Geely. This motor powers the performance variants of the #1 and #3 with identical powertrain integration—and from Q3 2023 the updated inverter variant—creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The SGE 300 – Electric's primary reliability risk is inverter capacitor degradation under high-frequency DC fast charging, with elevated incidence in fleet/taxi use. Smart internal field data from 2024 indicated early inverter replacements in 8% of pre-Q3 2023 units before 80,000 km, while UK DVSA EV reliability surveys noted thermal management as a key concern in 2023–2024 BEV models. Frequent ultra-fast charging without preconditioning increases thermal stress, making charging protocol adherence critical.
Analysis derived from Smart technical bulletins (2022–2025) and UK DVSA failure statistics (2023–2025). Repair procedures should follow manufacturer guidelines.
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The SGE 300 offers strong performance and efficiency, but early units (2022–mid-2023) had inverter capacitor concerns under heavy fast-charging use. Post-Q3 2023 revisions improved thermal resilience. With proper charging habits and fluid maintenance, long-term reliability is expected to be robust.
Key issues include inverter capacitor degradation, gearbox whine from improper lubrication, coolant leaks at the motor-inverter interface, and resolver signal faults. All are documented in Smart service bulletins EL‑2023‑09 and EL‑2024‑02.
It powers the rear-wheel-drive and Brabus variants of the Smart #1 (2022–2025) and Smart #3 (2023–2025). Both models share identical motor hardware and software calibration for the 200 kW output version.
No. The motor and inverter are sealed units with locked calibration. Smart does not authorize power upgrades, and aftermarket tuning voids the high-voltage warranty. Performance is fixed at 200 kW (272 PS) by OEM design.
In the Smart #1 Brabus, typical consumption is ~17.5 kWh/100km (city) and ~14.2 kWh/100km (highway), or about 4.2–5.1 mi/kWh. Real-world mixed driving yields 15–16 kWh/100km depending on climate and regen settings.
Not applicable—it is an electric motor with no pistons, valves, or timing components. Mechanical failure modes differ entirely from internal combustion engines.
Only the reduction gearbox requires fluid: Smart EV-GL4 75W-90, changed every 160,000 km or 8 years. The motor and inverter use a separate ethylene-glycol coolant circuit with no user-serviceable intervals.
Comprehensive technical documentation and regulatory references
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