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 crossover SUVs, the SGE 300 – Electric was engineered for agile urban mobility with highway-capable refinement. Regenerative braking with multi-level adjustability enhances efficiency, while the motor’s compact axial-flux design reduces unsprung mass. Emissions compliance is inherent to its zero-tailpipe-emission architecture, meeting EU Regulation (EU) 2019/631 CO₂ fleet targets and UK VCA Whole Vehicle Type Approval standards.
One documented concern is inverter capacitor degradation under repeated high-load DC fast charging cycles, highlighted in Smart Service Information Bulletin EL‑2023‑09. This is linked to thermal stress on DC-link capacitors in early-build power electronics modules. From Q3 2023, Smart introduced a revised inverter assembly with enhanced thermal management and upgraded capacitor materials.
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 SGE 300 delivers instant torque ideal for city driving and responsive highway merging, but repeated 150 kW+ DC fast charging may accelerate inverter capacitor wear in pre-Q3 2023 units. Use of Smart-approved 800V charging networks with thermal preconditioning is recommended. The reduction gearbox requires Smart EV-GL4 75W-90 fluid changed every 160,000 km or 8 years. Early-build inverters (VINs before WMEZZZ1B8PF005000) should be inspected per SIB EL‑2023‑09 for capacitor bulging. Regenerative braking settings should be optimized to reduce mechanical brake wear in urban use.
Oil Specs: Gearbox requires Smart EV-GL4 75W-90 (Smart SIB EL‑2023‑09). Not interchangeable with conventional GL-5 oils.
Emissions: Zero tailpipe emissions certified under UK VCA Whole Vehicle Type Approval #VCA/WVT/2022/8876. No Euro classification applies to BEVs.
Power Ratings: Measured under UN ECE R85 and ISO 18487 standards. Peak output sustained for 30 seconds under thermal limits (Smart TIS EV-MTR-300-22).
Smart Technical Information System (TIS): Docs EV-MTR-300-22, SIB EL‑2023‑09
VCA Type Approval Database (VCA/WVT/2022/8876)
EU Regulation (EU) 2019/631 on CO₂ emission performance
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.
Locate the motor ID plate on the rear housing near the high-voltage connector (Smart TIS EV-MTR-300-22). The 8th VIN digit is 'Z' for SGE 300-equipped vehicles. Pre-Q3 2023 units use inverter part number 300EV-INV-A1; post-Q3 2023 use 300EV-INV-A2 with reinforced DC-link capacitors. Critical differentiation: Brabus models share the same motor but feature unique calibration and cooling ducts. Service parts for inverters require VIN and production date verification—early units require capacitor upgrade per Smart SIB EL‑2023‑09.
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.
Find answers to most commonly asked questions about SMART SGE-300.
Comprehensive technical documentation and regulatory references
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