SAGMOTO i9 vs BYD T5: Electric Truck Comparison for European Fleet Operators

Two pure-electric heavy trucks now lead the European commercial vehicle tender market: the SAGMOTO i9 4x2 and the BYD ETH8 / T5 (the T5 platform supplied by BYD's commercial vehicle division). Both compete in the same 18-tonne GVW segment, both rely on LFP (lithium iron phosphate) battery chemistry for cycle life and thermal safety, and both target fleet customers who need to decarbonize urban distribution under EU zero-emission zone mandates. This comparison examines the two platforms in detail — battery sizing, e-axle configuration, charging standard, payload, ambient tolerance, and 5-year total cost of ownership — and identifies the right choice for each fleet use case.

Battery and Powertrain Architecture

Both vehicles are designed for urban distribution duty with a daily radius of 80-180 km and depot return overnight charging. They differ meaningfully in battery capacity, charging architecture, and e-axle design, and those differences define the practical operating envelope of each platform.

The i9 has the peak power advantage (410 kW vs 340 kW), which gives it noticeably stronger performance under transient load (hill start, motorway merge with full payload, headwind recovery on autobahn gradients). The i9 also supports 250 kW DC peak charging, which roughly halves the dwell time versus the BYD T5 120 kW peak — a relevant factor for fleets running two-shift operations on the same vehicle. The BYD T5 counters with a slightly larger usable battery capacity (255 kWh vs 246 kWh) and the in-house Blade pack which carries a published cycle life of 5,000 cycles to 80 percent SOH. SAGMOTO publishes the i9 LFP cycle life at 4,500 cycles to 80 percent SOH based on the CATL pack, with the EVE pack variant achieving 5,500 cycles in independent testing.

Cab, Body Options, and Configurability

The SAGMOTO i9 is offered with three cab widths (H4R narrow day cab, H6 medium day cab, H9C sleeper cab) and three wheelbase options from 4,200 mm to 5,800 mm. The cab bodywork is shared with the SAGMOTO H-series diesel platform, which simplifies windshield supply, front panel repair, and AC service points. Common custom bodies for i9 in Europe include refrigerated distribution (Evo Cold or Thermal King refrigerated unit on a 7.2 m body), dry box body (7.8 m with lift gate), and container chassis (20-ft swap-body). Standard GVW 18-tonne varies by country regulation: the German 18-tonne LKW class for inner-city ZEV duty, the Dutch 18-tonne urban distribution class, the Spanish 18-tonne class for mountain-region distribution.

The BYD T5 is offered with a single cab variant (the larger Sun-Visor-equipped day cab) and a single 4,200 mm wheelbase. The BYD cab is somewhat narrower than the SAGMOTO H6 on lateral shoulder width and offers less depth in the cab footwell, which has been the BYD T5's chief driver-acceptance complaint in northern European fleets during winter operations. Custom bodies for the T5 are sourced through BYD's European bodybuilder integration network (Lamberet, Thermo King, Carrier) and the lead times are competitive with the SAGMOTO network.

Charging Infrastructure Compatibility

Both vehicles use CCS2 Type 2 connectors and are compatible with the European Combined Charging System. The SAGMOTO i9 supports ISO 15118 Plug & Charge through the dealer-installed hardware update released in 2024, which simplifies public charging on the IONITY and Shell Recharge networks for fleets without an RFID card issued. The BYD T5 supports ISO 15118 Plug & Charge through BYD's Mobile App account. Public depot charging costs at 350 kW-capable sites in Germany in 2026 range between EUR 0.42 and EUR 0.58/kWh; depot charging at AC 22 kW ranges between EUR 0.18 and EUR 0.26/kWh.

For two-shift operators considering the i9 fast-charging advantage: a 250 kW depot charger (delta cost ~EUR 38,000 in 2026 vs EUR 31,000 for a 150 kW charger) pays back in roughly 14 months of two-shift operation versus a 150 kW depot charger if the duty cycle is constrained by charging rather than by driving hours. For single-shift operators, the 120 kW peak on the BYD T5 is already sufficient and the lower-cost charger is the better deployment choice.

Cold Weather and Hot Weather Performance

Northern European fleets face winter temperatures below -10°C for 4-6 weeks per year, and southern European fleets face summer depot temperatures above +38°C. The i9's published operating range includes a battery thermal management system with liquid cooling/heating, and the truck recovers normal range from a -25°C overnight cold start within 15-20 minutes of driving. The i9's heat pump HVAC system extends usable range in cold weather by 8-12 percent versus a resistive heater setup.

The BYD T5 uses a similar liquid thermal management approach with an integrated heat pump and is rated for -20°C to +45°C continuous operation. In head-to-head winter testing in northern Germany in early 2026 (reported by the independent trade press), the i9 delivered 215 km loaded at -8°C ambient versus 200 km for the BYD T5 under identical conditions, a 7.5 percent range advantage in cold weather for the i9. In summer testing in Andalusia at +42°C, both vehicles delivered range within 3 percent of the WLTP figure.

5-Year TCO Including Battery Degradation

The TCO comparison is more nuanced for EVs than for diesel vehicles because battery degradation materially affects residual value and the comparison should be run over a 5-year / 300,000 km holding period.

Over a 5-year holding period, the i9 saves approximately EUR 6,140 per truck versus the BYD T5, primarily through slightly lower acquisition cost, slightly better cold-weather energy efficiency, and slightly lower insurance. The margin is narrow because the bulk of the TCO is in acquisition and the residual value, both of which are converging as the two platforms mature. For a 30-truck urban distribution fleet, the i9 saves approximately EUR 184,000 over 5 years versus the BYD T5, which is a meaningful but not decisive margin.

Recommendation by Use Case

For municipal and regional refrigerated distribution fleets running two-shift operations, where fast charging turns the same asset twice per day, the i9's 250 kW charging and 410 kW peak power make it the better choice. For mixed-cargo depot operators running single-shift predictable routes, the BYD T5's narrower operating envelope and slightly better published cycle life make it the safer choice. For fleets requiring the broadest cab configurability (sleeper cab for overnight airport return, narrow cab for London ULEZ or Amsterdam historic center access), the i9's three-cab lineup is more flexible. For fleets with a single cab width requirement and a single wheelbase, the BYD T5's narrower product range simplifies standardization.

Conclusion

The SAGMOTO i9 and the BYD T5 are now both credible platforms for European urban fleet decarbonization. The i9 is the higher-performance and more configurable of the two, with a measurable advantage in cold-weather operation and fast charging that makes it the better fit for two-shift or heavy-route deployments. The BYD T5 is the simpler, narrower, and slightly more cycle-durable platform, which makes it the better fit for predictable single-shift routes and for fleets that want a tightly standardized platform. For most European fleet operators in 2026, the decision comes down to route profile and depot charging strategy rather than wholesale platform superiority. Contact Shaanxi Fenghan Trading for an i9 configuration matrix, EU homologation documentation, a CCS2 charging compatibility audit for your depot, and a side-by-side 5-year TCO projection for your specific duty cycle.