The SAGMOTO i5 is the light-duty electric truck in the SAGMOTO range, purpose-built for urban last-mile delivery, parcel logistics, FMCG distribution, and light municipal service. With a 100 kWh LFP battery pack operating at 400 V nominal, a single permanent magnet motor producing 160 kW peak power and 1,050 Nm peak torque, and a CCS2 DC fast charging port supporting up to 120 kW peak, the i5 is one of the most practical electric truck platforms for city logistics operation. This maintenance guide covers the full 8-year battery warranty period, addressing the high-voltage lockout procedure, the LFP battery care regime, the motor and inverter service intervals, the brake regen calibration, the DC fast charging port maintenance, the vehicle-to-load (V2L) functionality, and the spare parts inventory recommendations for fleets operating 5 to 100 i5 units.
i5 Powertrain Architecture
The i5 powertrain is engineered around three primary systems: the high-voltage traction system at 400 V nominal, the DC fast charging system, and the 12 V auxiliary system. The traction system uses the same modular LFP cell-to-pack architecture as the larger i9, but scaled down to a 100 kWh pack operating at the lower 400 V voltage class that is standard for European, Chinese, and most emerging market EVs.
The 400 V architecture is a meaningful design choice for the i5. It allows the truck to use CCS2 charging (the global standard for mid-power EVs) at up to 120 kW, which translates to approximately 15 percent to 80 percent state-of-charge in 45-55 minutes at a typical 100 kW depot charger. The 400 V architecture also allows the truck to use the smaller and lighter inverter and motor components that are widely manufactured for the global passenger EV market, which reduces parts cost and improves parts availability.
The motor produces 160 kW peak power and 1,050 Nm peak torque, which is sufficient for 7.5-12 tonne GVW urban delivery operation. The single-ratio reduction gearbox eliminates transmission maintenance entirely. Brake regen is configurable up to 160 kW of regenerative braking, with separate calibration profiles for urban stop-and-go, suburban, and highway duty cycles. The motor controller (inverter) uses silicon carbide (SiC) MOSFET technology for higher efficiency at partial loads, which is critical for urban delivery operation where the truck spends most time at low torque and low speed.
High-Voltage Safety: The First Maintenance Priority
Every i5 service intervention beyond the 12 V auxiliary system begins with a high-voltage lockout/tagout procedure. This is non-negotiable and must be enforced rigorously to prevent personnel injury from the 400 V traction system.
The lockout procedure requires four steps: (1) power down the vehicle through the dashboard disconnect and verify the dashboard displays the "Ready to Disconnect" status message, (2) wait 5 minutes for the inverter capacitors to bleed down (the inverter holds residual charge for up to 2 minutes after shutdown), (3) open the manual service disconnect located behind the front grille service panel (orange-cabled twist-lock disconnect), and (4) install the lockout tag with technician ID, date, and expected service duration. Verification with a CAT III 1,000 V multimeter between the high-voltage bus and chassis ground is mandatory before any service work begins.
Maintenance Schedule by Service Interval
The i5 maintenance schedule is organised into six service intervals, summarised in the table below.
| Interval | Service Items | Typical Duration | Technician Level |
|---|---|---|---|
| Daily (pre-trip) | Tire pressure, 12V battery check, brake pedal feel, regen setting verify, high-voltage connector visual | 10 minutes | Driver |
| Monthly | Tire rotation, brake pad visual, cabin filter check, charging port cleaning, regen calibration verify | 1 hour | HV-1 trained mechanic |
| Quarterly (15,000 km) | Wheel alignment, brake fluid replacement (DOT4 LV), 12V auxiliary battery test, suspension visual, charging port deep clean | 2.5 hours | HV-1 trained mechanic |
| Semi-annually (30,000 km) | Coolant pH and concentration test, motor inverter diagnostic scan, motor insulation resistance test, HVAC refrigerant level check, chassis lubrication | 4 hours | HV-2 certified technician |
| Annually (60,000 km) | All semi-annual items + gearbox oil replacement (SAE 75W-90 GL-5), motor bearing vibration analysis, brake caliper rebuild, body controller firmware update | 8 hours | HV-2 certified technician |
| 2-year (120,000 km) | All annual items + HV connector torque verification, HV cable insulation test, battery thermal pump replacement, charging port assembly inspection | 12 hours | HV-3 certified technician |
The 8-year major battery inspection is a warranty-covered service that triggers the battery health baseline for warranty extension eligibility. It includes cell-by-cell voltage measurement, thermal management system performance verification, full high-voltage insulation test, and BMS firmware update. SAGMOTO dealers provide this service at no cost within the 8-year warranty window provided the operator has adhered to the quarterly and semi-annual intervals.
LFP Battery Care: The Most Critical Maintenance Domain
The 100 kWh LFP battery is the single highest-cost component on the i5 (replacement value approximately USD 24,000 if out of warranty). Four operational practices dominate LFP battery health.
First, state-of-charge (SOC) management: keeping daily operating SOC between 20 percent and 85 percent delivers 4,000+ full equivalent cycles versus 2,500 cycles for operators who routinely charge to 100 percent or discharge below 10 percent. The i5 BMS allows operators to set the upper charging limit, and urban delivery fleets running consistent routes should configure the upper limit to 85 percent unless the route requires maximum range.
Second, charging current and C-rate management: the i5 supports up to 1.2C peak DC charging (120 A into the 100 kWh pack), but limiting daily DC fast charging to 1C (100 A) and reserving 1.2C peak for emergency situations extends cell life measurably. The BMS logs charge cycle profile, and SAGMOTO recommends depot-installed 60 kW DC chargers (1C rate) as the routine charging solution for urban delivery fleets.
Third, thermal management: the LFP pack operates optimally at 25°C cell temperature. The thermal management system maintains this across ambient temperatures from -20°C to +50°C. Operators in hot climates (+40°C+ ambient) should avoid extended idle periods with cooling off. Operators in cold climates (-10°C or below) should preheat the battery using the depot charger or the onboard heater before initiating high-rate DC charging, because charging cold LFP cells accelerates lithium plating degradation.
Fourth, storage SOC for long-duration idle: for fleets with seasonal operation (e.g., agricultural produce logistics with 4-month winter downtime), the i5 should be stored at 50 percent SOC to minimise calendar aging. The BMS implements a storage mode that draws auxiliary systems from the 12 V battery and leaves the high-voltage pack in a dormant state with periodic top-up balancing cycles.
Brake System and Brake Regen Calibration
The brake regen system on the i5 captures up to 70 percent of routine braking events in urban duty (versus 80 percent on the heavier i9 because the i5's smaller mass and lower kinetic energy extend the deceleration range where regen is fully effective). Brake pad life extends to 150,000-200,000 km in mixed urban-suburban duty, significantly better than the 60,000-80,000 km pad life of a comparable diesel light truck.
The regen calibration should be verified at every quarterly service interval. The procedure involves driving the truck on a controlled test route, applying the brake pedal at 30 percent, 50 percent, and 70 percent positions from 50 km/h down to 10 km/h, and verifying deceleration profile against the calibrated target within ±5 percent. Recalibration is required only if the pedal position sensor or brake pressure sensor drifts, which typically occurs at the 4-year or 6-year service interval depending on duty cycle.
Friction brake service is dramatically reduced compared to diesel. Brake pads typically last 150,000-200,000 km in urban duty. Brake discs are warranted for 350,000 km. The brake calipers require rebuild only at the 2-year service interval. The electronic parking brake (EPB) actuator should be exercised monthly to prevent seizure, particularly in coastal climates with high humidity or salt exposure.
DC Fast Charging Port Maintenance
The CCS2 DC fast charging port is one of the i5's most exposed mechanical interfaces and requires regular attention. The port uses a CCS2 (Combo 2) connector compatible with both AC Type 2 (for depot slow charging at 22 kW) and DC CCS2 (for fast charging up to 120 kW). Urban delivery fleets typically use a mix of depot slow charging for base loads and DC fast charging for shift-change turnaround.
The charging port should be inspected monthly for contamination, oxidation, or pin damage. Clean with isopropyl alcohol and a lint-free wipe. The port cover should be inspected for proper sealing. The locking actuator (for CCS2 DC charging) should be tested monthly to verify it engages and disengages correctly. The CCS2 communication module should be diagnosed annually via the BMS diagnostic scan tool to verify proper handshake with the charging station.
Common port failures include: (1) pin oxidation from humid climate storage without port cover use (clean with contact cleaner and re-inspect), (2) loose DC pin contact from frequent fast-charging cycles (replace the CCS2 connector assembly, USD 280-380), and (3) CP/PP communication faults from cable damage (replace the CCS2 cable harness, USD 180-260). SAGMOTO recommends replacing the CCS2 connector assembly every 60,000 charging cycles as preventive maintenance for high-utilisation fleets.
Vehicle-to-Load (V2L) Functionality
The SAGMOTO i5 is one of the first electric commercial vehicles to integrate vehicle-to-load (V2L) functionality. The V2L system uses the high-voltage battery to provide 230 V AC power at up to 10 kW continuous through two industrial-grade outlets mounted in the side step. The V2L function enables the i5 to power emergency response equipment at scene, refrigeration at remote parking locations, or workshop tools in field maintenance operations.
The V2L outlets require quarterly visual inspection and annual electrical safety testing. The V2L inverter (which converts 400 V DC traction battery power to 230 V AC) is liquid-cooled and shares the thermal management loop with the traction battery cooling. The V2L inverter should be diagnosed semi-annually via the BMS diagnostic tool to verify power quality and frequency stability. The outlets themselves (industrial IEC 60309 16 A or 32 A connectors) require annual replacement at high-utilisation rates (typically 3-5 years in rental/utility duty, 8-10 years in standard fleet duty).
Common Faults and Troubleshooting
| Symptom | Likely Cause | Diagnostic Procedure | Resolution |
|---|---|---|---|
| Reduced range (over 15% degradation) | Cell imbalance, cooling system fault, or BMS calibration drift | BMS diagnostic scan, cell voltage check, coolant temperature profile | BMS recalibration or thermal management service |
| DC fast charge initiation failure | CCS2 port contamination, CP/PP communication error, or HV cable damage | Port visual + clean, CCS handshake test, cable megohmmeter test | Port cleaning, cable replacement if insulation breach |
| Warning light: HV System Isolation Fault | High-voltage cable damage, water ingress, or component insulation failure | Insulation resistance test per circuit segment | Repair specific cable segment or replace affected component |
| Brake pedal feel change or warning | Brake fluid contamination, regen calibration drift, or pedal sensor failure | Brake fluid test, pedal position sensor output check, regen test | Brake fluid replacement, sensor replacement, or regen recalibration |
| HVAC cooling performance degradation | Refrigerant leak, compressor clutch wear, or cabin filter blockage | Refrigerant level check, compressor current draw, cabin filter inspection | Leak repair and recharge, compressor replacement, or filter replacement |
| V2L outlet no power output | V2L inverter fault, outlet wiring damage, or thermal management fault | V2L diagnostic scan, wiring continuity test, thermal system check | V2L inverter replacement, wiring repair, or thermal management service |
| 12V auxiliary battery failure | Auxiliary battery age, BMS parasitic drain, or charging system fault | Battery health test, parasitic current measurement, DC-DC converter check | Battery replacement, parasitic drain repair, or DC-DC service |
Spare Parts Inventory Recommendations
For fleet operators running 5-10 i5 units, SAGMOTO recommends the following minimum inventory to support 95 percent of common fault repairs within 24 hours.
Brake and chassis parts: 4 sets of front brake pads, 4 sets of rear brake pads, 5 L of brake fluid (DOT4 LV), 20 chassis grease points worth of EP2 grease, 2 cabin air filters (HEPA + carbon), and 2 sets of wiper blades.
Electrical parts: 2 spare CCS2 charging connector assemblies, 2 spare 12V auxiliary batteries, 2 DC-DC converters (for 12V charging system), 4 high-voltage coolant pumps, and 1 set of HV-rated personal protective equipment (Class 0 gloves, FR coveralls, arc-flash face shield).
Thermal management: 20 L of OAT coolant concentrate, 2 HVAC refrigerant top-up bottles (R-1234yf, 1.4 kg each), 4 HVAC compressor clutch coils, and 2 cabin heater cores.
Motor and gearbox (for HV-3 certified technicians): 1 spare drive motor (kept at regional hub), 2 gearbox seals, and 4 gearbox oil change kits including magnetic drain plug and filter.
Technician Training and Certification
SAGMOTO offers the same three-tier technician certification programme for the i5 as for the i9, but with a slightly shorter training duration appropriate to the smaller powertrain. HV-1 certification is 32 hours (4 days) covering 12 V system maintenance, brake service, suspension, cabin filter, and high-voltage system awareness. HV-2 certification is 64 hours (8 days) covering semi-annual and annual service intervals including coolant service, inverter diagnostics, motor insulation testing, and DC fast charging system service. HV-3 certification is 96 hours (12 days) including the 2-year service interval work and motor and gearbox service. Refresher training every 24 months is required to maintain certification (6 hours for HV-1, 8 hours for HV-2, 12 hours for HV-3).
Frequently Asked Questions
What is the warranty on the i5 high-voltage battery?
The i5 high-voltage battery carries an 8-year or 250,000 km warranty, whichever comes first, against capacity loss below 70 percent of nominal. The warranty also covers manufacturing defects in the BMS, thermal management components, and high-voltage connectors. The warranty is conditional on adherence to the quarterly and semi-annual service intervals at a SAGMOTO-certified service point using SAGMOTO-approved parts.
Can the i5 charge at Tesla Supercharger stations?
Yes, with an adapter. The CCS2 charging port on the i5 is compatible with Tesla Supercharger stations in North America through the SAE J3400 NACS to CCS2 adapter. In European, Middle Eastern, and Asian markets, no adapter is required because the i5's CCS2 connector is the regional standard. SAGMOTO dealers in North America stock the CCS2-to-NACS adapter for fleet buyers.
What is the typical battery replacement cost at end of warranty?
If the battery requires replacement after the 8-year warranty period (typically only if cycle count or calendar aging exceeds design tolerance), the indicative replacement cost is USD 22,000-28,000 for the 100 kWh pack including labour and disposal credit for the used pack. This cost is offset by the avoided diesel fuel cost over 8 years (typically USD 75,000-95,000 in fuel savings versus a comparable diesel truck) and by the avoided brake and engine maintenance (typically USD 12,000-18,000 over 8 years).
Conclusion
The SAGMOTO i5 is engineered around the principle that electric commercial vehicles in urban delivery duty require fewer consumables but higher technician certification than diesel trucks. The LFP battery thermal management, the brake regen calibration, and the DC fast charging port maintenance dominate the i5 service workload. Fleet operators who invest in HV-2 and HV-3 certified technicians, maintain a structured spare parts inventory, and adhere to the quarterly and semi-annual service intervals will capture the full 8-year battery warranty benefit and the i5's USD 70,000-90,000 lifecycle cost advantage versus a comparable diesel light truck. Contact Shaanxi Fenghan Trading for the i5 maintenance manual package, the HV technician certification schedule, and the spare parts inventory list for your fleet size and duty cycle.