Refrigerated Trailers
Precedent S-750i
NewOur most innovative offering yet: powerful performance on and off the road.
The S-750i is Thermo King's most innovative trailer reefer unit, featuring a hybrid-electric architecture with integrated shore power for powerful performance on and off the road. It delivers cost savings, greater uptime, lower emissions, and is evergreen CARB compliant for 50-state operation.

Proven Innovation: An innovative, connected, and energy-efficient solution
The S-750i leverages many of the proven aspects of the Precedent platform and introduces new features with this new model:
First use of diesel-electric architecture with integrated shore power.
First use of 3-speed engine.
First use of next-generation control system.
Choose with Confidence: The enhanced operational efficiencies and sustainability performance benefits fleets transporting long haul or inner city. The S-750i represents the future of trailer refrigeration by running more efficiently on shore power, making it an ideal investment for ensuring long-term business success.
Benefits
Proven Emissions Compliant
Utilizing the proven S-Series engine, the S-750i meets current and proposed CARB ULETRU emissions without the use of a DPF. Integrated shore power, embedded telematics with 24 months of service, and R452A refrigerant position this unit well for future regulatory changes.
Why do you need shore power?
Benefits of Shore Power Operation include increased efficiency (4x more efficient than diesel), reduced environmental impact (fewer emissions), quieter operation (at least 3 decibels quieter), less maintenance, and longer TRU life due to extended engine maintenance time frames.
Use telematics to increase your profitability
Telematics data helps your fleet be more responsive by providing immediate issue detection, monitoring temperature, offering rapid alarm detection, security alerts for door openings, and detecting fuel loss. Every S-750i unit comes equipped with ConnectedSuite™ telematics, providing 24 months of complimentary service.
Keeping sustainability at the forefront
By purchasing an Evergreen CARB compliant unit, customers meet the strictest Particulate Matter and NOx regulations and maximize fuel usage. Since 2013, Precedent S-Series units have avoided over 6 million metric tons of CO2 emissions, contributing to Trane Technologies’ Gigaton Challenge to reduce customer greenhouse gas emissions by 1 billion metric tons.
Unit Specs
Refrigeration Capacity (BTU/hr) - Diesel HS Capacity
| 35°F/100°F | 68,000 |
| 0°F/100°F | 43,000 |
| -20°F/100°F | 26,500 |
Refrigeration Capacity (BTU/hr) - Electric Shore Power Capacity
| 35°F/100°F | 64,000 |
| 0°F/100°F | 40,000 |
| -20°F/100°F | 25,500 |
Heating Capacity (BTU/hr) at 35/0°F ambient
| Diesel | 36,000 |
| Electric | 25,000 |
Evaporator Airflow (CFM)
| High Speed | 3,300 |
| Low Speed | 2,000 |
| Shore power | 3,350 |
Engine
| Type | Four cylinder, direct injection, liquid cooled |
| Model | TK488CR1 |
| RPM at High Speed | 2,050 |
| RPM at Medium Speed | 1,810 |
| RPM at Low Speed | 1,250 |
| HP Rating at 2,050 RPM | 33 HP |
| Maintenance Interval | 3,000 hrs/4,000 hrs |
Thermo King Scroll Compressor
| Model | TKSR151 |
| Displacement | 9.4 in³ or 153 cc/rev |
Refrigerant
| Type | R452A (Zero Ozone Depletion Potential) |
| Charge | 16 lbs |
Weight
| Wet with battery System | 2,200 lbs |
Related Products
NewRefrigerated Trailers
Precedent C-600M
The Precedent C-600M is a cost-effective multi-temp reefer unit, optimized for food distribution, offering superior temperature control and double-digit fuel savings.
NewRefrigerated Trailers
Precedent S-610DE
The Precedent S-610DE is a multi-temp reefer unit designed for food distribution, allowing for two separate temperature zones in one trailer without adding remote evaporators. It is CARB Evergreen compliant, eliminating the need for a DPF.
NewRefrigerated Trailers
Precedent S-610M
The Precedent S-610M is a multi-temp reefer unit optimized for food distribution, featuring CARB Evergreen certification for no DPF requirement and superior temperature control.
Request a Quote
Tell us what you're looking for and a local Sonsray representative will reach out to you promptly with pricing and availability.
- No obligation — just honest answers from equipment experts.
- Fast response from your nearest Sonsray location.
- Factory pricing, financing options, and trade-in evaluation available.
- We carry new, used, and demo equipment across all brands.
Prefer to Talk?