Answering the demand for uninterrupted power on the go, these truck auxiliary power units (APUs) provide dependable electrical support for cooling, heating, and charging needs. Best for fleet operators, long-haul drivers, and maintenance teams seeking steady in-cab power without idling. The selection below highlights five APUs and related components that fit Thermo King TriPac Evo systems, RigMaster configurations, and common truck electrical upgrades. A quick buyer’s table follows to summarize core specs for easy comparison.
| Product | Brand | Key Feature | Compatible Systems |
|---|---|---|---|
| Tenlioshun 452947 | Tenlioshun | Alternator 120A, 14.5V, for Thermo King Tripac APU Evo | Thermo King Tripac APU Evo |
| 45-2671 Alternator 120A | LDCRE | OE-replacement style, high-load performance | Thermo King Tripac APU Evo |
| EGINCOOLER 3 Rows Radiator | EGINCOOLER | Aluminum radiator, high heat rejection | RigMaster APU units |
| Sgaorcpas 45-2671 | Sgaorcpas | 120A, 14.5V alternator replacement | Thermo King Tripac APU |
| ELYJDZBY Compressor 102-1018 | ELYJDZBY | Compressor compatible with Thermo King Tripac APU | Thermo King Tripac APU |
Tenlioshun Alternator 120A For Thermo King Tripac APU Evo
Product Note: Part Name/Number includes 452947, 45-2669, 45-2671, 845-2596. This unit is designed as a direct replacement with compatibility for Thermo King Tripac APU Evo systems. Best for operators needing a robust 120A, 14.5V power source to support high-demand electrical loads while the engine is off or idling.
Who it’s best for: Fleets and drivers who require reliable alternator performance under sustained high-load conditions. Why selected: It aligns with Thermo King Tripac APU Evo specifications and aims to deliver dependable power when shore power isn’t available. Caution: Verify exact OE replacement compatibility for your model year before purchase.
45-2671 Alternator 120A Replaces OE Numbers
Product Note: Replaces OE numbers including 452671, 45-2596, 41-9925, 845-2596, and 845-2681. High-quality 120A alternator designed for Thermo King Tripac APU Evo systems with durable construction for sustained use.
Who it’s best for: Operators who require precise OE-fit and straightforward replacement with known compatibility. Why selected: Strong replacement option when original parts are scarce. Caution: Ensure alignment with your specific Tripac configuration to avoid fitment issues.
EGINCOOLER 3 Rows Radiator For RigMaster APU
Product Note: Designed for RigMaster P-110, P10-4, and P10-40 setups (2008 and newer). Core size 13-1/16″x16-7/16″; Outlet and Inlet diameters are 7/8″.
Who it’s best for: Operators running RigMaster APU units needing improved cooling efficiency. Why selected: Aluminum construction supports heat management for demanding environments. Caution: Check core dimensions against your radiator bay to ensure fitment.
Sgaorcpas 45-2671 Alternator 120A
Product Note: Part Name 45-2671 452671; Application: Compatible with Thermo King Tripac APU. High-load capable 120A alternator replacement.
Who it’s best for: Buyers needing a direct-fit alternator replacement with established Tripac APU compatibility. Why selected: Provides a straightforward upgrade path for higher electrical demand. Caution: Confirm exact mounting and belt alignment requirements for your engine model.
ELYJDZBY 102-1018 Compressor For Thermo King Tripac APU
Product Note: Fits Thermo King Tripac APU; Part numbers 102-1018, 102-1059, 15-2171. Compressor replacement option for Tripac APU systems.
Who it’s best for: Operators needing a compatible compressor component to support cooling cycles on Thermo King Tripac APU setups. Why selected: Aligns with common Tripac compressor configurations. Caution: Confirm kit compatibility with your specific APU model year and version.
Buying Guide
What should a buyer consider when choosing a truck APU part?
Compatibility with your existing APU system is paramount. Check model numbers, OE replacements, and the specific Tripac Evo or RigMaster configurations. Look for parts designed to handle high-load conditions when the engine is off or idling.
Power needs and load planning
Assess your typical electrical load: climate control, battery charging, electronics. A 120A, 14.5V alternator can support strong demand, but ensure wiring, fuses, and the battery bank are sized for consistent operation.
Durability and materials
Aluminum radiators and high-quality alternators are favored for long life in roadway conditions. Consider corrosion resistance, heat management, and ease of replacement when planning maintenance schedules.
Installation and fitment considerations
Direct-fit OE-style replacements simplify installation and reduce downtime. Verify mounting points, belt alignment, and any required brackets or adapters for your truck model year.
Warranty and supplier reliability
Choose components from reputable brands with documented compatibility notes and clear replacement policies. This reduces risk when replacing critical APU parts in fleets or single-truck setups.
Usage scenarios and choosing alternatives
If you operate primarily with shore power while parked, you may prioritize smaller, efficient components. For remote routes with frequent idling, prioritize high-load capable alternators and robust cooling components that support sustained operation.
FAQ
- What is a truck auxiliary power unit used for? An APU provides in-cab electrical power for climate control, electronics charging, and system support when the main engine is off or idle.
- Is a 120A alternator sufficient for most APUs? For high-demand loads, a 120A unit is common, but always verify with your APU’s total load requirements and wiring capacity.
- Can I replace Thermo King Tripac APU parts with aftermarket components? Aftermarket replacements can fit, but confirm exact OE numbers and compatibility to avoid fitment or performance issues.
- How do I know if a radiator will fit my RigMaster APU? Check the part number, core dimensions, and inlet/outlet diameters against your RigMaster model and available space.
- Do these parts require special installation tools? Some replacements may require standard automotive tools and belt tensioning; consult installation guides or a qualified technician for complex assemblies.
- Are these parts suitable for fleet use? Yes, the listed parts are intended for common Thermo King Tripac Evo and RigMaster configurations, helping standardize maintenance across fleets.