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1.1.2 Alternator

Premier Power Welder HO-C28 Alternator

Type: High-Output Welding Alternator

Model: Premier Power Welder HO-C28

Manufacturer: Premier Power Welder

Product Page: Cummins R2.8 270A Alternator

Rating: 270 amps

Application: Cummins R2.8 Turbo Diesel

Price: $899.95

Specifications

  • Output: 270A continuous
  • Voltage: 12V (standard automotive)
  • Application: Cummins R2.8 engines
  • Type: High-output welding alternator
  • SKU: HO-C28

System Configuration

Primary Function: Charges START battery and powers vehicle electrical systems

Output Capacity: 270A continuous (exceeds system maximum draw of ~326A with margin)

Mounting: Direct bolt-on replacement for Cummins R2.8

Wiring

Connection Destination Notes
Positive Output START battery+ (driver wheel well) See START Battery Distribution for wire specs
Ground Engine block Bonded via alternator mounting bolts

Ground Path: Alternator case → Engine block → Frame rail → START battery-

See START Battery Distribution for complete wire specifications (gauge, distance, voltage drop calculations).

Load Analysis

Alternator Capacity: 270A continuous

Worst Realistic Load: 218A (offroad scenario) = 52A margin (19% headroom)

The alternator supplies START battery loads plus BCDC charging. AUX battery loads (SwitchPros, ARB compressor, winch) do NOT draw from alternator.

See START Battery Load Analysis for complete scenario details.

Outstanding Items

  • Determine alternator positive output terminal size (for 1/0 AWG lug selection)
  • Verify alternator voltage regulator set point (14.2-14.4V for AGM batteries)