Captive Power Economic Model

Understanding the True Cost of Self-Generation

Levelized Cost of Electricity (LCOE) - ABCDE Model

The true cost of captive power generation extends far beyond fuel expenses. Our comprehensive ABCDE model captures all components:

Total Cost =
A + B + C + D + E
A

Capital Cost

Fixed Cost (Regardless of Operation)

Includes:

  • Power plant equipment
  • Civil works & foundation
  • Mechanical installation
  • Electrical installation & controls

Equipment Examples:

Diesel Generator Boiler Steam Turbine Gas Turbine Balance of Plant

Typical CAPEX: Rp 10-20 billion per MW depending on technology

B

Fixed O&M

Fixed Operating & Maintenance Costs

Includes:

  • Staff salaries
  • Operation team
  • Maintenance contracts
  • Administration & overhead
  • Insurance
  • Property taxes

Typical Fixed O&M: 2-4% of CAPEX per year

C

Fuel Cost

Major Cost Component (40-70% of LCOE)

Fuel Types by Technology:

Technology Fuel Type Typical Cost
PLTD Diesel Oil Rp 12,000-16,000/liter
PLTG Natural Gas $6-12/MMBTU
PLTU Coal $80-150/ton

Fuel cost volatility is the biggest economic risk - subject to global commodity prices and exchange rate fluctuations

D

Variable O&M

Depends on Operation Hours

Includes:

  • Spare parts consumption
  • Lubricants & consumables
  • Maintenance materials
  • Water treatment chemicals
  • Overhaul costs

Typical Variable O&M: Rp 50-200/kWh depending on technology and age

E

Grid Interconnection

Infrastructure Connection Costs

Includes:

  • Transmission line construction
  • Switchyard installation
  • Substation connection
  • Protection & metering
  • Backup/redundancy systems

Cost varies by distance and voltage level. Often shared with PLN infrastructure investment.

Captive Power vs PLN Tariff

Economic comparison across different generation technologies

PLN Industrial Tariff Reference

Golongan I-3 (TM)
Medium Voltage
Rp 1,114.74
per kWh
Golongan I-4 (TT)
High Voltage
Rp 996.74
per kWh
Most Competitive

Typical Captive Power LCOE by Technology

Plant Type Technology Typical LCOE Range vs PLN I-4
PLTD Diesel Generator Rp 2,500 - 4,000 / kWh 150-300% higher
PLTG Gas Turbine Rp 1,200 - 2,000 / kWh 20-100% higher
PLTU Coal Steam Rp 900 - 1,400 / kWh (-10%) - 40% higher

Economic Conclusion

For most industrial applications, PLN supply is significantly more cost-effective than captive generation:

  • Lower LCOE - especially compared to diesel and gas captive plants
  • Price stability - avoid fuel price volatility and currency risk
  • No capital investment - eliminate power plant CAPEX burden
  • Reduced operational complexity - focus on core business, not power generation

The remaining concern is power quality and reliability - which Pilar Bahtera Energi addresses with comprehensive solutions.

Hidden Costs of Captive Power

Often overlooked factors that increase total cost of ownership

Opportunity Cost

Capital tied up in power infrastructure could be invested in core business expansion, technology upgrades, or productivity improvements.

Management Overhead

Senior management time spent on power plant issues, fuel procurement, and regulatory compliance diverts focus from strategic business priorities.

Efficiency Degradation

Plant efficiency declines over time, increasing fuel consumption per kWh. Older captive plants often operate at 15-25% below nameplate efficiency.

Environmental Compliance

Increasing costs for emissions monitoring, treatment systems, and carbon pricing. Future regulatory tightening creates financial uncertainty.

Unplanned Outages

Production losses from power plant failures. A single major outage can cost billions in lost production and restart expenses.

Currency Risk

Fuel and spare parts often imported, creating exposure to IDR/USD exchange rate fluctuations. Can add 20-40% cost volatility.

Calculate Your True Power Cost

Use our comprehensive calculator to compare captive power economics vs PLN supply with power quality solutions

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