Back to Knowledge Center
Efficiency 2026-04-15 8 min readBy Ziyao Engineering Team

Transformer TCO Calculator Guide

25-year total cost of ownership calculation for transformers: purchase price + energy losses + maintenance.

Transformer TCO Calculation

Total Cost of Ownership (TCO) considers purchase price plus lifetime energy losses and maintenance costs.

TCO Formula

  • TCO: C₀ + (P₀ × T × E) + (Pₖ × LF² × T × E) + M
  • C₀: Purchase price
  • P₀: No-load loss (kW)
  • Pₖ: Load loss (kW)
  • T: Operating hours (8760/year × 25 years)
  • E: Electricity rate ($/kWh)
  • LF: Load factor
  • M: 25-year maintenance cost

Need Technical Support?

Our engineering team can help with product selection, specifications, and project requirements.