TCO Analyzer
Interactive calculator
TCO analysis for electrical equipment comparing capital costs, energy losses, maintenance, and lifecycle economics.
Compute total ownership cost.
๐ฅ Input Parameters
๐ค Results
๐ Calculation Steps
Capital cost
Purchase, installation, commissioning.
Energy losses
No-load + load losses, cost of energy.
Maintenance
Annual inspection, testing, preventive maintenance.
Present value
Discount future costs to present.
๐งฎ Formula
TCO Model
TCO = C_cap + sum((C_loss+C_maint)/(1+r)^t) + F*C_failure
Lifecycle cost including capital, operating losses, and failure risk.
| Symbol | Variable | Unit | Description |
|---|---|---|---|
| C_cap | Capital cost | $ | |
| C_loss | Energy loss cost | $/yr | |
| C_maint | Maintenance cost | $/yr | |
| r | Discount rate | % | |
| n | Lifetime | years | |
| F | Failure probability | % |
๐ Worked Example: Transformer TCO Comparison
๐ Result Interpretation
๐ฅ Guidance
DP < 200 or fault gas generation.
๐ก Engineering Recommendations
Loading > 50% for >4000h/yr
Always specify DOE 2016 compliant (or higher) efficiency.
Amorphous core transformers reduce no-load losses by 70% vs standard grain-oriented.
โก Quick Facts
๐ฌ Engineering Insight
"The highest-leverage TCO decision in most electrical installations is transformer efficiency. A 500kVA transformer operating 5000h/yr at $0.12/kWh will consume more in energy losses in 2 years than its purchase price. Premium efficiency transformers (DOE 2016 compliant) are almost always cost-justified."
๐ Standards & References
Commercial/industrial transformer efficiency standards.
โ Frequently Asked Questions
Usually, but not if load factor <30% or annual operating hours <2000. In those cases, standard transformer may be optimal.
๐ง Related Calculators
๐ Related Knowledge
๐ Related Case Studies
Industrial Plant Power Design: 250 MW Steel M...
A 250 MW integrated steel mill in Gary, Indiana, required a complete substation upgrade to support new electric arc furnace (EAF) loads and expanded rolling mill operations. The project involved replacing aging 138 kV GIS switchgear and upgrading the 138/13.8 kV main step-down transformer, necessitating full re-engineering of medium-voltage (13.8 kV) feeder cables from the substation to six critical process buildings.
Data Center Electrical Design: 40 MW Hypersca...
A 40 MW hyperscale data center located in Jurong East, Singapore, designed to support high-density AI and cloud workloads. The facility comprises eight server halls, each fed by dual 20 kV utility feeds, with redundant 10 kV medium-voltage switchgear and 400 V low-voltage distribution. Ambient temperature averages 31ยฐC year-round, with high humidity (75โ85% RH), impacting thermal derating.
Hospital Power Systems: Seismic-Rated Emergen...
Retrofit and expansion of emergency power distribution infrastructure at Los Angeles County + USC Medical Centerโa 600-bed Level I trauma center located in Seismic Zone IV. Project involved upgrading 4.16 kV and 480 V emergency switchgear, generator interconnections, and critical branch circuits serving ICU, ORs, ER, and life safety systems across three interconnected buildings.
Solar Farm Design: 320 MWac Utility-Scale PV...
320 MWac utility-scale photovoltaic solar farm located in the Texas Panhandle (near Amarillo), featuring bifacial monocrystalline modules mounted on single-axis trackers. Site experiences high ambient temperatures (up to 45ยฐC), low humidity, and moderate wind exposure. Interconnection is via a 345 kV substation with 12 collector circuits feeding into 8 ร 40 MVA pad-mounted transformers.