Plating, Anodizing & Surface Treatment worked example

Rectifier Energy Cost at 63% rectifier dc conversion efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop rectifier dc conversion efficiency to 63%, then walk the calculation through step by step. Estimate rectifier energy cost from kWh drawn, electricity rate, rectifier efficiency, and flat cooling or standby-load adders.

The inputs for this scenario

  • Rectifier energy drawn per run: 320 kWh (held at the documented default)
  • Utility electricity rate: 0.14 $/kWh (held at the documented default)
  • Rectifier DC conversion efficiency: 63 % (the input this scenario stresses; the baseline uses 88)
  • Cooling and standby load adder: 22 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Energy cost = kWh x electricity rate x rectifier efficiency% + cooling and standby adder.
  • Total rectifier energy cost works out to 49.22 $ at these inputs, and this is the headline figure for the scenario.
  • Rectifier energy cost per unit works out to 0.15 $ / piece at these inputs.
  • Variable rectifier energy cost works out to 27.22 $ at these inputs.
  • Fixed rectifier energy cost adder works out to 22 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where rectifier dc conversion efficiency sits at 88% and the headline result is 60.02 $, this scenario comes in 18% below the baseline at 49.22 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to rectifier dc conversion efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats efficiency as a single flat percentage; real rectifiers vary efficiency with load, so a unit that idles at low duty will cost more than this flat model predicts.

Results at a glance

  • Total rectifier energy cost: 49.22 $ (headline result)
  • Rectifier energy cost per unit: 0.15 $ / piece
  • Variable rectifier energy cost: 27.22 $
  • Fixed rectifier energy cost adder: 22 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Rectifier Energy Cost calculator, set rectifier dc conversion efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.