Energy Audit Loggers

Use this guide when you need to understand where electrical energy is being used, whether savings are realistic, and how load patterns change over time.

An energy audit is most useful when it is based on recorded proof rather than estimates. Electrocorder loggers help show when equipment runs, how hard circuits are loaded, where peak demand occurs, and whether changes have produced a measurable reduction.

When to use energy logging

  • You need to identify high-use equipment, circuits or operating periods.
  • You want to compare energy use before and after improvement work.
  • You need to understand load profile, peak demand or operating hours.
  • You are checking whether equipment is oversized, running unnecessarily or cycling unexpectedly.
  • You need proof for an energy-saving recommendation, business case or customer report.

What to measure

  • Voltage, current, power and energy over time.
  • kW, kVA, kVAR and power factor where full power analysis is needed.
  • Minimum, maximum and average current or power.
  • Load profile, peak demand and operating patterns.
  • Before-and-after measurements following improvement work.

Recommended loggers

Electrocorder EC-7VAR-RS Three Phase Voltage, Current & Power Factor Recorder

EC-7VAR-RS: Electrocorder EC-7VAR-RS Three Phase Voltage, Current & Power Factor Recorder

Use for three-phase energy audits where voltage, current, kW, kVA, kVAR, power factor and peak demand all matter.

Electrocorder EC-3A-RS Three Phase Current Recorder (400A/3kA)

EC-3A-RS: Electrocorder EC-3A-RS Three Phase Current Recorder (400A/3kA)

Use for high-current three-phase load profiles when current trends are enough to support the audit.

Electrocorder CT-3A-RS Three Phase Current Logger (60A/200A or 60A/400A)

CT-3A-RS: Electrocorder CT-3A-RS Three Phase Current Logger (60A/200A or 60A/400A)

Use for three-phase current logging where clamp-on CTs fit the conductors and power calculation is not required.

Electrocorder EC-2VA Power Logger and Energy Recorder

EC-2VA: Electrocorder EC-2VA Power Logger and Energy Recorder

Use for single-phase circuit or equipment energy logging where voltage and current are both needed.

Electrocorder CT-2VA Power and Energy Recorder

CT-2VA: Electrocorder CT-2VA Power and Energy Recorder

Use for single-phase power and energy logging where clamp-on CT measurement is the simplest installation route.

AL-2VA Power Logger UK

AL-2VA: Electrocorder AL-2VA Energy Logger for Domestic and Light Commercial Appliances

Use for plug-in appliance or light-commercial equipment checks where a socket-based logger is appropriate.

Quick comparison

Use this table as a quick route from the investigation type to the most likely logger.

Product Best for Measures Choose when
Three-phase audits where voltage, current, kW, kVA, kVAR, power factor and peak demand all matter. Voltage, current, power, energy and power factor. Use as the broadest energy-audit logger for industrial or commercial three-phase supplies.
Current trend and load-profile proof. Three-phase current only. Use when current profile is enough and full power or energy calculation is not required.
Single-phase circuit or equipment energy logging. Single-phase voltage, current, power and energy. Use when you need true power and energy on a single-phase load.
Single-phase power and energy logging with clamp-on current measurement. Single-phase voltage, current, power and energy. Use where clamp-on CT measurement is the simplest installation route.
Plug-in appliance or light-commercial equipment checks. Single-phase plug-in appliance energy and power. Use where the load can be measured from a standard socket outlet.

How to choose

  • Choose EC-7VAR-RS for broad three-phase energy audits and power-quality related energy questions.
  • Choose EC-3A-RS or CT-3A-RS when current trends and load profile are enough, and full power or energy calculation is not required.
  • Choose EC-2VA or CT-2VA for single-phase circuit-level power and energy logging.
  • Choose AL-2VA where a plug-in appliance or small-load study is the simplest route.

Typical audit workflow

  • Define the question: energy saving, load profile, peak demand, before-and-after proof, or equipment behaviour.
  • Select the logger based on supply type, current range and whether power values are required.
  • Record for long enough to capture normal operation, including shift patterns, weekends or process cycles where relevant.
  • Review the recorded data for peaks, idle running, cycling, imbalance and changes after improvement work.

Useful reading

Need help choosing?

If you are not sure which logger is best for an energy audit, contact us with the supply type, load type, current range and what you need to prove.