Printer energy consumption testing measures the power profiles, sleep mode power, standby power, and Typical Energy Consumption (TEC) of printers, copiers, and multifunction devices to verify compliance with ENERGY STAR, EU ErP, and national energy efficiency standards such as GB 25956. Accredited third-party laboratories provide accurate, standards-based measurement data that supports eco-label certification, regulatory market access, and energy-efficient product development for imaging equipment manufacturers.
Technical Overview
Printer energy consumption testing is a laboratory-based evaluation that quantifies how much electrical energy a printer, copier, or multifunction device (MFD) consumes across its complete operating cycle. Because office imaging equipment typically spends the vast majority of its service life in ready, sleep, and off states rather than actively printing, global regulators and eco-label programs have established strict limits on both active-mode energy use and low-power-mode power draw.
The principal frameworks governing this field include the ENERGY STAR program requirements for imaging equipment, the EU Ecodesign (ErP) regulations covering standby and networked standby power (Regulation (EC) No 801/2013 amending Regulation (EC) No 1275/2008), and national efficiency standards such as GB 25956, which defines minimum allowable values of energy efficiency and energy efficiency grades for printers and fax machines in China.
Testing generates the objective data required for eco-label certification, mandatory energy labeling, corporate green procurement, and engineering optimization. Core metrics include Typical Energy Consumption (TEC) expressed in kWh per week, Operational Mode Energy Efficiency (OMEE), sleep mode power, standby and off-mode power, networked standby power, and default power-management delay times.
Testing Samples
Laser Printers and Laser Multifunction Printers
Monochrome and color electrophotographic devices, including network-ready multifunction printers with print, copy, scan, and fax capabilities. These products are generally classified as TEC-based devices under the ENERGY STAR imaging equipment requirements and are evaluated against weekly energy limits derived from device speed.
Inkjet Printers and Inkjet Multifunction Printers
Consumer, home-office, and business inkjet devices, which are commonly evaluated under page-based criteria such as OMEE, combined with limits on sleep mode and off-mode power. Both single-function and all-in-one configurations can be tested.
Production Printers and High-Speed Copiers
High-volume production-class devices operating above defined speed thresholds. These require extended duty cycles, longer warm-up periods, and larger standardized job volumes during TEC evaluation.
Label, Receipt, and Specialty Printers
Thermal receipt printers for point-of-sale applications, label printers, card printers, and mobile printers, assessed for idle power, sleep behavior, and average operational power consumption.
Large-Format Printers and Plotters
Wide-format inkjet devices used in engineering, architecture, and graphics production, evaluated for ready-state power, sleep entry behavior, and daily energy profiles.
Testing Items
Depending on the target program and destination market, printer energy consumption testing typically covers the following parameters:
- Typical Energy Consumption (TEC): total energy consumed over a representative weekly usage profile, expressed in kWh/week.
- Operational Mode Energy Efficiency (OMEE): page-based efficiency metric relating energy per job to device speed, applied to OMEE-based products such as most inkjet printers.
- Sleep mode power: average power draw after the device enters its lowest automatic power state.
- Standby and off-mode power: power consumed when the device is switched off or placed in a non-operating state, measured per IEC 62301.
- Networked standby power: power consumption while the device maintains network availability, assessed under EU Regulation (EC) No 801/2013.
- Ready and idle state power: instantaneous power in the warmed-up, job-ready condition.
- Default delay times: factory-default timers for automatic transitions to sleep and auto-off states, which must satisfy program minimums.
- Warm-up time and energy: time and energy required to reach operational readiness from a cold or low-power start.
- Power consumption under rated voltage and frequency conditions, including specified voltage tolerance scenarios.
Testing Methods
Test Setup and Environmental Conditions
Testing is performed in a controlled laboratory environment with ambient temperature maintained within the tolerance specified by the applicable test method (typically 23°C ± 5°C) and controlled relative humidity. The device is supplied with stable power matching its nameplate rating, and a calibrated power analyzer with sufficient bandwidth, crest factor capability, and measurement accuracy is connected between the mains supply and the equipment under test. Consumables such as toner or ink cartridges and qualified paper are installed in accordance with the manufacturer's instructions before conditioning begins.
TEC Measurement Procedure
The device is first set to factory-default settings and conditioned through initialization and calibration runs. Energy consumption is then measured across standardized daily job patterns, with the number of jobs and pages determined by the product's rated speed class. The measurement integrates energy consumed in ready, printing, and final-state operation, plus the energy in sleep and off modes over the defined daily profile. The recorded data is used to compute the weekly TEC value, which is compared against the applicable limit derived from the device's functional adders and speed.
OMEE Measurement Procedure
For OMEE-based products, the laboratory measures the energy consumed while completing defined test jobs using standardized documents and page counts. The measured energy per job is combined with the device's measured throughput speed to derive the OMEE result, which is then evaluated against the eligibility criteria and limits of the relevant program version.
Sleep, Standby, and Off-Mode Measurement
Low-power measurements follow the methodology of IEC 62301, in which average power is determined over a stable measurement interval once the device has fully entered the target mode. For networked products, networked standby testing verifies power draw while the device remains remotely accessible, along with compliance of power-management behavior and information requirements under EU ErP rules. Default timer settings are documented and verified against program thresholds.
Data Recording and Reporting
The final test report presents the complete power and energy profile of the device, including mode-by-mode power levels, TEC or OMEE results, timer settings, instrument configuration, environmental conditions, and measurement uncertainty. Reports are structured to support submission to certification bodies, regulatory declarations, and internal benchmarking.
Applications
Printer energy consumption testing data serves multiple commercial and regulatory purposes across the product lifecycle:
- ENERGY STAR certification for imaging equipment, enabling use of the recognized energy label in North America and numerous partner markets.
- EU Ecodesign (ErP) compliance demonstrating conformity with standby and networked standby power limits for CE marking and market access in Europe.
- China Energy Label registration under GB 25956, including determination of energy efficiency grades for printers and fax machines.
- Green procurement qualification for government and enterprise tenders that require verified efficiency data or EPEAT-registered products.
- Research and development benchmarking, allowing engineers to compare power architectures, optimize sleep strategies, and validate design changes.
- Marketing substantiation, providing third-party verified figures for environmental claims and product datasheets.
FAQ
What is the difference between TEC and OMEE?
TEC (Typical Energy Consumption) is a weekly energy metric in kWh/week generally applied to higher-speed and electrophotographic products, while OMEE (Operational Mode Energy Efficiency) is a page-based efficiency metric relating energy per job to device speed, commonly applied to inkjet products under current ENERGY STAR imaging equipment requirements. The applicable metric depends on product type and program classification.
How many samples are required for testing?
In most cases, one representative production-unit printer is sufficient, accompanied by the specified consumables (toner or ink cartridges) and qualified media. Some certification programs additionally reserve the right to conduct verification testing on separately purchased market units.
How long does printer energy consumption testing take?
A typical evaluation requires one to three weeks, depending on device speed class, warm-up characteristics, duty cycle length, and the number of test conditions or voltage configurations required by the target standard.
Which standards apply to my target market?
For North America and many global markets, the ENERGY STAR imaging equipment requirements apply; for the European Union, the Ecodesign standby and networked standby regulations are mandatory; for China, GB 25956 governs the energy efficiency grading of printers and fax machines. Accredited third-party laboratories can confirm the precise scope for each destination.
Do factory-default timer settings affect the result?
Yes. Default delay times for entering sleep and auto-off modes are part of the compliance evaluation. If default timers are set longer than permitted thresholds, the device may fail certification even when its measured power levels are otherwise compliant, so timer configuration should be verified during design.