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Use measured watts and your tariff to compare always-on networking equipment without confusing adapter capacity with actual consumption.
For equipment that stays on all day, a small continuous power difference can accumulate over a year. Estimate consumption from measured input power where possible, then apply your own electricity tariff. Do not use the power adapter’s maximum output as though the router constantly consumes it.
Use the correct units
The calculation is watts multiplied by operating hours, divided by one thousand, to obtain kilowatt-hours. An illustrative device averaging 10 watts for 24 hours a day uses about 87.6 kilowatt-hours over 365 days. Multiply that energy by the applicable per-unit tariff to estimate the energy charge.
This example is arithmetic, not a measured result for a named router. Taxes, fixed charges and tiered pricing can affect the actual bill.
Measure a representative period
- Use a suitable, safely rated plug-in energy meter according to its instructions.
- Include normal idle and busy periods.
- Record attached USB devices or other powered accessories.
- Compare the same operating period and configuration between devices.
Read manufacturer figures carefully
Products such as Beryl AX and Spitz AX list power requirements and consumption information. Check whether a figure is a maximum, a qualified estimate or an input-adapter rating. Different figures cannot be compared fairly without understanding their conditions.
Consider the whole installation
Include the modem or optical terminal, switches, mesh nodes and any backup-power losses when evaluating a complete network. Replacing one router while adding several always-on boxes may not reduce total consumption.
Balance savings with availability
Before scheduling equipment off, account for overnight backups, security devices, remote access and automatic maintenance. Confirm that the intended schedule does not interrupt essential functions.
A useful comparison combines measured energy, purchase price and the network’s required availability. It does not assume a newer generation is automatically more economical, nor that turning off an important connection is worthwhile for every household.
Sources and editorial notes
Sources checked 8 October 2026. Independent guidance and original illustrations; product comparisons use published specifications rather than hands-on benchmarks. Check the exact model, revision and regional documentation before changing settings.