Energy costs and savings
Summary
This document briefly describes the energy requirements, costs, environmental impact and usage assumptions that can be applied when evaluating the benefits of PowerMAN:
A typical personal computer
- Requires 150Wh (0.15kWh) of direct energy
- Costs between £80-150 per annum in direct energy
- Wastes up to £60 per annum in direct energy
- Produces up to 565 kg of CO2 per annum
- Equivalent to driving approximately 2100 miles
Research based upon user questionnaires found
- Potential savings of between £10.25 and £22.44 per computer per annum
- Equivalent to between 4p* and 6p per computer per day
Experience from two live sites actually found
- Estimated savings of £72 and £74 respectively
- Equivalent to approximately 20p per computer per day
*Based upon two different models using a five day week and a seven day week respectively
Full Document
PowerMAN TechNote - Energy costs and savings