Energy Saving Electronics

Saving energy for a better tomorrow

Renewable Energy

Electrical Energy from Renewable Sources

Renewable energy uses natural resources such as sunlight, wind and tides. The key point is that the resources are automatically and naturally replenished, unlike oil, gas or coal.

The renewable energy technologies used for electricity generation are primarily solar power, wind power, and hydro-electricity.

This site does not aim to provide detailed information on this subject, but it is widely covered on other sites that can be found from the Links Page.

Micro-generation of electricity "at home"

The rapid increase in electricity costs combined with people's wishes to reduce their carbon footprint has resulted into rising interest in micro-generation.

There are two main methods of generating electricity at home, solar cells and wind turbines.

Solar PV (photovoltaic) uses the sun's energy to create electricity. An electric field is created when light falls on the layers of the cells, causing electricity to flow. The stronger the light, the more electricity is produced.

Photovoltaic solar cells are still expensive and are difficult to justify on economic grounds alone.  (Note that the more common type of solar panel does not generate electricity but directly heats water from sunlight).

Small wind turbines, with peak outputs of between 1kW and 2kW, are becoming increasingly popular. 

The positioning of these turbines is critical as the power output is related to the wind speed by roughly a cube law.  That means that if 1kW is being generated with a 12mph wind speed, the power will fall to below 150 watts when the wind speed falls to 6mph.

To be viable, the turbine must be sited such that wind speed is maximised.

Sell your own energy

If you have your own renewable energy source, wind or solar, or are thinking of installing it, there is a UK based scheme whereby you may be able to be paid for the energy that you produce.

Read more at the Energy Saving Trust.

Offshore Wind Farm

Offshore Wind Farm

Picture from dorsetforyou.com