solar panel, definition of

Physics. the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.

Often encountered by people the most when heating a home, as the heat rises to the ceiling. The opposite effect, cooling, can be observed near windows on a cold night, the windows cool the air and it drops. Therefore convection often causes drastic heat loss close to windows. If not dealt with (by the usage of curtains or double glazing usually) this can contribute greatly to heating and cooling costs, as in Summer you will get the opposite effect of heat easily entering the property from the outside via the glass & convection.

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Related Tags: solar, energy

Solar Panel Efficiency is a percentage measure of how Solar Energy from the Sun hitting a solar panel is ideally converted into useful electrical power. This is often given assuming perfect conditions; i.e. no shade, maximum sun and cool. In practice the actual rate of conversion can be somewhat different due to:

• Shading - even partial shading can have a dramatic effect on the energy produced.
• Heat - the hotter a solar panel becomes the less efficient it is at converting solar energy into electrical energy.
• Sun Strength - akin to shading, but if the Sun is behind clouds or low in the sky you will get dramatically less power.
  

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Related Tags: solar power, solar energy, energy efficiency, renewable energy, solar cells, green energy, solar panels