Solar Cells

• Solar cells - expensive but no environmental damage (apart from its manufacture)
• Solar cells generate electric currents directly from sunlight. Solar cells are often the best source of energy to chanrge batteries in calculators and watches which don't use much electricity
• Solar power is often used in remote places where there's not much choice (e.g. Australian Outback) and to power electric road signs and satellites
• In sunny countries solar power is a very reliable source of energy - but only in the daytime.
• Solar power can still be cost-effective even in cloudy countries like Britain
• Like wind, you can't increase the power output when there is extra demand
• Initial costs are high but after that, the energy is free and running costs almost nil
• Solar cells are usually used to generate electricity on relatively small scale