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Always read all of the pages and subjects before starting a solar system installation - If you are unqualified or in any doubt about your own ability then consult a qualified solar system installer.

Picture of sun and solar panel as a solar logoYour Questions and our Answers

Solar - Free energy from natural resources

Q How does solar equipment work?

A Solar panels turn daylight and sunlight into electricity. The cells absorb the light and produce electric voltage, solar cells do not store any electricity so all power produced is fed through a regulator to the battery and stored there.

Q Do solar panels require maintenance?

A The only maintenance is cleaning with a damp cloth from time to time.

How long do solar panels last?

A Life expectancy is greater than 25 years depending on type. All parts are designed for outside use.

Is there something to stop electricity flowing back into the solar panel at night?

A Some solar panels have bypass diodes integrated into the panel to stop this but it is always worth checking on any proposed purchase.

What angle should my solar panel be positioned at?

A Try using a volt meter on the panel on a fairly bright day to see what is best for your location, but generally for the UK an angle of 35 - 45 degrees would be suitable.

Do solar panels still produce power on cloudy days?

A Solar panels continue to produce power but on a reduced basis.

Is the electricity produced by a solar panel different from other sources?

A The current produced is the same

How to measure the size of solar panels needed - EXAMPLE

Appliance Specified Power Running Time Per Day Consumption Per Day
Radio 15 watts 4.00 60 Watt hours P/day
Light 40 watts 5.00 200 Watt hours P/day
TV (colour) 40 watts 3.00 120 Watt hours P/day
Satellite Receiver 40 watts 3.00 120 Watt hours P/day
Total Watt Hours Per day     500 Watt Hours
Per day

According to the above example 500 watt hours per day usage would need solar panels equivalent to approximately 125 watts output (much bigger if mid-winter) for 5 hours exposure to produce enough power to cover the power consumption required. See other pages with solar systems examples Getting Started



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