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How does a solar energy system work?
Fundamentally, solar panels absorb the sun's rays and convert them to
electricity. This electricity can theoretically be used to power an electrical
device directly, although they are more commonly used to recharge a battery
(or bank or batteries). It is the battery that then powers the electrical
device(s). To manage the recharging of the battery, a device known as a
charge controller is used, which makes sure the charging process is
well-managed, that the battery is never over-charged and that the health and
lifetime of the battery is maintained. So, a basic installation consists of
a solar panel connected to a charge controller, in turn connected to a battery
from which the electrical devices take their power.
What type of devices can I power with solar panels?
There are no limitations – anything can be powered with a solar system as long
as the system is big enough to provide enough electricity.
NOTE: You should remember that many household devices, such as refrigerators
and televisions, need much MORE energy than you think.
Solar systems typically use 12V batteries (or two 12V batteries to produce 24V)
and therefore the electrical devices you wish to operate also need to be 12/24V.
If you wish to use 220/240V equipment, such as a standard TV or refrigerator,
you need to use a special device called an 'inverter'. An inverter changes
the 12/24V from the battery into 220/240V.
How does the weather affect a solar energy system?
Of course, solar panels need light from the sun to operate, so trying to use them in the dark is not a great idea! However, modern solar panels are incredibly efficient and are able to work effectively even on cloudy days and covered with (some) snow. In short, however, the more sun you have, the greater the amount of power produced by your panel. For a more detailed explanation, see our specific advice page
Effect of Weather on Solar Energy Production
What solar panel system do I need?
There are a number of different types of solar panel, from general purpose types such as the Kyocera range, to solar panels designed for specific purposes such as the Sunpower Marine range. You can also choose innovative Flexcell range, which are flexible panels that can be rolled up and taken anywhere. You do, however, need to work out what size panel you need to power your electrical devices. Our advice section Choosing a Solar Energy System will help.
Can I install a solar energy system myself?
Yes. For most types of installation, no specialist knowledge is required. For large systems, or for systems that you wish to connect to the mains grid, an installer may be necessary.
Do I have to look after my solar panels?
Well, it is of course not a great idea to jump up and down on your solar panel, but in general, modern solar panels are quite robust and need very little care and attention. Cleaning occasionally with a non-abrasive cleaner and checking the seals and electrical connections is all that is really necessary.
I can't decide, so what do I do?
If you can't decide which system you would like, simply call our advice hotline 0845 313 2250 and one of our team will help.
