Photo Voltaics -
the first part of
the word being 'photo' which means 'light' and the second being
'volt' which is a unit to measure electrical voltage. 'Photo
Voltaics' literally means 'electricity from light' - converting
light into electricity.
Do Solar PV Panels Work?
panels consist of PV cells encased in a metal frame covered in
a thin layer of glass, which are attached to your roof. Each
cell is made from one or two layers of semi-conducting
material, usually silicone. When light shines on the cell it
creates an electric field across the layers, the stronger the
light, the more electricity is produced .
strength of a PV cell is measured in kilowatt peak (kWp). This
is the amount of energy the cell generates in full
hits the photovoltaic cell and is converted into clean sustainable
electricity. The inverter converts the electricity from direct
current (DC) to alternating current (AC), for use in the home.
When the solar energy system is producing more power than is needed, it
is exported (sold back) to the grid. At night, power is imported
from the grid in the normal way.
Will they work in winter?
solar panels work all year round. The important thing to bear in
mind is that solar power depends on the intensity of the light, not
just direct sunlight. So even when it's overcast and raining,
your solar panels will be producing clean electricity to help
power your home. Even in winter, in the shorter days, they will
be generating electricity.
they Suitable For My Property?
work best on buildings with roofs that face South, South East
or South West. Your property must be free from anything that
overshadows the roof i.e. building or trees. If the
roof is in shadow for part of the day, the effectiveness of the
system can decrease, however, this does not mean solar panels
cannot be fitted, Our surveyor will advise you when he
assesses your property.
I Need Planning Permission?
most cases, planning permission is not needed, however, if
you live in a conservation area or listed building, we would
always recommend checking with your local planning authority
Much Roof Space Will I Need?
more roof space, the better. However, we design the systems to
suit your roof and budget.
Much Electricity Will It Generate?
are five main factors that will impact on how much energy your solar
PV system will generate:
total size of the PV array (measured in Kw)
latitude of the location.
direction the PV panels face.
slope (angle of your roof) the panels are mounted on.
which shades the panels.
It Provide All My Electricity?
This depends on what your household power consumption is. The easiest way
to calculate this figure, is to have a look at your previous
bills. For example, The Energy Saving Trust calculates that the
average three bedroom house uses 3300KWh a year (assuming
cooking etc are on a non electricity supply).
if I produce more energy than I need?
Whenever your panels are
producing more electricity than your home is using, it will flow
back into the grid for other homes to use. The great news is,
you will be getting paid for this. This means you can be sure
your energy bills will be even less and none of your clean,
green electricity will be wasted.
solar power expensive and what are the benefits?
to existing properties start from £2,995.
the initial outlay, there are several financial advantages
to installing a solar PV system:
free income for 20 years index linked to inflation
Helps 'future proof' your home against rising fuel prices
property doubly attractive to price
conscious house buyers
As fuel prices continue to rise, energy efficient renewably
powered homes will continue to sell at a premium
long will it take to install?
average domestic system will take 2 days to install.
there be a mess?
Our installers will lay dust sheets in the house and
thoroughly clean up after they have finished.
the workmanship and the installation guaranteed?
are accredited solar PV installers and members of the REAL
Assurance Scheme. We offer a 10 year workmanship guarantee from
the date of installation. The inverters carry a standard 5 year
warranty which can be extended to 25 years (ask the surveyor for
details). All our panels carry a 5 year warranty and a 20 year +
it still generate electricity for my use if there is a power cut?
The inverter needs a mains supply to operate. This is a safety
feature which stops your system from feeding back into the grid
when there may be someone working on a fault on the grid.
maintenance is required?
require very little maintenance other than ensuring that shading
from trees etc doesn't become a problem. Solar photovoltaic
systems are silent in operation, have no moving parts and are
virtually maintenance free.
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