Frequently asked questions
Q - Are solar heating
A - No. And they don't have to be expensive. Although some
high pressure salespeople have been known to offer systems
for £12,000 reduced on the day to £8000, you
can actually have just as good a system or better installed
by us from £3000 + without the high pressure!
What's more a solar system will add to the resale value of
Q - Will water be heated
on a cloudy day?
A - Yes. Although the heat output of the solar collector
is reduced on overcast days it will still be able to provide
heating. If it is a heavily clouded day or raining, then
more gas or electric boosting may be required to maintain
water at the required temperature. This system will be automated
so you don't have to worry about running out of hot water
on a rainy day.
Q - How long will it
A - Typically solar systems will last 20 years or more. There
is very little maintenance required, a visual check each
year and every 5 years replace the antifreeze in the sealed
Q - Is solar energy
A - As you know nothing is free in this world but..! If you
take a new build home and compare the cost of installing
a solar system with the cost of installing a boiler system
then the installation costs are broadly similar. However
from this point the similarity ends. For every kW of energy
you use the solar system will be FREE but with gas oil or
electricity you will also pay £0.15 + per kW plus VAT
and energy prices have risen 3 times in the last 18 Months
by an average 12% each occasion.
Q - My roof doesn't
face south can i have solar?
A - Typically solar panels are installed to the roof but
in some instances they can be attached with a mounting bracket
to a gable wall or balcony, therefore most homes can have
Q - What are the two
main types of solar collectors?
A - Flat panel collectors- operate by absorbing
the sun rays through the surface of an absorber. The absorber
is made of copper sheet, covered with absorption layer made
usually of black chrome or titanium.To the bottom of absorber
are soldered thin copper pipes, through which an unfreezable
liquid goes. Under the absorber the collector is isolated
with mineral wool and from upper side the collector is covered
by a special, hardened glass resistant to hail and specially
coated.The box of the collector is made of aluminium sheet.
Evacuated Tube Collectors -are
constructed of glass solar collector tubes, containing
a second inner tube with a selective coating.
The space between the outer tube and inner tube
is evacuated and maintained at a high vacuum
eliminating all heat loss by conduction and convection.
Solar radiation passes through the highly transparent
outer glass tube and reaches the solar selective
coating on the outside of the inner tube. The
solar selective coating absorbs the solar radiation
and converts it to thermal energy. The heating
of liquid in vacuum tube collectors may works
in two ways: By a direct flow through a copper
pipe, which consist of two channels and soldered
to absorber. By one copper channel, filled with
an easily vaporising liquid which when it boils,
flows up to the end of pipe. This pipe is called
a "heat pipe". The end of pipe is fitted
with a condenser which gives up the heat to the
liquid in the manifold.