How long does it take for the Solar Energy System investments
to be paid back?
The payback time of the solar energy systems depends on the
usage of the hot water. Normally it takes 1 to 2 years for the
investment to be paid back. After then the water will be heated
Where are the solar energy systems utilized the most?
( Central Systems )
At which time of the year do the solar systems perform well?
The hot water can be obtained all the year with the selective
plate solar collectors ( S series ), if matt-black painted collectors
are used, it is hard to have warm/hot water for four months only
in winter, other times it works.
4. Are the solar energy systems utilized
enough in heating the water in Istanbul?
Turkey is a country that has abundant sun light, for that reason
all throughout the country, the solar collectors may be used to
heat the water. In such countries like Germany, USA there are
as many solar collectors as Turkey has installed.
the solar energy collector systems provide water when the weather
is sunny? During daylight?
No. The systems are produced to provide hot water all the day,
24 hours. The water that's heated during daylight is stored in
an insulated heat exchanger ( Boiler ) for that reason the hot
water is ready to be used 24 hours.
Do the Solar Energy Systems produce electricity?
No. They are used to provide hot water only.
Are the solar energy systems environmentaly friendly?
The raw materials other than the insulation material are % 100
recycleable. Solar energy systems are environmentaly friendly
systems; with the utilization of the solar energy systems, the
consumption of the gas, liquid and solid fuel is decreased, thus
the release of such poisonous gasses like CO2, CO, SO2, NOx to
the atmosphere is prevented. SO2 is the main reason for the acid
rains, the respiration of the CO may cause anemia health problems.
NOx cause physical, asphyxia health problems. The solar energy
systems are real environmentaly friendly systems.
How do you acquire the raw material?
The raw material is obtained from the domestic supplier as much
as possible, thus the prices of the products are not affected
from the fluctuations in the foreign exchange rate.
For which areas are the open loop and closed loop systems are
For the areas where there is not a risk of main water freezing
and lime open loop systems can be used. Because of the circulation
of the city water in the solar collector in the open loop systems,
the water channels of the collector calcified, by the time calcification
decreases the efficiency of the solar collectors initially. Lime,
clogs the water channels of the collector and the solar collector
does not operate at all. Also if the water in the collector is
not removed during winter, the collector may explode due to the
freezing water. In closed loop systems there are no such problems.
Closed loop systems are mainly used in cold areas. If the system
is drained in winter open loop systems can be used in cold areas.
Would you compare the solar energy and the heat pump systems?
There is a inevitable electricity expense in the heat pump systems.
Although the electricity expense is much lower with regards to
natural gas and electrical heating systems, there is no electricity
expense in solar energy systems.
Does the snow and the hail harm the solar collectors?
Normally the snow that is collected on the roof will also collect
on the collector. Becouse of the geometry and the installation
angle of the collector the amount of snow that will collect on
the collector will be low. In the regions where it snows very
much, there is a space left between the roof and the collector
system to prevent the collection of snow behind the system, the
system is installed by the expert teams of installation. Tempered
glass is used in the solar collectors, thus the snow and harm
does not, can not harm the systems.
How much electricity do the pumps used in solar energy systems
Generally pumps that require 30 - 90 W electricity are used in
solar energy systems. If we assume that the pumps are used for
4 hours during the day, it is clear that the electricity consumption
is very low.
Do the systems need to be faced to south?
The solar collectors must be faced to south, by under special
conditions the collectors can be installed to have a 15° angle
with respect to east or west, facing south.
What are the differences between the selective solar collectors
and the matt-black painted collectors? Under which conditions
the selective solar collectors are preferred?
Because the top heat losses in selective solar collectors are
very low, they provide more heat to the water. The selective solar
collectors are most commonly used at;
in energy saving in the industry where there is a need for heating
the sunlight intensity is low
there is not enough space for the collector to install
Does a great mass occur during the installation?
No, the installation teams work very carefully.