SOLAR WATER HEATERS Vs PVS or Both?
 What should I choose?

• Some argue that it is preferable to install PVs to generate both electricity and hot water.
This is a bad technical solution. Thermal solar water heaters generate hot water utilizing solar energy with an efficiency of about 60% while photovoltaics have a corresponding efficiency of about 15%. It is inefficient to produce from the sun a "high quality" form of energy (electrical) to transform it to a lower form (heat), for the needs of hot water, when we can do this directly with four times better efficiency.
For this reason in many countries where PV installation is subsidized, the installation of thermal solar (solar water heater) to meet the needs of hot water is mandatory.

• Does the Thermal solar installation, excludes a photovoltaic installation?
The surface required for a classic Mediterranean home roof to install a solar water heater is about 4 - 6 m2, which means there is certainly plenty of area left to install a photovoltaic system to meet electricity needs or sell it to the network.

• Does a solar water heater lose its efficiency overtime?
In contrary to a PV system that loses its efficiency during the years and has a big cost of initial investment, a solar water heater MALTEZOS never loses its efficiency during its lifespan*. 

 • Verdict! 
MALTEZOS SA recommends you to combine PVs systems with Thermal solar water heating systems in order to achieve the highest energy saving with the use of Renewables Sources of Energy. 

Ask our sales consultants to suggest you the best solution for your residence!

* The maintenance service is recommended for the validity of the system warranty.