solarPhotovoltaic systems connected to the network, this application is to generate electricity using photovoltaic solar panels and inject it directly to the electrical distribution network. Currently, in countries like Spain, Germany or Japan, electric distribution companies are obliged by law to purchase the energy injected into the network by these photovoltaic power stations.

The selling price of energy is also fixed by law so solar electricity production is encouraged to be these callable facilities over a period of time that can vary between 7 and 10 years.

This type of photovoltaic power stations can range from small installations of 1 to 5 kwp on our terrace or roof, to facilities of up to 100 kwp on roofs of industrial buildings or in soil, and even plants of several megawatts.

The solar thermal system works in the following way:

The solar panel captures the Sun’s rays, absorbing its energy in the form of heat, thus through solar panel we pass a fluid (usually water) so that part of the heat absorbed by the panel is transferred to the fluid, the fluid raises its temperature and is stored or directly brought to the point of consumption.


1. using thermal panels that can be placed on the roofs of the houses, the rays of the Sun (direct, diffuse and reflected solar radiation) can be used to heat water and provide heating to housing.

2. from the panel, the liquid flows through an hydraulic circuit, consisting of pipes, pumps, valves, etc. that are responsible for driving the hot fluid movement from shooting to the accumulation system system and this consumption network.

3. an accumulation system constituted by a tank that stores the hot water until it is needed use. It is called the solar storage tank.

4. from there, enter in a heat exchanger which heats water which will be used in the dwelling.

5. the water out of this heat exchanger at a temperature suitable for use (hot water). The cooled liquid is carried back to the solar collector to repeat the cycle.