1. 1. Does The ECOMESH panel increase the electric production against a PV?
    The electric production of photovoltaic cellule depends on its temperature. The higher temperature, the lower production will be. Including a Transparent Insulating Cover (TIC) reduces the photovoltaic power of the panel 3% because of the energy losses in the crystal. Pumping water inside the panel refrigerates the photovoltaic cellule, making it work at lower temperature, and therefore, increasing its performance.

    In January the temperature of the hybrid solar panels is slightly lower than the PV ones, so their production is only increased by 1%. In July, using a variable flow pump, we limit the working temperature desired, being their production able to increase up to 15%.


    “It is important to differentiate between power and energy. Although power is slightly lower due to the CTA crystal, working at lower temperature, ECOMESH panels generate more power “.

  2. 2. Is it advisable the protection system of the drain back installations?
    The drain back is a protection system of the solar installations in case of frosts and overheating, when the primary pump is stopped, the fluid collectors are emptied.

    The pump stops when the fluid temperature is higher than 100ºC, after emptying panels, the internal air could reach up to 140ºC temperature. Both the time when the fluid temperature exceeds 85C, as the time when it is empty, the panels suffer conditions that reduce its durability, its useful life. This fact is common to all thermal panels, specially for hybrid solar panels because they suffer the photovoltaic laminate too.

    The recommended solution to not reduce the panel durability and protect them from overheating is to dissipate heat, so that the temperature does not exceed 85º C. It can dissipate for example, in a pool or through an aerotherm.

    A differential thermostat or regulator will be responsible for deriving the fluid to the dissipation point when this temperature is reached in the event of possible overheating. To prevent damage in case of frost, the same controller can be configured to recirculate the fluid before the temperature reaches 0°C.

  3. 3. Why to install an aerotherm?
    The reason to install an aerotherm is to protect the solar installation and to reduce the solar panels useful life because of the overheating. Aerotherm is responsible for dissipate the over-production. So, in this way, it avoids the temperature being over 85ºC and it makes sure that panels, pumps and circuits elements will not get damaged.
  4. 4. When tolls shall be applied and how they affect to the ECOMESH panels?
    There are three types of tolls: fixed term, variable term and access fee. The Type I rating is for self-consumption without dumping on the gird (for example a house). The Type II is for selling to the gird (solar parks). Generally, the hybrid panels are created to obtain self-consumption savings, so, usually it will get connected as Type I. In this type, if the power is lower than 10kW or the installation is in the islands, you do not have to pay any taxes. If it is more than 10kW, you will have to.

    In case of hybrid panels, as thermal generation is four times more than electrical generations, are more than the PV, where the tolls are applied to all their generation (electricity).

  5. 5. Could the hybrid solar panels be used for heating?
    Yes, they could and it is recommended to use emissions of low temperature as the radiant floor or low temperature fan coils. Applications for heating only be used when large contributions of solar energy in housing are desired, and attempt the heat generated by the panels in summer, have an additional application, such as a swimming pool, etc.
  6. 6. Which buildings are recommended to have ECOMESH panels?
    It is recommended in those buildings whit hot water consumption, that generally also they will have electrical consumption. In this way, you will save on utility bills (gas or diesel) and electricity, and will be less sensitive to changes in the price of energy.
    Especially for buildings with limited available space on the roof because ECOMESH panels produce electricity and heat in single panel making possible to have a solar installation which provides the energy needed.
    Application examples
  7. 7. Are the hybrid panels a good combination with an areotherm?
    Yes, they are, because the aerotherm consume electricity to heat up water. On the one hand, thanks to the ECOMESH panel production, the arotherm will have to heat up less water (because it has been preheated with the thermal production of the panels). On the other, a part of the electrical consumption will be provided by the own panels. Furthermore, this electricity saving will be in the principal hours of the day which generally the electricity prices are higher.
  8. 8. Are the hybrid panels a good combination with thermodynamic panels?
    A huge difference exists between hybrid and thermodynamic panels. The hybrid ones (like ECOMESH) provide electricity that can be consumed by any home equipment. However, the thermodynamic panels consume electricity. It is meant, the hybrid panels achieve savings in electricity bills, while thermodynamic panels are a consumption.
  9. 9. Can hybrid solar panels be used in swimming pools?
    One of the most suitable application for the hybrid solar panels are pools. The reason is because the range of the work temperatures is very low, and due to the fact that, the panel has a great thermal and electrical efficiency.

    Application examples

  10. 10. What happen with the excess power in summer?
    The main reason why the solar collector installations to heat water up do not work is because of the high temperature reached in Summer. This temperature is due two causes: in Summer hot water is less demanded and it generates more heat. If the water production is more than the consumption, the installation rises its temperature over 10ºC in an easy way and breaking the installation.

    For that, in Summer dissipation elements are needed like aerotherm, Drain back or evacuation pools. As an example, a 60kW aerotherm can dissipate heat and, as a consequence, protect 60 panels with an electrical consumption of 250 W. In conclusion, with electrical production of a hybrid panel protects 60 panels and the others 59 keep on generating electricity to provide electricity to the building.

  11. 11. How the legionella is combated?
    Legionella is a bacteria which is in the water. That bacteria in a temperature between 25 and 45ºC is reproduced very fast. So, the solar systems which usually works in those temperatures should have systems to protect themselves from that bacteria. To that, an hour a day the circuit warms up (70ºC), in that way, the bacteria boils and protects to the user.
  12. 12. What guarantee has the ECOMESH panel?
    The panel has 2-years guarantee. ECOMESH extends the guarantee to 5 years, when the panels are installed by a homologated installer (to consult homologated installers in each zone).

    Furthermore, this guarantee can be extended to 10years if the installation has been supervised by an equipment authorized by ECOMESH. That meets the requirements of a proper installation and has a monitoring service which allows to have a real time register of the principal operating parameters.

  13. 13. Who does the solar panels installations?
    ECOMESH has a Partner network installers at national level which are a guarantee of a proper installation of our equipment. In addition, we offer the homologation of your installation company so that it is able to install de hybrid panels. In this way, ECOMESH wants that their installations are done with highest possible quality.
  14. 14. Where shall I buy the ECOMESH hybrid solar panels?
    Check the locations of sell points on.
    Location points
  15. 15. How much can I save with an ECOMESH solar installation?
    The saving obtained with the panels depends on many factors: irradiation available in a place, the energy demanded, type of the additional system (boiler, thermoelectric, ect.) or fuel type (gas, disel, ect.).
    To have a reference: an installation of 20 panels in an apartment building, located in Madrid (Zone IV), with a gas boiler and 60% energy demand covered, each panel will save 200€ per year, and a return of invest around 6 years. If the installation is bigger or the fuel prize is more expensive, the amortization of the installation will be reduced.
  16. 16. It is legal installing ECOMESH hybrid solar panels?
    Yes, it is totally legal. Both the thermal and electric part it will be legalized. Depends on the installation size, contracted power, the type of the electrical configuration, etc. The legalization procedure is different. It is recommended to consult our technical department to comply with the legislation.
  17. 17. What happen with the extra electric energy?
    There are three mods of manage the extra power: using storage batteries in the own gird of the house, dumping it onto the grid or installing a device which avoid dumping electricity onto the gird.

    In case of hybrid panels, the energy which is not generated, the generation of hot water is increased, so that, the irradiation is exploited.

    This effect is proper of the hybrid panels and it is understood from its energetic balance. The PV doesn´t provide electricity and tends to get heater than to provide electricity. In the PVT case, the heat which tends to dissipate to the ambient, is recuperated by its inside fluid.

  18. 18. Can thermal panels be replaced by ECOMESH panels?
    Yes, they can. In fact, it is a usual practice when the thermal panels are deteriorated or their useful life have finished, they are replaced by hybrid panels. This situations is very interesting because of their profit as the large part of that installation can be make used by only replacing the collection system.
  19. 19. What certifications has the hybrid solar panels?
    The panel has all the quality certificates to ensure its durability and efficiency by the CENER lab.

  20. 20. Welding fitting of ECOMESH PVT
    People identify it as tin welding, which usually is soft solder. The soft solder is not recommended in solar installations as high temperatures (very frequents in solar installations) losses its properties.
    Our weldering supports up to 238ºC. That is to say, that even it is solder based on tin, it supports a lower temperature than stagnation temperature.