If you are looking for increasing the efficiency then you should think how to increse the heat transfer coeffiecient using different ways for example you can use a green roof or use a vortex generateor.

Hi

There are many works on the increasing of the efficiency of the solar panel, including the use of air for cooling, and then re-use the hot air produced.

Please see the following references

Use indoor photovoltaic system with better material selection.

Article Implementation of the novel temperature controller and incre...

Thanks a lot Muhammad. I try

yes, try to get information about air cooled heat sinks

Thank you Pedro. I will try to use the recommendation. already use air cooling. I will test with water cooling and solar cooling system

Dear respected Germán Eduardo Dévora-Isiordia,

The methods/ways to increase the efficiency of solar panel:

1. Use of MPPT solar charge controller and MPPT solar inverter

2. Proper installation of the solar panel

3. Avoid dust and ensure that the surface is clean

4. Avoid shading of the surface of solar panel

5. Use of solar concentrator which help to focus the the solar irradiation on the solar panel

6. Using of accurate tilt angle and proper orientation of solar panel

7. Minimizing the effect of the ambient temperature by having power to control the ambient temperature.

Best regards

Kifilideen.

thanks for your support!