Installation panneaux solaire Terreal

How is a photovoltaic panel installed ?

The installation of solar panels must be carried out by roofing and cladding professionals who will ensure perfect results. There are two ways to install a photovoltaic panel: overlaid or integrated. 

  •  Solar panels can also be fixed straight onto the tiles of an existing roof. This is the cheapest solution, because it is faster, but the panels are visible. 
  • Integrated into the roofwork, photovoltaic panels simply replace regular roofing tiles. They are installed during the roof construction or renovation phase. In this case, it makes financial sense to include the panels in the overall cost of the work. 

The roofer fixes rails to the roof to accommodate the structure, then installs the solar panels themselves. They then connect the inverter, regulator and meter before laying the wiring. If you plan to sell back any surplus power, you need to request a connection to the grid. 

Which panels should you choose for a standalone solar system?

What is the difference between a photovoltaic panel and a thermal panel?  

Photovoltaic panels capture sunlight and convert it directly into electricity for use by electrical appliances, heating systems and domestic hot water systems. Thermal panels capture the sun's thermal energy, which is then mainly used for heating and domestic hot water systems via a hot water tank.  

Photovoltaic panels have the advantage of working even in cooler temperatures and low brightness levels. Their yield is obviously lower, but not insignificant. It is advisable to use storage batteries to avoid power outages. 


Which photovoltaic panels should you choose for a solar system? 

Monocrystalline solar panels are more efficient than polycrystalline solar panels as they have a 16% to 24% yield rate compared to 14% to 20%.  

With high electrical power (rated kWc) and high photovoltaic panel efficiency, your standalone solar installation will be efficient and cost effective.  

Criteria to consider for your solar installation

  • Building requirements: for optimal efficiency, install enough solar panels with sufficient power to cover all your energy consumption, or even more if you want to sell the surplus electricity to an energy supplier. 
  • Product quality: always opt for certified products, preferably made in France and guaranteed. As the quality of your solar panels is paramount, the quality of the equipment is no less so. 
  • Direction: to capture maximum sunlight, the solar panels must be south-facing. As this is not always possible, a south-east or south-west direction will also offer efficient yield rates. An east or west-facing installation will enjoy full sunshine in the morning and afternoon, but the yield will be a little lower. However, north, north-east and north-west-facing panels receive too little light to be of use to a solar installation.  
  • Tilt of the solar panel: for maximum efficiency, it must be at an angle of 30° to 35°. If the slope of the roof is greater or small than this, a professional will be able to adjust the solar panel installation to achieve the best angle. 
  • Shaded areas: any overhanging branches of nearby trees will need pruning if they create a shadow over the panels. 
  • Company values and commitments: A serious supplier offers a minimum 25-year warranty, a personalised quote and follow-up. TERREAL, a specialist in roofing and green and innovative solutions, supports its customers in their efforts to make the right energy choices (official registration, consultations, connection to the grid to sell back surplus energy, financial support etc.). 

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