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When planning a solar energy system, it is the most important to find a suitable place to install the solar panels. Solar panels should face south and no shadows should fall onto them (particularly at noon) as this reduces productivity. If there is no suitable roof surface, it is possible to install solar panels on the ground or building façades. The optimum angle for the solar panels is 38–40 degrees, which ensures the greatest productivity year round.

When installing solar panels on the roof, the condition of the roof should be inspected. If during the next few years a change of roofing is planned, it is possible to use solar panels that replace the roofing material in addition to energy production. This two-in-one solution suits almost all roofing types and gives the building a new bright appearance.

päikesepaneelide paigaldamine

In addition, it is possible to use solar panels when building or renovating a shelter for a vehicle. How large a system is suitable for your home depends on the arrangement of solar panels as well as the energy consumption.

The performance of solar panels varies by year and we use the European Commission’s solar energy calculator PV-GISto assess the annual average performance of a system and calculate the annual average performance of solar panels. If you enter the power and location of the system, the slope and direction of the solar panels into the calculator, the average performance of the last fifty years is calculated.

We compared the calculator’s data with the actual performance of the solar panel installation at a private residence in Saku, Harju County, Estonia.
solar panel estoniaIf you wish to save on energy expenditure and fix your electricity price for years, solar power is the right choice. In addition to energy savings, it is possible to raise the energy performance class label and the price of one’s real estate by using solar panels.

Adopting solar panels is a good investment to ensure saving even after several years.