Yes, almost any owner of a detached, ‘semi-detached’ or terraced house can install a photovoltaic system, but there are several factors to consider before investing:

• Sunlight conditions - the roof or grounds should receive good sunlight for most of the day.
• Local regulations - some regions may have restrictions on installation, especially in conservation areas.

Condition of the electrical installation - if the installation is not working properly, it should be repaired before connecting the photovoltaic installation, primarily for your own safety.

The best place for installation is on the roof or in an area with maximum sunlight. Avoid:

• Sites with shading caused by trees, chimneys or other buildings.
• Orienting the modules towards the north.

Optimal directions are:

• South directions - provides the greatest efficiency.
• East and/or west - alternative when the roof is not oriented perfectly to the south; allows maximum self-consumption, due to the highest production in the morning and afternoon ‘peak’ consumption of the house.

The best angle for the panels in Poland is 30-40 degrees.

• In summer - a lower angle (around 30°) makes better use of the high sun.
• In winter - a higher angle (around 40°) makes better use of the low sun.

If the roof has a slight slope (it is shaped like a ‘flat’ roof), so-called Ekieri, or mounting triangles, are used to achieve the optimal angle of the module in relation to the sun.

The installation of a photovoltaic system can theoretically be done by yourself, but it is risky and not recommended. It requires:

• Technical expertise,
• Tools and installation skills,
• Consideration of electrical safety standards,

Incorrect installation can lead to damage to the system, reduced efficiency and even a fire hazard. It is therefore worth entrusting this task to professional installers. In addition, by choosing an installation service, you can count on receiving a subsidy from the government's My Current programme.

When selecting panels, it is worth paying attention to:

• Technology - n-type monocrystalline panels more efficient and durable than the outgoing p-type generation of modules.
• Efficiency - the higher the efficiency of the panels, the better the use of available space.
• Warranty - reputable companies offer a warranty of 12 years or more.
• Certification - panels should be grid connected and must have the appropriate certification such as IEC 61215, IEC 61730.

The lifetime of the installation is approximately 25-30 years, but the panels can last even longer, albeit with a slightly lower efficiency. The lifetime of the installation is influenced by:

• Quality of components - better materials guarantee longer life and reliability.
• Weather conditions - hail, snow or extreme temperatures can accelerate degradation.

Regular maintenance - cleaning and inspection increase the life of the system

Photovoltaics are an investment in the future that saves energy and protects the environment. To get the most out of your installation, it is advisable to plan the installation carefully, use professionals and ensure that the system is serviced regularly. Remember that the quality of the components and the correctness of the installation affect not only the efficiency, but also the safety and durability of the installation.
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