what are solar modules?

Most of the solar modules that are available on the market are based on crystalline silicium as the main component. They are divided into two types: The monocrystalline and the polycrystalline solar modules.

The polycrystalline modules are composed from several different siliciumcrystals - hence the name polycrystalline - while the monocrystalline modules are made from one single crystal.

The difference in performace between the two types are quite small. The monocrystalline modules might produce more power when the sun is at a right angle to the module in clear weather, but in more diffused light - in cloudy weather or with the sun more angled - the difference between the two types become less. This is because the polycrystalline modules has crystals which are angled differently. This way, there are always crystals with an optimum angle - no matter the direction of the light.

In general, it is estimated that polycrystalline modules can convert about 15-16% of the sunlight to energy, corresponding to an efficiency of 158 kWp pr. m2.

The monocrystalline modules reaches about 16-18%, and a production of 164 kWp pr. m2. Among others, the type of inverter, placement of the modules, shadow and so on.

It is our experience that the energy production over a whole year for the two types are basically the same.


We can deliver most european and chinese modules

You can see below, which solar module manufacturers we primarily use. If you have any special requirements, we will of course fulfill them. We are totally independent and only serve your interest.

Things are happening really fast in the solar power business, and we can therefore not guarantee that every type of module are in stock. If we dont have a specific module, we will be able to find an alternative of the same quality.

All solar module manufacturers offer:

  • 10 years guarantee on the products (Hanwha Solar One even offer 12 years)
  • min. 90 % productivity in 10 years.
  • min. 80 % productivity in 25 years.

Polycrystalline modules

Polycrystalline modules are made from different silicium crystal, hence the name. They have a bluish hue, and sharp edges on the cells.

Polycrystalline solar modules are the most used type in the world, and are in most cases the type you see used in larger plants on buildings and in solar parks.

The price is the main influence on the popularity of the polycrystalline modules. They are both cheap to make, and have a good durability.

Monokrystallinske celler

Monocrystalline cells are made from a single crystal. They are normally black or grey with a uniform surface. This is why this type are used if black modules are needed.

The monocrystalline cells are cut from a round block of silicium, and have therefore round edges.

Thinfilm modules

Thinfilm modules are, as the name implies, made from many thin layers of film that are put together. The performance pr square meter is not as good as for the other types, but the development are improving this at a constant rate which we follow closely.

Thinfilm modules have among other the advantage that they have a very nice and even surface without soldering.


If you want to know more about solar powerplants, then write your name and phone number, and we ill get in contact with you as soon as possible.

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ATsolar Aps

CVR: 32348734​

Lollandsgade 4

DK - 6400 Sønderborg​