Where are solar panels prohibited on the roof

In addition to ecological insulation and sustainable building materials, solar energy is an important part of the ecological construction. There are two different ways to use solar energy sensibly: A photovoltaic or a solar thermal system.

Appropriate systems ensure that you can live more independently of electricity, gas, oil and other providers in the future. The advantages are not only in the cost savings. Which Type of solar system makes sense to you, see the following sections.

Solar thermal - solar energy for warm water and for warm four walls

The solar thermal is for the Hot water preparation and used for heating. With this you can save some costs and guarantee an environmentally friendly type of heating. In the following we would like to bring you closer to the most important facts about solar thermal energy.

Structure and functionality of a solar system on the roof

The solar thermal consists of two elements:

  1. Solar panels that absorb the sun's rays
  2. Solar storage tank for storing heat

Both elements are connected by pipes to form a closed system. This is where the solar fluid is located, which transports the heat generated and usually consists of a mixture of water and antifreeze. The solar pump ensures that the Fluid through the system can move.

The solar controller recognizes as soon as heat is required in the storage tank and switches theSolar pump at. The pump transports new heat to the storage tank. Membrane expansion vessels within the system ensure an even pressure so that the water pressure does not damage the individual components, especially the pipes of the system.

The system uses one to transfer the heat from the solar fluid to the drinking water or the water for heating Heat exchanger. This can be integrated in the memory or in an external line. A layer separates the solar fluid from the water to be heated. In this way, the two liquids do not come into contact and cannot mix. The heat can still be transferred from the warmer solar fluid to the cold water.

Uses of solar thermal energy

With solar thermal you can Heat drinking water or use it to heat your home. If you only want to heat water with solar thermal energy, a smaller area is sufficient for the solar collectors as well as a smaller heat store.

If you use solar thermal energy for heating, both elements must be larger and are more cost-intensive. A solar thermal system is particularly worthwhile in autumn and spring, because at these times of the year you can use the entire Cover heating requirements can. How much you save in heating energy ultimately depends on the insulation of your home. In a low-energy house, you can cover up to 60 percent of your heating requirements with solar thermal energy, and up to 20 percent in a house with normal insulation.

The solar panels can hold up to 50 percent of the Convert solar energy into usable energies. However, the energy from the solar system on the roof is mainly absorbed in summer, i.e. especially at the time of year when you have little or no heating. This means that a large part of the solar energy remains unused, which reduces the efficiency of the system.

Storage types and combination options for solar thermal energy

Solar thermal systems can following types of solar storage have:

  • Drinking water storage tank for hot water production
  • Buffer storage tank for heating the house
  • Combination storage tank for both the production of hot water and for heating
  • Stratified storage tank for easier use of warm water
  • Long-term storage for storing summer heat for several months

Because you usually cannot cover the entire heating requirement with solar thermal energy, you have to combine the system with other heating options. Between the following Possible combinationsyou can decide:

  • Geothermal and solar thermal
  • Gas heating and solar thermal
  • Oil heating and solar thermal
  • Pellet heating and solar thermal

Photovoltaics - solar power for the home socket

If, on the other hand, you would like to use solar energy for power supply, a photovoltaic system is the right choice for you. With this you can produce electricity independently and even feed it into the power grid for a flat fee. The following overview should give you a better insight into the technology.

Photovoltaics - structure and functionality

Photovoltaic systems are Generators that convert light into electricity. The word “photo” refers to light and “voltaic” to the current unit volt. The corresponding solar modules can be attached to your facade, for example. Solar modules on the roof are mostly common, balcony solar modules are also an option in sustainable construction. A carport or an open area that you have at your disposal are also possible locations.

An inverter converts the direct current that the solar modules produce into alternating current. The entire system is connected by a cable system. Since the sun doesn't shine all day long, a Photovoltaic storage systems store the electricityso that you can use it later in the evening or on particularly cloudy days.

What type of surface and solar modules are suitable for a photovoltaic system?

Basically is suitable any roof shape for a solar system on the roof. Make sure, however, that the substructure of your roof not only withstands the weight of the modules, but also that there are no problems whatsoever in wind and snow. The size of the solar surface determines how much electricity you can produce with your photovoltaic system. So you should make the most of the space available to you. However, photovoltaics on a flat roof is only possible in exceptional cases due to the slight incline.

For one or two family houses you can Silicon or thin film modules use. However, always make sure that the solar surface is ideally aligned and is not covered by the shadow of neighboring houses. Modules made of silicon require vertical light irradiation as far as possible.

Cost and service life of a photovoltaic system

A saving should also be worthwhile, because the Cost of a photovoltaic system are between 6,000 and 21,000 euros. In addition, there are costs for insurance, inspections and cleaning, which amount to 200 to 300 euros per year.

Experience shows that the lifespan of photovoltaic systems is longer, but one generally assumes one Useful life of 20 years out. You can then decide whether you want to continue using the system and the modules if they are still functional, or whether you want to dismantle the system or replace the solar modules.

However, it is advisable to plan and take precautions in advance. In this way, you can take advantage of the corresponding financing and funding models at the given point in time. According to information from the Federal Environment Agency, 80 percent of old systems can be recycled.

Photovoltaic and solar thermal - a combination of both variants

A compromise solution is the combination of solar thermal and photovoltaic systems. It can be act as two separate systems or act as hybrid modulesthat can produce both electricity and heat.

Solar system on the roof thanks to the Rathscheck slate system

The Rathscheck Schiefer-System is an innovative roofing system, with which slate can be brought onto your roof quickly and easily. The click system can also save weight on the roof. It is particularly practical that solar modules can be inserted flush into the slate cover. This eliminates the need for bulky, heavy solar panels on the roof - and you can still benefit from photovoltaics.