Solar Thermal Engery - ratiotherm Smart Energy Systems

High efficiency of solar thermal energy

Unlike solar systems designed purely for use in good weather, flat-plate collectors capture and utilize even the slightest rays of sunshine—even in high fog conditions. When combined with the Oskar° stratified storage tank or hybrid heat pumps, heat gains are recorded even at water temperatures below 35°C.

Our flat-plate collector can be combined with a solar thermal system, both with traditional fossil fuel-fired boilers and with other renewable energy devices. Our flat-plate collector is manufactured at our site in Dollnstein and therefore also bears the “Made in Germany” seal of quality.

The advantages of our flat-plate collector at a glance:

Use of minimal solar radiation thanks to highly selective Tinox vacuum coating
Durable thanks to hail-proof safety glass
Designed with double-walled aluminum frame for maximum stability of the flat-plate collector.
Cutting ring connections for permanent tightness in all weather conditions and temperatures

See for yourself:

Our proven products from the solar thermal energy sector

PVT Collector

New generation of solar collectors

Flat-Plate Collector RA 251-4

With highly selective Tinox vacuum coating for maximum solar heat yields

Using solar thermal energy intelligently

The potential of the sun as a free source of energy for heating systems is not being exploited to its fullest extent. With the help of our flat-plate collector, solar energy can almost single-handedly provide hot water during the transition periods and in summer, and even in winter it helps to reduce the consumption of other energy sources to a minimum. However, it is important for solar-assisted heating that the flat-plate collectors on the roof are tilted at an angle of approx. 45° to the sun.

This is the only way to capture every ray of the low winter sun. At the same time, this measure prevents stagnation (i.e., the circulation pump switching off when the stratified storage tank is 100% filled with heat) in the flat-plate collector, especially in summer when solar radiation usually exceeds demand. Our flat-plate collector features sophisticated technology and is extremely durable. Over two million flat-plate collectors are installed on roofs in Germany. Solar heat is also subsidized by the government. For existing single-family homes, up to a quarter of expensive heating oil or natural gas consumption can be avoided without any problems.

FAQ: Questions & answers about solar thermal energy

How long does a solar thermal system last?

Solar thermal hot water systems, also known as solar thermal systems, have a slightly shorter service life than photovoltaic systems. As a rule, a solar thermal system lasts 20 to 25 years. The service life depends on factors such as the quality of the components, the installation, and maintenance.

Which is better, solar thermal energy or photovoltaics?

Whether solar thermal energy or photovoltaics is better depends on individual needs. Solar thermal energy is more efficient at generating heat and is well suited for hot water production and heating support. Photovoltaics generates electricity that can be used in many ways and is more advantageous for high electricity consumption, especially if you want to use the electricity you generate yourself or plan to combine it with an electricity storage system.

Can you heat with solar energy in winter?

Yes, you can heat with solar energy in winter, especially in combination with a heat pump.

Does solar heating also work at night?

Solar water heaters can actually provide hot water at night. They work with a backup system when the sun goes down. This backup can be a gas or electric heater.

Can a house be heated solely with solar energy?

If you want to heat your house or apartment with solar heating during the winter months, you will need an additional heating solution to cover the increased heating demand. Unfortunately, it is not possible to heat your home in Germany in winter using solar thermal energy alone.

How often does a solar thermal system need to be serviced?

In addition to simple inspections, the BDH recommends having comprehensive maintenance carried out on solar thermal systems every three to five years. This goes beyond inspection and includes the following measures, among others: Thorough visual inspection of all fittings, connections, and joints.

How many solar thermal modules do I need?

As a rule of thumb, you need about one square meter of space per person to generate enough hot water in summer. For flat-plate collectors, this usually means one collector for a small household and two collectors for a large household. For tube collectors, you may need 20 or 30 tubes, depending on your household and hot water requirements.

How often does the fluid in the solar system need to be changed?

It is normal for the fluid to age over time and should generally be replaced completely after around 10 to 12 years. However, the aging process can be accelerated by external influences.