Our solar plants are not from a cheap mass production, but rather self-developed and high-efficient products, which are tested regularly, for example with the tightened hail storm test, by a
foreign institution for safety and quality. We strictly follow the Eco-Design rules, to produce even more efficient products and provide the collector yield label, that shows with one glance what
our products have to offer when it comes to power and outcome. Get more information about our products and their characteristics. If you have any further questions, we are happy to help you
personally at any time.
The NARVA full vacuum tube
Solar collectors must be insulated, so that the collected heat from the sun's rays is not immediately returned to the environment. Flat-plate collectors
are insulated with special insulating materials. Rock wool is used very often, because it has a good insulating effect, but is very poor compared to a vacuum. In order to further improve
solar collectors and their heat losses, vacuum tubes have been developed. There are single-walled and double-walled vacuum tubes on the market. The majority of collector manufacturers use
double-walled vacuum tubes.
We not only offer our customers high-quality, efficient collectors, but more so security against hail damage. The frequency and intensity of storms in Germany increases. Especially
thunder, strong rain and hail can lead to big damages to houses and installed plants. In order that our customers can be easy with the topic hail storm, we checked the NARVA tubes with a
special endurance testing by the TÜV Rheinland. In the past the collectors have resisted 25 mm ice balls with a speed of 83 km/h. During our new hail storm test, with the hail resistance
level of 4, the collectors, especially the tubes, were shot by 40 mm ice balls with a speed of 100 km/h. You can see the test with a high speed camera HERE!
environmentally friendly solar plants
Having environmentally friendly solar plants doesn’t only mean that they reduce emission, but more so that they were designed after the Eco-Design rules and that they have a collector yield
label. We want to do more than just make a small contribution to environmental protection and not just manufacture solar collectors for residential and commercial applications. We want to respect
and value the people and the environment, especially when it comes to the production and development of our high-efficient products. To show our customers very clearly, how efficient our
collectors are, the are marked with the collector yield label.
The aim is to increase the efficiency of energy-related products by laying down minimum efficiency standards. This contains a labeling requirement in form of labels for heating devices.
These labels do already exist on household and electro appliances. Comparability is created through the classification into energy efficiency classes and awarding of the product labels
that have a similar purpose. What has been applied for household and climate appliances as well as pumps becomes effective on the 26th September 2015. The requirements will be raised in
the following years. The new Eco-Design rules are based on the directive 2009/125/EC, EU-regulations no. 811/2013 and no. 812/2013.
The following product groups are affected:
Water heaters and room heating devices with a heat nominal capacity of maximum 70 kW and a container volume of maximum 500 l must be labeled. Larger storage tanks must comply a
threshold only. A complete system receives a label as well (package label).
Water heaters and room heating devices with a nominal heat capacity of maximum 400 kW and a container volume of maximum 2000 l (gas, oil, electro pumps, heat pumps, cogeneration)
Single components, such as storage tank and heating boilers, are rated separately. The entire system is rated additionally (combined heating system, integrated facility, package).
These ratings are marked with a label.
What has to be kept in mind?
From the 26th September 2015, advertisements that include information about the price and performance must contain the efficiency class.
The classification into energy efficiency classes occures through self-declaration. Only the certification of the thermal efficiency factor is carried out by accredited testing
When comparing two products with different efficiency classifications, the one with a lower classification can cause significantly lower costs.
The majority of appliances obtains an own efficiency assessment. Specific system components can enhance systems through bonus points. Heater and storage tanks have their own
efficiency label whereas solar collectors and controller enhance the system through bonus points.
It is politically desired that every electro heat pump has a better energy efficiency class than gas-fired condensing boilers. This implies that a cheap product with a small COP
has a better energy efficiency class than any high tech gas-fired condensing boiler although it has higher energy costs for the consumer.
The label of individual components, e.g. heater or water heaters, are attached by the manufacturers. These carry responsibility for the furnished particulars.
Even considerable differences of the COP and the seasonal performance factor are not relevant.
From fall 2015 regulations will be effective in whole Europe specifying the use of condense technology due to the ErP minimum efficiency criteria, conventional heating boilers
will disappear by and by.
Specialized crafts and planners are not in duty to verify the manufacturer; they have to rely on the manufacturer. There is no liability risk for them. The data and details are
assumed in practice to comply the requirement towards the final customers or they are used for determining the package label. The efficiency label will be a part of the CE
certification in the future. Appliances without the CE marking do not have marketability.
When a craftsman compiles a package, he has to issue the label on his own.
Already existing systems have grandfathering. When adding a solar system or a storage tank to an existing room heater, the craft does not need to determine a new package label.
Collector Yield label
The collector yield label is an optional product label for manufacturer of solar thermal systems. It enables consumers to catch up on performance and earnings power of different solar
collectors to find the most suitable collectors for their needs and their specific building and which it requires. The well-known energy labels e.g. on refrigerator and washing machines
inform customers concerning the energy consumption of the product and categorize them into different classes. The scale ranges from red for the worst energy class to green for a very low
energy consumption. However the collector yield label informs about the heat yield of the product.
The scale is completely green because solar thermal...
collectors consume practically no energy. With these information the collectors can be compared according to their annual efficiency and the possible savings. The yields of the
collectors date from the Solar Keymark data sheets published by DIN CERTCO . The collector yield label relates to the ErP-Efficiency Label from the European Union. With the collector
yield label, manufacturers call attention to the progressiveness of the solar thermal energy and its clean technology. The use of solar collectors can optimize the energy balance and
enable huge savings to the homeowners.