ROTEX Solaris - Solar energy for heating and hot water

Content Solar Einleitung 04
ROTEX Solaris is an unpressurised and direct Drain-Back solar system.

It is based on a storage tank concept which is fundamentally different from usual systems. As a result of its special structure, the system is virtually maintenance-free and fail-safe.

ROTEX Solaris uses the free power from the sun for water heating and effectively supports the heating system.

ROTEX Solaris

  • Unpressurised and direct Drain-Back solar system
  • Solar energy for hot water and heating
  • High performing flat solar panels
  • Highly effective stratified storage tank
  • Without anti-freeze agents
  • Optimum water hygiene

Solar heat - Free energy in the right place

Content Solar Kol Sonne 11
At its peak, 80% of solar energy can be converted into usable heat. In conjunction with the quick direct storage of the heat in the ROTEX Sanicube Solaris hot water storage tank, the enormously high thermal efficiency of the ROTEX Solaris flat solar panels guarantees a high energy yield even with relatively short solar radiation. It was against the background of these requirements that the ROTEX Solaris was developed and a completely innovative solar system created. ROTEX Solaris uses solar energy for water heating and effectively supports heating. If the solar heat is not consumed immediately, the ROTEX Sanicube solar storage tank can store large volumes of solar heat and it is possible to use the heat for hot water or heating hours later or even the next day.
  • Solar energy use for hot water and heating support
  • Maximum energy use through an optimised complete system
  • High/performance flat solar panels (flexible use through 3 sizes)
  • Variable assembly either on or in the roof or on stands on flat roofs
  • High storage tank capacity and very low storage tank losses
  • Optimum temperature stratification in the storage tank increases solar use
  • Doubly environmentally friendly by not having to use anti-freeze agents and by avoiding the use of materials which are harmful to the environment
  • Easy to incorporate in existing heating and hot water systems
  • Solar storage tank optimum for water hygiene (tested by the Hygiene Institute in Tübingen University)
  • Storage tank and solar system maintenance-free
  • Fail-safe because no expansion tank or safety valve are required
  • Optimally assessed by the German energy saving ordinance (EnEV)
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Condensing + Solar - The ideal combination

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Content Oel A1undSolar 09.jpg,Content Gas mit Solar 09
Reduce your ongoing energy costs to a low level in the long-term. With ROTEX Solaris you use free solar energy for heating and hot water. The consumption of additionally required fossil fuel is reduced to a minimum by using a ROTEX condensing boiler for oil or gas.

Oil

ROTEX A1 oil condensing boiler, the condensing specialist with a 10-year warranty against severe corrosion.

Gas

ROTEX GasSolarUnit, gas condensing boiler and solar storage tank in the one unit.
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The power of the sun without any diversions

Content Solar Sonne Tag 04.jpg,Content Wolke Nacht 04
Content Solar Sonne Tag 04.jpg,Content Wolke Nacht 04
ROTEX Solaris is based on a storage tank concept which is fundamentally different from conventional systems. The storage tank water is supplied directly and without heat exchanger to the solar panels, heated and then stratified into the storage tank. The heat is not stored in the domestic water, as is more often than not the case, but in the separate unpressurised storage tank water. This ensures that the efficiency of the solar panels and the overall use of the system is again considerably increased. Since the system is unpressurised, components which would otherwise be required are not necessary, such as the expansion tank, pressure relief valve, pressure gauge and heat exchanger. Not only does this reduce the cost of the initial investment, it also increases operational safety.

The Solaris just-in-time principle

The Solaris solar panels are only filled if there is enough heat from the sun and if the storage tank system can absorb heat. In this case, both pumps on the regulation and pump unit (RPS) switch on quickly and fill the solar panels with storage tank water. After the filling process, which takes less than a minute, the pump switches off and the water circulation is maintained by the remaining pump.
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Sanicube Solaris - The perfect stratified storage tank

Content Gas GSU Schnitt 18
The storage tank container in the ROTEX Sanicube Solaris is a solid plastic construction with a double shell. The space between the inside and outside container has excellent foam heat insulation. In the inside, depending on the design, there are two to four heat exchangers made of stainless steel corrugated pipe. The 500 litre tank is filled up once with unpressurised tap water without additives. The Sanicube Solaris is divided into two main areas: The top one, always the warm part - the process water area and the lower colder part - the solar area.

The right temperature in each stratification

In thermal solar systems it is important that the heat storage tank has the best possible pronounced temperature stratification behaviour. Temperature stratification is therefore possible since hot water is lighter than cold water and rises upwards. In the top part of the storage tank the process water is heated. This is where high temperatures are in control to ensure that there is always enough hot water available. The water is stored in the lower part of the storage tank and is supplied to solar operation directly to the solar panels. The colder the water which flows through the solar panels is the more efficiently they operate.

This is how we take everything out

The cold fresh water is fed into the deepest point of the storage tank container. From there, it is taken upwards to the stainless steel corrugated pipe acting as a heat exchanger and heated according to the instantaneous water heater principle. This ensures that the temperature in the lowest part of the storage tank from where the solar panels are supplied with water is cooled to the maximum. This type of water conduction generates a stable, strong and definite temperature stratification in the storage tank. The low heat conductivity of the plastic container wall favours and stabilises the stratification behaviour. Unlike metal storage tanks, practically no heat is conducted downwards in the tank wall.
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Water hygiene is our principle

As a result of its structure, the ROTEX Sanicube Solaris is optimal from a water hygiene perspective, since the water to be heated is passed through to a pipe system and heated. The water content of the domestic water heat exchanger is currently 19/24 litres and is therefore only a fraction of the water quantities usually found in storage tanks. Areas with little current or which are not heated all the way through on the hot water side do not even come into question in the ROTEX Sanicube Solaris.

Domestic water is exclusively located in one pipe so that deposits of sludge, rust or other sediments, as can occur in containers with a large volume, are not possible. The water stored first is also taken out first (First-in-first-out principle).

The outstanding water hygiene advantages of this type of hot water storage tank were confirmed by extensive research carried out by the hygiene institute of Tübingen university.

Keyword legionella

Legionella Bacteria

There are approx. 35 types of legionella. At least 17 of these are pathogenic. The most common consequences are: Pontiac fever: symptoms similar to flu which improve after a few days. Legionnaire's disease: severe bacterial lung infection. The infection is fatal in 15 to 20 percent of cases.
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Always ready - The Solaris solar panel

Content Solar Kollektoren 04
The Solaris high-performance solar panels convert almost all of the shortwave solar radiation into heat through their highly selective coating. As soon as the temperature of the water contained in the solar panel in the solar zone exceeds a predetermined value, the digital Solaris control starts the charging process.

Suitable for any roof

Since all buildings are different, there are various installation options for fitting the ROTEX flat solar panels onto the roof. The solar panels can be fitted onto the tiles (on-roof), into the roof (in-roof) or also with a special substructure onto a flat roof. The three different solar panel sizes mean there is flexibility in adapting to roof characteristics.
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Technical data

Solaris
Flat solar panels
 V 21 P
 V 26 P
 H 26 P
Dimension
LxWxH mm		 2000x1006x85 2000x1300x85 1300x2000x85
Gross surface area 2.01m2 2.60m2 2.60m2
Aperture surface area 1.79m2 2.35m2 2.35m2
Absorber surface area 1.80m2 2.36m2 2.36m2
Weight 35 kg 42 kg 42 kg
Water content 1.3 Litre 1.7 Litre 2.1 Litre
On-roof assembly yes yes yes
In-roof assembly yes yes no
Flat-roof assembly no yes yes
 Sanicube Solaris INOX SCS 538/16/0 SCS 538/16/16 SCS 538/0/0
Basic data
Total storage capacity Litre 500 500 500
Empty weight kg 87 93 81
Total filled weight kg 587 593 581
Length cm 79 79 79
Width cm 79 79 79
Height cm 159 159 159
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