Storage water tanks, electronic anodes, solar panels, and accessories

Arcobaleno solar panels, in their different configurations, are designed to be installed in closed solar systems to produce hot water for potable use, heating integration, and swimming pool heating.

Emmeti water storage tanks come in various forms, including enameled for potable water and black painted for storing hot water for the heating system. An electronic anode is standard on all Emmeti potable water tanks.

What is the difference between an enameled and an inorganic enameled water storage tank?

The difference is the treatment of the inner surface of the tank. The enameled version can withstand 70 °C temperatures constantly.
The inorganic enameled version can reach higher temperatures, up to 95°C, which can be reached in solar applications or with a wood boiler.
The details of the treatments are given in the Emmeti catalogs.

Are the Comfort accumulation tanks supplied with the insulation assembled?

Comfort accumulation tanks, up to 500 liters, are insulated with rigid polyurethane. In the case of bigger sizes, the insulation is supplied separately and has to be assembled by the installer. Anyway, the insulation is included in the price indicated in the price list.

Why are Emmeti water tanks equipped with an energy label?

Emmeti hot water tanks have been equipped with an energy label since September 26th, 2015, according to 812/2013 EU rules, in the sizes indicated by the standard.
If some sizes are not equipped with an energy label, they are not covered by the EU 812/2013 standard.

What is the difference between a magnesium anode and an electronic anode?

The magnesium anode is a component that reduces corrosion in the event of imperfect coating of the internal surface of the accumulation water tank.
Therefore, it has to be checked and controlled regularly. On the other hand, the
 electronic anode creates cathodic protection, the green light guarantees its operation, and it is unnecessary to check or replace it.

What are the led lights on the anode controller showing?

The led lights show the correct functioning of the electronic anode. If the electronic anode is correctly installed, the green light must be on.

Can I heat domestic hot water with an electric element instead of a heat pump?

A suitably sized electric element can heat DHW, but it has an efficiency equal to 1, i.e., it consumes 1kW and transmits 1kW to the water. On the other hand, the heat pump can achieve an efficiency of about 5, so it consumes 1 kW but transmits up to 5 to the water. A heat element, therefore, can be used in specific applications, but where possible, it is more convenient to use a heat pump.

Is it necessary to use glycol antifreeze even if the panel is installed in an area where the temperature never drops below 0°C?

Absolutely yes, it is possible to have ice inside the solar panel even if the outside air temperature is higher than 0°C, in the case of the clear sky during the night.

There is air inside the solar circuit; where is it coming from?

Suppose there is air inside the solar system. In that case, it may be due to an improper startup of the system, or it may come from electrolytic galvanic corrosion caused by different metals in contact with water in the same system. In the second case, you can use a specific anti-freeze additive that protects metal surfaces.

Is it necessary to install an air vent and an automatic feeder in a solar installation?

Installing a fan automatic water feeder may cause problems in a solar installation, considering that the antifreeze glycol goes away if there is a leak.
The new water going in would be pure. The automatic air vent is essential to eliminate air, which limits water circulation and the solar system's efficiency.
The installation of an air eliminator in the technical room is suggested, considering that the air vent on the top is not visible, and leakages can occur.