EnergyBy - 300L Domestic Hot Water Tank with 2 Heat Exchangers | Solar Ready

Description

This 300-litre domestic hot water tank is an indirectly heated storage tank designed for the production and storage of hot sanitary water. The water inside the tank is heated via two internal heat exchangers (coils), allowing multiple heat sources to be combined efficiently.

On many websites and among installers, this type of domestic hot water tank is also referred to as a stand-alone solar boiler. This is because it is frequently used as the storage vessel in a solar thermal system, combined with solar collectors such as heat pipe collectors or flat plate collectors.

The tank itself is manufactured from high-grade stainless steel RVS316L. The internal heat exchangers are also fully made of stainless steel, ensuring excellent corrosion resistance, long service life and reliable heat transfer.

Working of the 2 heat exchangers

This domestic hot water tank is equipped with two internal heat exchangers:

• Lower heat exchanger
  Typically connected to a solar thermal system using heat pipe or flat plate collectors. Solar energy is transferred directly to the domestic hot water stored in the tank.
• Upper heat exchanger
  Intended for auxiliary heating, for example via a gas boiler or central heating boiler. This ensures a reliable supply of hot water, even during periods with limited solar gain.

Energy-efficient and well insulated

The tank has an energy efficiency class A and a low standing heat loss of approximately 46 watts. Thanks to its high-quality insulation, heat loss is minimised, resulting in lower energy consumption and improved system efficiency.

Optional electric back-up heating

The tank is prepared for the installation of an electric heating element with a capacity of 1500 watts or 2500 watts.
The connection size is 1 inch, making installation of an electric element straightforward. This provides additional flexibility when no external heat source is available.

Key features

• Domestic hot water tank with 304-litre capacity
• Indirectly heated storage tank
• 2 internal heat exchangers (double coil)
• Tank and coils made of stainless steel RVS316L
• Suitable as a stand-alone solar boiler / solar hot water tank
• Connection for solar thermal collectors
• Auxiliary heating via gas or central heating boiler
• Optional electric back-up heating (1500 W / 2500 W)
• Energy efficiency class A – approx. 46 W standing heat loss
• Suitable for residential and small-scale installations
• Diameter: 580mm
• Height: 1827mm

Frequently asked questions about this domestic hot water tank (300 litres)

Is this a hygiene boiler?
No. This is not a hygiene boiler. This product is an indirectly heated domestic hot water storage tank in which the water is stored and heated via internal heat exchangers. In a hygiene boiler, water flows directly through a coil, which is not the case here.

What material is the tank made of?
The tank is manufactured from stainless steel RVS316L, a high-quality stainless steel alloy with excellent resistance to corrosion and temperature fluctuations. The heat exchangers are also made entirely of stainless steel.

Is this domestic hot water tank energy efficient?
Yes. The tank has an energy efficiency rating A and a low standing heat loss of approximately 46 watts, contributing to efficient energy use.

Why is this tank also called a stand-alone solar boiler?
Because this type of domestic hot water tank is often used as the storage vessel in a solar thermal system. When combined with solar collectors, it functions as the solar hot water storage tank, which is why the term “stand-alone solar boiler” is commonly used.

What are the two heat exchangers used for?

• The lower heat exchanger is used for solar collectors.
• The upper heat exchanger is used for auxiliary heating via a gas or central heating boiler.

This ensures a consistent hot water supply, even when solar input is limited.

Can this tank be electrically heated?
Yes. The tank is prepared for an electric heating element of 1500 or 2500 watts, with a 1-inch connection.

What is the difference between a domestic hot water tank and a buffer tank?
A domestic hot water tank stores sanitary hot water for showers, taps and kitchens.

A buffer tank stores heating water for central heating or heat pump systems and does not supply domestic hot water.

Specifications

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