Solibuffer 50L Hot Water Storage Tank

Name: Solibuffer 50L
Brand: SOLIMPEKS

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Solibuffer 50L

High-performance 50-liter buffer tank engineered to enhance heating efficiency and protect heat pumps from short cycling.

Efficient Heat Management: Solibuffer 50 ensures optimal heat distribution and storage, reducing energy waste and improving system efficiency.
Heat Pump Protection: Safeguards your heat pump from short cycling, extending its lifespan and maintaining energy efficiency.
Quick Response Times: Enhances heating system performance, ensuring rapid warmth when needed.
Versatile Applications: Ideal for radiant floor heating and small-scale residential or specialized heating systems.
Low Maintenance: Designed with high-quality insulation and no anode rod, requiring minimal upkeep.

Solibuffer 50 L

Solibuffer 100L Hot Water Storage Tank

The Solibuffer 100 is a high-performance 100-liter buffer tank engineered to enhance heating efficiency and protect heat pumps from short cycling. By separating the heat pump circuit and increasing system water volume, it reduces wear, operational costs, and ensures stable performance.

Designed to store excess energy, it guarantees a steady hot water supply, making it ideal for radiant floor heating and space heating systems. It also supports defrost cycles, improving efficiency and ensuring faster system response for optimal comfort.

To minimize heat loss, the 100–500 L models feature 50 mm thick, 40 kg/m³ polyurethane insulation, while 800 and 1000 L models use 18 kg/m³ sponge insulation. With a compact, maintenance-free design, Solibuffer is easy to install and requires no anode rod. Available in 50–1000 L capacities, it also offers an optional electric heater.

Your All-in-One Heating Solution

Solibuffer is a buffer tank expertly designed to seamlessly integrate into your space heating circuit, enhancing the efficiency and longevity of your heating system. By increasing the water volume within the system, Solibuffer serves many crucial purposes.

Customers 25M+

Countries with Service 96+

Warranty 5 Years

Capacity 50

Product Overview

Solibuffer Series

High-performance 50-liter buffer tank engineered to enhance heating efficiency and protect heat pumps from short cycling.

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Understand the technology

Explainers from our Knowledge Hub on how this technology works.

Glossary Buffer Tank A buffer tank is an insulated water storage vessel installed between a heat generator and the heating circuit. It stores... Common Questions How many litres of buffer per kW of heat pump? Sizing rules Size a heat pump buffer tank at 20–50 litres per kW of heating capacity for radiator and zoned systems, 12–20 L/kW for open... Common Questions Do I need a buffer tank with a heat pump? Most heat pump installations benefit from a buffer tank, and systems with zoned circuits, low water volume or cold-climate... Glossary Stratification (Thermal Layering) Stratification is the natural layering of water in a storage tank by temperature: hot water, being less dense, sits at the top...

Frequently asked questions

Short, factual answers about the Solibuffer 50L.

What is the Solibuffer 50L buffer tank used for?

The Solibuffer 50L is a 50-litre buffer tank installed between the heat source — typically a heat pump or boiler — and the heating circuit. The added water volume reduces short cycling, protects the compressor and smooths heat delivery to radiators or underfloor heating. It is rated for 6 bar maximum working pressure and boiler water temperatures up to 95 °C.

Which system size suits a 50 L buffer tank?

Buffer volume is selected from the heat generator's output and the system's minimum-flow requirement, so follow the volume specified by your installer or heat-pump manual. The Solibuffer range spans 50 to 1,000 litres — the 50 L model is the compact option in that range.

How much standby heat does the Solibuffer 50L lose?

Standing heat loss is 54 W, which corresponds to ErP energy-efficiency class C. The vessel is insulated with 30 mm of polyurethane foam.

Can I connect a heat pump and underfloor heating directly?

Yes. The tank provides dedicated G 1" tappings for the heat-source feed and G 1" connections for the underfloor-heating circuit, so it drops into standard hydraulic layouts without adapters.

Is the Solibuffer 50L certified?

The Solibuffer 50L is manufactured under Solimpeks' certified ISO 9001 (quality), ISO 45001 (occupational safety) and ISO 50001 (energy management) management systems. The certificate documents are displayed in the Certificates section of this page.