Solibuffer 50L
A 50-liter buffer tank designed to optimize heating efficiency, extend heat pump lifespan, and ensure
Solibuffer 500L
Solibuffer 500L
Solibuffer 500 is a high-performance 500-liter buffer tank engineered to enhance heating efficiency and protect heat pumps from short cycling, separating the heat pump circuit to reduce wear and ensure stable performance.
- Efficient Heat Management: Solibuffer 500 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.
High-Performance Buffer Tanks for Modern Heating Systems
Solibuffer 500L Hot Water Storage Tank
Storage Tank
Solibuffer 500 is a 500-liter buffer tank designed to optimize heating efficiency, extend heat pump lifespan, and ensure reliable hot water availability. The tank features high-density insulation and a compact, maintenance-free design that integrates seamlessly into various heating applications.
Solibuffer 500 is a high-performance 500-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 and operational costs while ensuring stable performance.
The tank stores excess energy to guarantee 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.
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 robust construction and energy-efficient design, the tank ensures optimal heating performance, longevity, and cost savings. No anode rod maintenance is required.
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.
Product information
Energy efficiency class
-
C
Heat loss
W
54
Tank volume
L
50
Basic data
Weight
kg
20
Dimensions (height/diameter)
mm
570 X 450
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
PU
Insulating thickness
mm
30
Outer cylinder material
-
Static painted galvanized sheet
Pipe connection
Feed water in/out
inch
G 1"
Underfloor heating in/out
inch
G 1"
Electric heater
inch
—
Sensor
inch
—
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
C
Heat loss
W
62
Tank volume
L
100
Basic data
Weight
kg
40
Dimensions (height/diameter)
mm
750 X 540
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
PU
Insulating thickness
mm
50
Outer cylinder material
-
Static painted galvanized sheet
Pipe connection
Feed water in/out
inch
G 1 1/4"
Underfloor heating in/out
inch
G 1 1/4"
Electric heater
inch
G 1 1/4"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
C
Heat loss
W
74
Tank volume
L
170
Basic data
Weight
kg
55
Dimensions (height/diameter)
mm
1200 X 540
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
PU
Insulating thickness
mm
50
Outer cylinder material
-
Static painted galvanized sheet
Pipe connection
Feed water in/out
inch
G 1 1/4"
Underfloor heating in/out
inch
G 1 1/4"
Electric heater
inch
G 1 1/4"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
C
Heat loss
W
85
Tank volume
L
245
Basic data
Weight
kg
73
Dimensions (height/diameter)
mm
1750 X 540
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
PU
Insulating thickness
mm
50
Outer cylinder material
-
Static painted galvanized sheet
Pipe connection
Feed water in/out
inch
G 1 1/4"
Underfloor heating in/out
inch
G 1 1/4"
Electric heater
inch
G 1 1/4"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
D
Heat loss
W
140
Tank volume
L
460
Basic data
Weight
kg
90
Dimensions (height/diameter)
mm
1625 X 750
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
PU
Insulating thickness
mm
50
Outer cylinder material
-
Static painted galvanized sheet
Pipe connection
Feed water in/out
inch
G 2"
Underfloor heating in/out
inch
G 2"
Electric heater
inch
G 2"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
E
Heat loss
W
195
Tank volume
L
850
Basic data
Weight
kg
140
Dimensions (height/diameter)
mm
1850 X 1010
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
Sponge
Insulating thickness
mm
80
Outer cylinder material
-
Artificial leather
Pipe connection
Feed water in/out
inch
G 2"
Underfloor heating in/out
inch
G 2"
Electric heater
inch
G 2"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Product information
Energy efficiency class
-
E
Heat loss
W
220
Tank volume
L
1030
Basic data
Weight
kg
160
Dimensions (height/diameter)
mm
2150 X 1010
Max permissible boiler water temperature
°C
95
Maximum working pressure
bar
6
Insulating material
-
Sponge
Insulating thickness
mm
80
Outer cylinder material
-
Artificial leather
Pipe connection
Feed water in/out
inch
G 2"
Underfloor heating in/out
inch
G 2"
Electric heater
inch
G 2"
Sensor
inch
G 1/2"
Emptying
inch
G 1/2"
Notes
- Tank uses polyurethane insulation (50 mm thick, 40 kg/m³ density) for 100-500 L models.
- Larger models (800 and 1000 L) feature sponge insulation with 18 kg/m³ density.
- Optional electric heater operation available.
- No anode rod maintenance required.
Contact quality@solimpeks.com for local certificates / OEM certificate duplication requests.
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 500L.
What is the Solibuffer 500L buffer tank used for?
The Solibuffer 500L is a buffer tank with a 460-litre water volume 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 500 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 500 L model is the large option in that range.
How much standby heat does the Solibuffer 500L lose?
Standing heat loss is 140 W, which corresponds to ErP energy-efficiency class D. The vessel is insulated with 50 mm of polyurethane foam.
Can I connect a heat pump and underfloor heating directly?
Yes. The tank provides dedicated G 2" tappings for the heat-source feed and G 2" connections for the underfloor-heating circuit, so it drops into standard hydraulic layouts without adapters.
Is the Solibuffer 500L certified?
The Solibuffer 500L 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.
Related Products
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Solibuffer 300L
A 300-liter buffer tank designed to optimize heating efficiency, extend heat pump lifespan, and ensure reliable hot water availability with high-density insulation and compact, maintenance-free design.
Solibuffer 800L
An 800-liter buffer tank designed to optimize heating efficiency, extend heat pump lifespan, and ensure reliable hot water availability with high-density insulation and compact, maintenance-free design.
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A 1000-liter buffer tank designed to optimize heating efficiency, extend heat pump lifespan, and ensure reliable hot water availability with high-density insulation and compact, maintenance-free design.
