WUNDER ANP 1808
High-performance 1.8 m² selective-surface solar thermal collector designed for residential, commercial, and industrial hot water applications.
TSM 300
TSM 300
Natural thermosyphonic 300 L solar water heater with twin WUNDER ALS 2110 collectors, AISI 316L heat exchanger, and 50 mm PU insulation.
- Natural thermosiphon circulation – Requires no pump or electricity.
- High-performance solar collector – Ensures maximum solar energy absorption.
- Modular and compact design – Facilitates transportation and installation.
- Maintenance-free – A long-lasting system that does not contain a magnesium anode.
- Unpressurized storage tank and pressurized outlet – Ensures a steady flow of hot water.
- Concealed tank for an aesthetic appearance – The integrated tank provides a sleek and modern look.
- Solar Keymark certified and comes with a 5-year system warranty.
Sustainable Hot Water, Zero Electricity Costs
The TSM Solar Water Heater delivers highly efficient, natural circulation-based water heating without requiring electricity. Designed for maximum solar energy absorption, its integrated thermosyphonic system ensures a continuous supply of hot water for homes and businesses.
With modular design for easy transport and installation, a hidden tank behind the panels, and a Solar Keymark certification, the TSM is a maintenance-free, cost-effective, and environmentally friendly solution. Thanks to its unpressurized tank and pressurized water output, you enjoy a steady, reliable flow of hot water every day.
The TSM 300 is a high-efficiency thermosyphonic system that delivers cost-effective, maintenance-free hot water using solar energy alone. With a compact modular design, no need for an external pump, and pressurized water output, it is a reliable, eco-friendly solution for homes and businesses.
Designed for easy installation with modular mounting options for pitched and flat roofs, this system is compact, lightweight, and easy to transport. With no need for a magnesium anode, it is a maintenance-free, long-lasting solution that guarantees high efficiency and energy savings.
The TSM 300 is engineered with advanced technical features, including an Almeeco-Tinox selective coating absorber, low-iron tempered glass glazing, and a reinforced aluminum frame for durability. Its turbulent flow system enhances heat transfer, while the fast-mounting system ensures secure installation on various roof types.
Product information
Capacity
(L/day)
120
Basic data
Weight
kg
48
Dimensions (height/diameter)
mm
950 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
Domestic water exchanger (AISI 316L)
Water volume of the heat exchanger
L
12
Domestic water heat exchanger surface area
m²
3.8
Maximum working pressure
bar
6
Pipe connection
Solar in/out
inch
G 3/4"
Expansion tank connection
inch
G 3/4"
Domestic water in/out
inch
G 3/4"
Tank filling connection
inch
G 3/4"
Electric heater
inch
G 1 1/4"
Product information
Capacity
(L/day)
135
Basic data
Weight
kg
52
Dimensions (height/diameter)
mm
1030 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
Domestic water exchanger (AISI 316L)
Water volume of the heat exchanger
L
12
Domestic water heat exchanger surface area
m²
3.8
Maximum working pressure
bar
6
Pipe connection
Solar in/out
inch
G 3/4"
Expansion tank connection
inch
G 3/4"
Domestic water in/out
inch
G 3/4"
Tank filling connection
inch
G 3/4"
Electric heater
inch
G 1 1/4"
Product information
Capacity
(L/day)
170
Basic data
Weight
kg
60
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
Domestic water exchanger (AISI 316L)
Water volume of the heat exchanger
L
12
Domestic water heat exchanger surface area
m²
3.8
Maximum working pressure
bar
6
Pipe connection
Solar in/out
inch
G 3/4"
Expansion tank connection
inch
G 3/4"
Domestic water in/out
inch
G 3/4"
Tank filling connection
inch
G 3/4"
Electric heater
inch
G 1 1/4"
Product information
Capacity
(L/day)
245
Basic data
Weight
kg
80
Dimensions (height/diameter)
mm
1725 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
Domestic water exchanger (AISI 316L)
Water volume of the heat exchanger
L
12
Domestic water heat exchanger surface area
m²
3.8
Maximum working pressure
bar
6
Pipe connection
Solar in/out
inch
G 3/4"
Expansion tank connection
inch
G 3/4"
Domestic water in/out
inch
G 3/4"
Tank filling connection
inch
G 3/4"
Electric heater
inch
G 1 1/4"
Product information
Capacity
(L/day)
305
Basic data
Weight
kg
100
Dimensions (height/diameter)
mm
2165 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
Domestic water exchanger (AISI 316L)
Water volume of the heat exchanger
L
12.6
Domestic water heat exchanger surface area
m²
4
Maximum working pressure
bar
6
Pipe connection
Solar in/out
inch
G 3/4"
Expansion tank connection
inch
G 3/4"
Domestic water in/out
inch
G 3/4"
Tank filling connection
inch
G 3/4"
Electric heater
inch
G 1 1/4"
Notes
- Collector: Almeeco-Tinox selective coating on highly selective aluminum absorber.
- Low-iron tempered glass glazing with turbulent flow enhancement.
- Tank insulation: 50 mm PU. Outer cylinder: static painted galvanized sheet.
- Unpressurized tank — domestic water is delivered under mains pressure via the AISI 316L heat exchanger.
- Solar Keymark certified with a 5-year system warranty.
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
Thermosiphon System
A thermosiphon system is a solar water heater that circulates water by natural convection alone: water heated in the collector...
Common Questions
Does solar water heating work in winter and on cloudy days?
Yes. Solar collectors harvest diffuse as well as direct radiation, so they preheat water even under overcast skies. In central...
Common Questions
What is the payback period of a solar water heater? (2026)
A solar water heater typically pays for itself in 3–5 years where it replaces electric water heating in sunny markets such as...
FAQ
Solar Thermal FAQ
A solar thermal system uses glazed collectors to heat water directly, typically covering 50–60% of a northern European...
Frequently asked questions
Short, factual answers about the TSM 300.
How does the TSM 300 heat water without a pump or electricity?
The TSM 300 works on the thermosiphon principle: water heated in the collector becomes lighter and rises naturally into the tank above, while cooler water sinks back down. Circulation happens by gravity alone, so the system needs no pump, no controller and no electrical connection.
What equipment does the TSM 300 include?
The system combines twin WUNDER ALS 2110 flat-plate collectors with a storage tank of 245 L capacity using an AISI 316L stainless-steel heat exchanger, delivered as a modular kit for roof installation.
How many people can a 300 L thermosiphon system serve?
Sized at the usual 30-50 litres of hot water per person per day, the TSM 300's 245 L tank covers about 5-8 people's daily demand. In sunnier climates the collector recharges the tank faster, so the same volume stretches further.
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