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Full-plate absorber
A 0.40mm selective aluminium-titanium sheet across the whole collector, on Ø22 & Ø8 copper risers with laser welding. On top, 3.2mm tempered safety glass that stands up to hail and heavy rain.
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Dual-energy solar water heater
Mastersol ECO Solar Water Heater 300 lt, Selective Collectors 4.0 m², Dual EnergyCode: MSG300-4
A selective aluminium-titanium collector and a Duro Glass enamelled tank, on a closed circuit that withstands −47°C. With a 3.5kw electric element as a second source.
Mastersol ECO MSG200–300 models
- Delivery across GreeceBy courier or freight, depending on size. The cost is shown at checkout, once you enter an address.
- Pick-up in Patras171 Ag. Ioanni Pratsika St · Mon–Fri 08:30–17:00, Sat 09:00–14:00
- Installation by a partnerPartner installers across Greece.
- 5 years cylinder (10 with the extension kit), 15 years collectors warranty from ClimaventisSpare parts and service directly from us.
Installer or retailer? Log in for trade prices
Description
Hot water from the sun, all year round.
The Mastersol ECO is a closed-circuit solar water heater. The collector and the jacket around the tank are filled with antifreeze, which carries the sun's heat to your hot water. That is why the system withstands frost down to −47°C.
The tank is made of 2.5mm European steel, with Bayer Duro Glass enamel fired at 850°C inside, a magnesium anode against corrosion and 5cm of rigid polyurethane insulation. Every tank is pressure-tested at 15bar.
The collector has a full-plate selective aluminium-titanium absorber, copper risers and 3.2mm tempered safety glass that stands up to hail and heavy rain.
It is dual energy: the sun heats the water and, when needed, the 3.5kw electric element.
This range covers the 200 and 300-litre models, with two collectors from 3 to 5.5 m². For smaller households there are the 100 to 160-litre ECO models, and for a connection to central heating the triple-energy version.
Selective collectorFull-plate aluminium-titanium absorber, copper risers.
Duro Glass enamelFired at 850°C, for hygienic water.
Closed circuitWith antifreeze, down to −47°C.
Tested at 15barWorking pressure up to 10bar.
Sun and electricityA 3.5kw element as a second source.
Made in GreeceA+ energy label, collectors certified to Solar Keymark.
Highlights
What makes the difference.
From the collector absorber to the frame, what every ECO comes with.
Tank with heat-exchange jacket
2.5mm European steel, MAG welded, with Bayer Duro Glass enamel fired at 850°C inside. The 1.5mm steel jacket covers 80% of the tank length. 5cm of rigid polyurethane keeps heat losses to a minimum.
One-piece aluminium frame
A one-piece aluminium frame with a 1.25mm profile, a 0.5mm galvanised steel back and double 4cm mineral wool insulation. 100% neutral silicone.
Closed circuit with antifreeze
The collector and the jacket are filled with antifreeze, so the system withstands frost down to −47°C. On top of the tank are the fill and vent points of the circuit and the seat of its safety valve (1.5-3 bar).
Made in Greece
Mastersol solar water heaters are made in Greece. The heavy-duty brass connections are marked on the tank: hot water outlet and the connection to the collectors.
Galvanised frame
The mounting frame is made of 2mm seamless galvanised steel, in a flat-roof (18kg) or a tiled-roof (20kg) version. You choose it when you order.
Compare the models
Five sizes, one build.
All models share the same Duro Glass tank, the same selective collector and a 3.5kw element. The litres and the collector area change: choose by the number of people and where you live.
| Compare the models | MSG200-3929.36 € | MSG200-41,012.82 € | MSG300-41,190.91 €This model | MSG300-51,302.22 € | MSG300-551,361.19 € |
|---|---|---|---|---|---|
| Tank · collectors | 200 lt · 3.0 m² | 200 lt · 4.0 m² | 300 lt · 4.0 m² | 300 lt · 5.0 m² | 300 lt · 5.5 m² |
| Collector dimensions | 2 collectors, 1.5 × 1.0 m · total width 2.12 m | 2 collectors, 2.0 × 1.0 m · total width 2.12 m | 2 collectors, 2.0 × 1.0 m | 2 collectors, 2.0 × 1.25 m · total width 2.62 m | 2 collectors, 2.0 × 1.36 m · total width 2.84 m |
| Tank length | 128cm | 128cm | 178cm | 178cm | 178cm |
| Tank diameter | 58cm | 58cm | 58cm | 58cm | 58cm |
| Jacket capacity | 9 lt | 9 lt | 18 lt | 18 lt | 18 lt |
| Tank weight | 68kg | 68kg | 100kg | 100kg | 100kg |
| Collector weight | 2 × 26kg | 2 × 34.3kg | 2 × 34.3kg | 2 × 41kg | – |
Manufacturer's data (mastersol.gr). Collector dimensions: height × width. "From" prices include VAT.
Technical specifications
All the numbers, in one table.
| Litres | |
|---|---|
| 300 lt (5-8 users) | |
| Solar Water Heaters | |
| Collector area | 4.0 m² |
| Collector back | 0.5mm galvanised steel sheet |
| Collector dimensions | 2 collectors, 2.0 × 1.0 m |
| Collector efficiency | 95% ±2% |
| Collector frame | Aluminium, one-piece |
| Collector insulation | Double mineral wool 4cm |
| Collector type | Selective aluminium-titanium, full plate |
| Energy Class | A+ |
| Inner tank lining | Duro Glass enamel (Bayer) to DIN 4753-3, fired at 850°C |
| Maximum heat exchanger pressure | 3.2bar |
| Maximum test pressure | 15bar |
| Maximum working pressure | 10bar |
| Outer casing | Pre-painted galvanised steel sheet 0.5mm |
| Riser grid | Copper Ø22 & Ø8 |
| Tank capacity | 300lt |
| Tank connections | Heavy-duty brass |
| Tank diameter | 58cm |
| Tank insulation | Rigid polyurethane 5cm, 48kg/m³, self-extinguishing |
| Tank steel | 2.5mm European steel 1204 V.E., MAG welded |
| Tank type | Closed circuit with heat-exchange jacket |
| Tank · collectors | 300 lt · 4.0 m² |
| Energy sources | Sun and electricity |
| Tank length | 178cm |
| Jacket capacity | 18 lt |
| Tank weight | 100kg |
| Electric heating element | 3.5kw (Ø140 flange, 8 holes) |
| Maximum operating temperature | 95°C |
| Collector glass | 3.2mm tempered safety glass |
| Collector weight | 2 × 34.3kg |
| Mounting frame | 2mm seamless galvanised steel · 18kg (flat roof) or 20kg (tiled roof) |
| Heating | |
| Warranty | 5 years cylinder (10 with the extension kit), 15 years collectors |
Warranty & installation
We are here after you buy.
5 yearson the cylinder, serviced every 2 years
10 yearson the cylinder, with the extension kit and a yearly service
15 yearson the solar collectors
1 yearon the electrical parts
The extension kit is an overheat valve (94°C / 6 bar), a 10 bar closed expansion vessel and an expansion vessel for the closed circuit. The warranty covers parts, not labour or transport, and does not cover the collector glass.
The system must be installed by a licensed plumber. The warranty form is filled in, signed and emailed to Mastersol (info@mastersol.gr), together with proof of each service.
Warranty terms → Warranty form (PDF, in Greek) →By a partner in your area
A partner installer does the site visit, the connection and the first start-up. Ask for a quote together with the product.
Contact us →Sure about the size?
Our engineers calculate your home's heat loss and confirm the choice. The first assessment is free.
Contact us →Before installing
- FrameMade of 2mm seamless galvanised steel, for a flat roof (18kg) or a tiled roof (20kg). You choose it in the product options.
- DimensionsCollectors (height × width): 2 collectors, 2.0 × 1.0 m. Tank: length 178cm, diameter 58cm.
- PlumbingHeavy-duty brass connections. Maximum working pressure: tank 10bar, jacket 3.2bar; maximum temperature 95°C. You choose the assembly materials, with polyethylene or stainless steel pipe, when you order.
- ElectricsElectric element 3.5kw (Ø140 flange, 8 holes). Electrical parts have a 1-year warranty.
- InstallationBy a licensed plumber, with a service receipt. It is a condition of the warranty.
- ServicingEvery 2 years, replace the magnesium anode rod and the safety valves; every year for the 10-year warranty. Every year, check and top up the antifreeze.
- SummerMastersol recommends covering half of the collector area in summer, and all of it when you are away for more than 3 days.
Questions
Ask us before you buy.
Our technicians answer every question, from choosing to installing.
2610 334 389 info@climaventis.grWhich size do I need?
Mastersol sizes its systems for a normal use of 40 litres of hot water at 40°C per person. As a guide: 1 person, 100 litres with 1.5 m² anywhere in Greece. 2 people, 120 litres with 2.0 m² (1.5 m² is enough in southern Greece). 3 people, 120 litres with 2.0 m², or 160 litres with 2.0 m² in northern Greece. 4 people, 160 litres with 2.5 m² (2.0 m² in the south). 5 people, 200 litres with 3 m², or 4 m² in northern Greece. If you are not sure, call us.
What does dual energy mean?
That the water is heated in two ways: by the sun and, when needed, by the 3.5kw electric element. If you want your heating boiler to heat it too, there are triple-energy models.
Does it withstand frost?
Yes. It runs on a closed circuit with antifreeze and withstands temperatures down to −47°C. The antifreeze is checked and topped up every year, depending on the area.
Can it go on a flat roof and on a tiled roof?
Yes. The mounting frame is made of 2mm seamless galvanised steel, in a flat-roof (18kg) or a tiled-roof (20kg) version. You choose it in the product options.
Is there a version with a horizontal collector?
Yes, the ECO Horizontal, from 120 to 200 litres with one collector. With the collector laid horizontally the system is lower and wider; the collector output stays the same.
What warranty does it have?
5 years on the cylinder, serviced every 2 years. 10 years if you also fit an overheat valve (94°C / 6 bar), a 10 bar closed expansion vessel and a closed-circuit expansion vessel, with a yearly service. 15 years on the collectors and 1 year on the electrical parts. The warranty covers parts, not labour or transport.
What servicing does it need?
Every 2 years the magnesium anode rod and the safety valves are replaced, or every year for the 10-year warranty. Every year the antifreeze is checked and topped up. The technician signs the warranty form and gives you a service receipt.
How are delivery and installation done?
The solar water heater ships by carrier throughout Greece; you see the shipping options and cost in the cart. A licensed plumber installs it, which is also a condition of the warranty; we can suggest a partner in your area.
Complete the installation
For the 10-year warranty.
The cylinder warranty becomes 10 years with an overheat valve (94°C / 6 bar), a 10 bar closed expansion vessel and an expansion vessel for the closed circuit, plus a yearly service. Here is the Mastersol closed-circuit expansion vessel.
Mastersol
Mastersol FS1 expansion vessel for a solar closed circuit - 1 litre
Fits your power need
23.73 €
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See also
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Mastersol ECO Solar Water Heater 120 lt, Selective Collector 1.5 m², Dual Energy
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Mastersol ECO Solar Water Heater 160 lt, Selective Collector 2.0 m², Dual Energy
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