Solahart 302L
The Solahart 302L is designed for medium-sized households. It combines efficient solar water heating with advanced features like the TRV valve and Super Shield Enamel® for long-lasting protection.
Solahart 302L Solar Water Heater: Key Attributes
Why the 302L system is a smart choice
The Solahart 302L is ideal for medium-sized households with 3-4 people, providing a balanced combination of high capacity and energy efficiency. The 300-Litre tank ensures there is enough hot water for daily needs, and its open-circuit thermosiphon system provides reliable performance with minimal maintenance. The system includes a TRV valve for safe operation and Super Shield Enamel® for maximum protection against corrosion, ensuring it lasts for years to come. The L Free Heat Series offers an environmentally-friendly solution with significant energy savings.
Key Features:
- Capacity: 300-Litre tank, ideal for medium households (3-4 people).
- Open Circuit Thermosiphon: Reliable solar-powered water heating with minimal maintenance.
- TRV Valve: Safe pressure management for optimal performance.
- Super Shield Enamel: Enhanced durability with corrosion protection.
- Energy Efficient: Save up to 65% on water heating costs.#
- Reduced CO2 Emissions: Save up to 2.3 tonnes of CO2 annually.#
Warranty:
- 10-year warranty on the collector and tank.*
- 5-year warranty on parts and labour.*
Collectors:
- 2 x L Collectors - Optimal Performance in medium-to-high solar gain areas.
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Specifications
Tank Model - 300L Tank Storage Capacity (litres) 300 Boost Capacity (Electric) (litres) 150 Weight Empty (kilograms) 91 Weight Full (kilograms) 391 A-Width (metre) 2.43 B-Length* (metre) 0.51 Tank Model - 302L System Storage Capacity (litres) 300 Boost Capacity (Electric) (litres) 150 Weight Empty (kilograms) 156 Weight Full (kilograms) 460 A-Width (metre) 2.48 B-Length* (metre) 2.53 L Collectors Aperture (heating) Area (m2) 1.87 Length (mm) 1943 Width (mm) 1027 Height (mm) 83 Capacity (litres) 1.2 Weight Empty (kg) 29 Weight Full (kg) 32 Working Pressure 1000 kPa
145 psiAbsorber Surface Black polyester powder coat Absorber Material aluminium Riser Material copper tube Tray Material 0.7 mm aluminium Insulation Material - Base 38 mm polyester blanket Glass 3.2 mm tempered low iron glass -
How it works
How Roof Top Solar Systems Work Solar Operation
The 302L solar system has its vitreous enamel lined solar storage tank installed on the roof directly coupled to the solar collectors. It works on the simple scientific fact that hot water rises. As the sun heats the water in the solar collectors, the increase in temperature causes the water to rise through an insulated copper pipe into the storage tank. Copper is used for the risers for its high thermal conductivity ensuring the maximum amount of heat energy is passed to the water. This allows cooler water from the solar storage tank to flow into the solar collectors to be heated by the sun's energy. This process continues while solar energy is available.
The L Series has a ceramic lined tank with a protective sacrificial anode. The L Free Heat features additional anode protection. L and L Free Heat systems can be installed with an optional TRV over temperature protection system to prevent over performance during periods of higher solar radiation and lower hot water draw off.
Orientation of Solar Collectors
To help maximise system performance, solar collectors should be installed with an optimum orientation facing true north (in the southern hemisphere) or true south (in the northern hemisphere). Always check for true north or true south using a compass or other suitable device.
To help maximise system performance, solar collectors should be installed with an optimum inclination. This is equal to 90% to 100% of the local latitude angle when collectors are oriented within 60° of true north or true south, and between 10° and 20° if the collectors are oriented between 60° and 90° from the optimum orientation. Generally, improved summer performance is obtained from an angle of inclination less than the optimum angle and improved winter performance is obtained by an angle of inclination greater than the optimum angle. If the angle of inclination varies by 20° from the optimum angle, the solar collectors will receive about 10% less total annual solar radiation.
Frost/Freeze Protection
An Open Circuit system does not have freeze protection and is not suitable for installation in areas prone to freeze conditions. Freeze conditions occur below 5°C (41°F). This system has NO WARRANTY for freeze damage. In areas that are prone to frost / freezing, a Closed Circuit system should be used.
Solar Boosting
In-Tank Boosting
An isolating switch is installed in the electrical meter box for an electrically in-tank boosted model. This should be left switched on to allow the booster heating unit to operate if required. The booster heating unit is for heating the water at times of low solar energy gain, such as during very cloudy or rainy weather, or during the colder months. The booster heating unit will only activate if heating is required and power is available from the switchboard. When the water is below the thermostat setting, the booster heating unit will turn on and heat the water. The booster heating unit will automatically turn off when the temperature of the water reaches the thermostat setting. If the water temperature drops below the setting again the booster will re-activate.
In-Series Gas Boosting
An in-series gas booster (also known as a continuous flow gas booster) can be installed between the solar water heater and the hot outlets in the house. This booster should be permanently active. The booster senses the temperature of the water passing through it: if the water temperature is above its temperature setting it does nothing; if below it will automatically heat the water up to the preset outlet temperature setting. This device ensures hot water delivery for a variety of hot water demands without the need for user intervention while enabling maximum solar energy contribution to the water heating. For more information on this booster, consult the owner’s manual for the product.
Over-Temperature Protection System
The Open Circuit Series systems may be installed with a ‘TRV’ thermosiphon restrictor located between the cold inlet of the tank and the cold inlet of the collectors. This valve restricts the flow through the collectors when the tank has reached a sufficiently high temperature.
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