Solahart 302SP 300ltr Roof Top Solar System


Product Description

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Product Information


Solahart 302SP300lt Roof Top Solar System

302sp front

The Solahart 302SP solar water heater is specifically designed to provide economical service in medium to high solar gain areas, and is suitable for frost prone or harsh water chemistry areas. The 302SP series features the Australian designed Envelope solar collector, offering the latest in styling and all weather durability.


  • Family size
  • 300Capacity (L)
  • 2Collectors
  • 5yrWarranty

Key Features

The SP series features the Australian designed Envelope solar collector, offering the latest in styling and all weather durability, and with five patents pending has been designed to meet or exceed Australian and International Standards in areas of strength and durability.

The SP Series features Solahart’s revolutionary multi-flow collector to extract the maximum amount of energy from the sun. This is used to heat the Hartgard fluid in the collector which rises into the heat exchanger where the heat is transferred to the water inside of the tank. The ceramic lined tank has a protective anode and the SP Free Heat series features additional protection.

The tank is equipped with an electric booster, alternatively an in-line gas booster is available.

How Roof Top Solar Systems Work

Solar Operation

The 302SP solar system has its vitreous enamel lined solar storage tank installed on the roof directly coupled to the solar collectors. In the Closed Circuit Series, heat is absorbed by the collector and passed to the ‘Hartgard’ heat transfer liquid inside the collector. As the temperature of the ‘Hartgard’ increases, the hot fluid rises up through the collector by the Natural Thermosiphon Principle, into the heat exchanger jacket around the potable water storage tank. Here, the heat is transferred to the potable water, cooling the ‘Hartgard’ fluid. The cooler fluid is then forced back down into the collectors through the displacement action of further hot fluid rising up into the heat exchanger jacket.

302sc operation

Product Description

Product Specs

302SP Solar Specifications

Thermosiphon SP Closed Circuit Systems
System Model 302SP
Tank Model SP – 300J
Free Heat – 300F
Storage Capacity 300 litres
Boost Capacity 150 litres
Weight Empty Tank Only  107 kg
Weight Full Tank Only 407 kg
A-Width* Tank Only  2.43 m
Weight Empty System 210 kg
Weight Full System 529 kg
A-Width* System 2.43 m

* For safe access and servicing, a space equal to the tank length should be left on the water connection end of the system and 1m (40in) should be left on the three other sides of the installation. ‡HartStat OTP is optional on these models. Systems (if installed with a HartStat OTP system) can be installed as a solar preheater with an inline Solahart gas booster water heater. Refer to the Solahart gas booster specification sheet for further details on the gas booster.

Collectors SPA2000
Aperture Area 1.8 m2
Length 1996 mm
Width 1043 mm
Height 82 mm
Capacity 3.8 litres
Weight Empty 47 kg
Weight Full 51 kg
Working Pressure
No OTP 80 kPa
With OTP 170 kPa
Absorber Surface SPA2000 Black polyester powder coat
Absorber/Riser Material steel
Number of Risers 35
Frame Material extruded aluminium
Insulation Material (Base) 38 mm glass wool blanket
Glass 3.2 mm tempered low iron
Water Supply
TPR Valve Setting 1000 kPa
ECV* Setting 850 kPa
Maximum Supply Pressure
With ECV 680 kPa
Without ECV 800 kPa
Water Connections
 Cold Rp 3/4
 Hot R 1/2

*Expansion Control Valve.

Electric Boost Specifications
Heating Unit Type Copper sheath immersion element
Supply Voltage 220 V – 250 V
Recovery Rate @ 240 V and Temperature Rise Of:
1.8 8 51 39 31
2.4 10 68 52 41
3.6 15 103 77 62
4.8 20 137 103 83


† Solahart Warranty Details: 5/5/5 warranty; 5 year cylinder and collectors supply, 5 year parts, 5 year labour. 10/5/5 warranty, 10 year cylinder and collectors supply, 5 year parts, 5 year labour.


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