Solahart SP Series Solar Hot Water System

The SP Series is a roof-mounted, closed-circuit system utilising the new revolutionary Envelope solar collectors.

It’s available in two sizes: 180 litre or 300 litre.

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

The smaller volume of the 181SP makes it ideal for applications where low volumes of solar hot water are required, e.g. small units or retirees.

The larger 302SP system is ideal for families, and features 2 collectors in addition to it’s larger 300 litre capacity.

Zip Egg
Solahart SP series solar hot water system

Reduces Energy Use

Environmental Benefits

Optimal Performance

Trusted Warranty

Key Features

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.

These systems are suitable for harsh water regions. Speak to our team about what product is best suited to your property.


The following warranty applies to the Solahart SP series. Free Heat 10/5/5 warranty, 10 year cylinder and collector supply, 5 year parts supply, 5 year labour; 5/5/5 warranty, 5 year cylinder and collector supply, 5 year parts supply, 5 year labour; applies only when installed as a complete new system. Please contact our team for further information.

L Series hot water
60 Months Interest Free 2 cropped


We have a range of payment & finance options available that make it easier than ever before to stop paying for electricity!


Solahart pioneered the use of solar energy in Australia, beginning with the original plumbing factory in 1901 and then the creation of copper tanks in 1953. 

Now, we’re still leaders in solar and proudly serve the entire Gold Coast and Hinterland region with our solar products from the best brands in solar.

In addition to the strength and experience of Solahart, we’re a Clean Energy Council Approved Solar Retailer.

LG Chem
Tesla Powerwall Logo
Q Cells
Solar Edge