Serving the Illawarra region
Serving the Illawarra region
Illawara Hot Water Products

Solar Hot Water Systems in Illawarra

Solar hot water systems use energy from the sun to heat water for household use. They typically combine solar collectors with a storage tank, allowing solar energy to contribute to your home’s hot water supply.

At Illawarra Hot Water, we can help you compare solar hot water options based on your household requirements, available roof space, solar exposure and preferred system configuration.

Featured Solar Hot Water Systems

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How Do Electric Hot Water Systems Work?

Solar hot water systems use solar collectors to capture energy from sunlight and transfer heat to water.

The heated water is then stored for household use. Depending on the system, the heated water may circulate between the collectors and storage tank through a natural circulation process or with the assistance of a pump.

Open Circuit Solar Hot Water Systems

Open circuit solar systems, also known as direct systems, circulate household water directly through the solar collectors.

As the water passes through the collectors, it is heated by solar energy before returning to the storage system.

Open circuit systems can be suitable where:
  • The local water conditions are appropriate
  • The installation environment is suitable
  • A direct solar circulation system is preferred
  • The property has suitable solar exposure

Closed Circuit Solar Hot Water Systems

Closed circuit solar systems use a separate heat-transfer circuit between the solar collectors and the storage tank.

Instead of household water circulating directly through the collectors, a heat-transfer fluid absorbs solar energy and transfers that heat to the stored water through a heat exchanger.

Closed circuit systems can be suitable where:
  • A separate heat-transfer circuit is preferred
  • Local water conditions need to be considered
  • The installation requires a closed-loop configuration
  • The property has suitable solar exposure

Benefits of Solar Hot Water Systems

Uses Solar Energy

Solar hot water systems use energy from sunlight to help heat your household water.

Renewable Energy Source

Solar energy is a renewable energy source, making solar hot water an option for households looking to use renewable energy for water heating.

Can Reduce Conventional Energy Use

When sufficient solar energy is available, the collectors can provide some or all of the heat required to warm the household’s water.

Stored Hot Water

Solar systems use a storage tank to hold heated water for household use.

Booster Support

A booster provides additional heating when solar energy isn’t sufficient to meet demand.

Flexible Installation Options

Depending on the property, solar collectors may be installed using different configurations, including roof-mounted and ground-mounted options.

Is Solar Hot Water Right for Your Home?

Solar hot water can be a suitable option for homes with good solar exposure and appropriate space for the required collectors.

However, every property is different. Roof design, shading, household demand and existing plumbing can all influence which solar system is suitable.

Consider Your Solar Exposure

Solar collectors need access to sunlight. Trees, buildings, roof structures and other obstacles can affect available solar exposure.

Consider Your Household Demand

The system should be sized according to how much hot water your household uses.

Consider Your Water Conditions

Water quality and local conditions can influence the choice between open and closed circuit solar systems.

Consider Your Existing System

If you’re replacing an existing hot water system, the existing plumbing, storage location and collector installation area should be assessed.

Consider Your Available Space

The system needs suitable space for the collectors and storage tank.

If roof installation isn’t suitable, a ground mounted solar system may be another option where appropriate space is available.

FAQs

How does solar hot water work?

Solar hot water systems use collectors to capture energy from sunlight and transfer heat to water. The heated water is stored in a tank for household use, with a booster providing additional heating when required.

An open circuit solar system circulates household water directly through the solar collectors, where it is heated by solar energy before returning to the storage system.

A closed circuit system uses a separate heat-transfer circuit. A heat-transfer fluid circulates through the collectors and transfers heat to the stored household water through a heat exchanger.

The main difference is how heat is transferred. Open circuit systems circulate household water directly through the collectors, while closed circuit systems use a separate heat-transfer circuit.

Ground mounted solar systems position the solar collectors on a suitable ground-mounted structure rather than directly on the roof.

Solar systems generally use a booster to provide additional heating when the available solar energy isn’t sufficient to meet household hot water demand.

The appropriate system depends on household demand, storage requirements, solar exposure, collector configuration and installation conditions.

Solar collectors can still receive some solar energy during cloudy conditions, although the available solar energy can be lower. The booster can provide additional heating when required.

Suitability depends on factors including solar exposure, available collector space, household demand, water conditions and the property’s existing plumbing and installation configuration.

Choose the Right Hot Water System for Your Home

Different homes have different hot water requirements. The right system depends on factors such as household size, daily hot water usage, available energy sources, installation requirements and running costs.

Electric Hot Water Systems

Electric storage systems are a familiar and practical option for many Australian homes. They are available in a range of capacities to suit different household requirements.

Gas Hot Water Systems

Gas hot water systems can provide reliable hot water and are available as both storage and continuous flow systems.

Solar Hot Water Systems

Solar hot water systems use energy from the sun to heat water and can help reduce reliance on conventional energy sources.

Heat Pump Hot Water Systems

Heat pumps use heat from the surrounding air to heat water efficiently. They can be an excellent option for households looking to improve energy efficiency.

Hot Water System Brands

We supply hot water systems from a range of established manufacturers, giving you access to different system types, capacities, features and price points.

Whether you’re replacing an existing unit or installing a hot water system for a new property, we can help you compare suitable options for your household.

PROFESSIONAL SERVICE

Hot water installation across Illawarra

Whether you’re fitting a hot water system to a new build, upgrading an older unit, or switching fuel types — electric to gas, gas to heat pump, or any other combination — we handle the full installation process from start to finish.

All installations are carried out by licensed professionals across Wollongong, Shellharbour, Kiama, Nowra and surrounding suburbs.

FAST & RELIABLE

Hot water repairs across Illawarra

When your hot water stops working, you want it fixed — not a sales pitch. Our team diagnoses the problem first and gives you a clear explanation of what’s wrong and what it’ll cost to fix before starting any work.

We repair all system types — electric, gas, continuous flow, heat pump and solar — across Wollongong, Shellharbour, Kiama, Nowra and surrounding areas.

OUT WITH THE OLD

Hot water system replacement Illawarra

If your hot water system is beyond repair, losing efficiency, or you simply want to upgrade to a newer, more energy-efficient model, we handle the complete replacement process. We remove your old unit, deliver and install the new system, and make sure everything is connected, tested and running before we leave.

Like-for-like swaps or full upgrades — electric to heat pump, gas to continuous flow, or any other combination.

Hot Water Services Across the Illawarra

Illawarra Hot Water provides hot water system solutions for homes and properties throughout the Illawarra region.

Our services include hot water system installation, replacement, repairs and system advice across the local area.

Whether you’re looking for a new system, replacing an existing unit or need help with a hot water problem, our team can help you explore your options.

Need hot water fast?

Shop online or call for same day service across Illawarra and surrounding areas

Supply & Installation Orders

To order supply and installation, please contact our team:

Please note: an additional $185 charge will apply if a tempering valve is required.