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
Envirosun® TS Plus Solar Hot Water System 300 litre 2 Panel Open Circuit
Envirosun® THX Plus Solar Hot Water System 300 litre 2 Panel Closed Circuit Glycol
Envirosun® Active Solar Hot Water System 400 litre 2 Panel
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.
What is an open circuit solar system?
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.
What is a closed circuit solar 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.
What is the difference between open and closed circuit solar?
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.
What is ground mounted solar?
Ground mounted solar systems position the solar collectors on a suitable ground-mounted structure rather than directly on the roof.
Does solar hot water need a booster?
Solar systems generally use a booster to provide additional heating when the available solar energy isn’t sufficient to meet household hot water demand.
What size solar hot water system do I need?
The appropriate system depends on household demand, storage requirements, solar exposure, collector configuration and installation conditions.
Does solar hot water work on cloudy days?
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.
Is solar hot water suitable for my home?
Suitability depends on factors including solar exposure, available collector space, household demand, water conditions and the property’s existing plumbing and installation configuration.











