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  1. Home
  2. /Hot Water
  3. /Solar Hot Water

Solar Hot Water

Designed for Australian conditions, Rinnai Solar Hot Water Systems use advanced solar technology to provide sustainable, cost-effective hot water while reducing household energy consumption and maintaining reliable comfort throughout the year.

Rinnai's solar hot water range consists of two options, the Sunmaster and Prestige, with the key difference being the tank material: Sunmaster features a Vitreous Enamel tank for a durable, cost-effective solution, while Prestige uses a Stainless Steel tank for enhanced corrosion resistance and lower maintenance.

Rinnai Prestige Solar Hot Water Close Coupled Flat Plate Collector (single)

Electric Close Coupled Prestige

Ideal forup to 3 people

  • Tanks manufactured in Australia
  • Stainless Steel tanks
  • Excelsior collectors with European selective surface technology
  • No moving parts
  • Government Rebates available
View product
Rinnai Sunmaster Solar Hot Water Close Coupled Flat Plate Collectors (double - beige)

Electric Close Coupled Sunmaster

Ideal forup to 6 people

  • Designed to withstand extreme winds
  • Carbon steel tank with a vitreous enamel glass lining
  • No electricity needed for water circulation
  • Cyclone frame compatible
  • Government Rebates available
View product
Rinnai Prestige Solar Electric Boosted Hot Water Storage Tank + Evacuated Tubes

Electric Evacuated Tube Prestige

Ideal forup to 4 people

  • Tanks manufactured in Australia
  • Stainless steel / Vitreous enamel tanks
  • Tubes and tank can be installed separately
  • High efficiency collectors suitable for as low as -12°C
  • Government Rebates available
View product
Rinnai Sunmaster Solar Hot Water Storage Tank + Evacuated Tubes (x20)

Electric Evacuated Tube Sunmaster

Ideal forup to 6 people

  • Cost effective Vitreous Enamel tanks
  • Tubes and tank can be installed separately
  • Available with electric boost or gas continuous flow boost
  • High efficiency collectors suitable for temperatures as low as -12°C
  • Government Rebates available
View product
Rinnai Prestige Electric Solar Hot Water Storage Tank + Flat Plate Collectors

Electric Flat Plate Prestige

Ideal forup to 3 people

  • Tanks manufactured in Australia
  • Stainless Steel tanks
  • Collectors and tank can be installed separately
  • Highly efficient Excelsior collectors with European selective surface technology
  • Government Rebates available
View product
Rinnai Sunmaster Flat Plate system

Electric Flat Plate Sunmaster

Ideal forup to 4 people

  • Cost effective Vitreous Enamel tanks
  • Minimal impact on the aesthetics
  • Collectors and tank can be installed separately
  • Government Rebates available
View product
Rinnai Prestige Solar Hot Water Close Coupled Flat Plate Collector (single)

Gas Close Coupled Prestige

Ideal forup to 3 people

  • Tanks manufactured in Australia
  • Stainless Steel tanks
  • Excelsior collectors with European selective surface technology
  • No moving parts
  • Government Rebates available
View product
Rinnai Sunmaster Solar Hot Water Close Coupled Flat Plate Collector (single - grey)

Gas Close Coupled Sunmaster

Ideal forup to 3 people

  • Designed to withstand extreme winds
  • Carbon steel tank with a vitreous enamel glass lining
  • No electricity needed for water circulation
  • Government Rebates available
View product
Rinnai Prestige Solar Electric Boosted Hot Water Storage Tank + Evacuated Tubes

Gas Evacuated Tube Prestige

Ideal forup to 4 people

  • Tanks manufactured in Australia
  • Stainless steel / Vitreous enamel tanks
  • Tubes and tank can be installed separately
  • High efficiency collectors suitable for as low as -12°C
  • Government Rebates available
View product
Rinnai Sunmaster Solar Hot Water Storage Tank + Evacuated Tubes (x20)

Gas Evacuated Tube Sunmaster

Ideal forup to 5 people

  • Cost effective Vitreous Enamel tanks
  • Tubes and tank can be installed separately
  • High efficiency collectors suitable for temperatures as low as -12°C
  • Easy roof installation
  • Government Rebates available
View product
Rinnai Prestige Gas Flat Plate solar hot water

Gas Flat Plate Prestige

Ideal forup to 7 people

  • Tanks manufactured in Australia
  • Stainless Steel tanks
  • Collectors and tank can be installed separately
  • Highly efficient Excelsior collectors with European selective surface technology
  • Government Rebates available
View product
Rinnai Sunmaster Gas Flat Plate solar hot water

Gas Flat Plate Sunmaster

Ideal forup to 5 people

  • Cost effective Vitreous Enamel tanks
  • Minimal impact on the aesthetics
  • Collectors and tank can be installed separately
  • Designed to withstand extreme winds
  • Government Rebates available
View product

Solar Hot Water

Harness the power of the sun for dependable hot water

The Rinnai Solar Hot Water System combines advanced solar technology with reliable boosting to deliver efficient hot water all year round. Designed for Australian conditions, it helps reduce energy consumption while maintaining household comfort.

The main difference between the Sunmaster and Prestige solar hot water range is the tank material. Sunmaster tanks are Vitreous Enamel, providing a durable and cost-effective solution with corrosion protection, while Prestige tanks are Stainless Steel, offering superior corrosion resistance, lower maintenance, and excellent longevity, particularly in harsher water conditions. Both deliver reliable solar hot water performance, with the choice depending on budget, maintenance preferences, and water quality.

Dependable solar performance and energy efficiency

Rinnai Solar Hot Water Systems harness Australia's abundant solar energy to deliver reliable and energy-efficient hot water for homes of all sizes. Advanced solar technology, intelligent gas or electric boosting, and proven durability work together to provide consistent comfort, reduced energy consumption, and lower running costs throughout the year.

Reliable solar performance and year-round comfort

  • Harness the power of the sun

    Efficiently heats water using renewable energy
  • Reliable boosted performance

    Hot water available even during cloudy weather
  • Trusted everyday comfort

    Dependable hot water for households of all sizes

FAQs

Designed to maximise solar energy while maintaining dependable performance, the Rinnai Solar Hot Water range provides efficient hot water and reliable comfort in every season.

Installing a Solar hot water system has great benefits especially when replacing an Electric Storage tank. It can potentially reduce electricity consumption, running costs and environmental impact by ⅔rds.

  • 40% of a typical households electricity is used for heating water.

Therefore a Solar water heater can potentially reduce the overall electricity use by 25%.

Australian electricity is predominantly generated using non renewable and dirty coal fired power stations. As well as electricity they produce carbon dioxide emissions, ash, particles and waste heat, while consuming vast quantities of water and non renewable coal.

Rinnai Solar hot water heaters / systems reduce the need for electricity and are part of many major energy reduction programs. Solar hot water heaters / systems also offset electricity just when it is needed most – Summer – as that is when air conditioners are running, loading up the electricity network.

There are two types of Solar collectors:

Flat Plate collectors: consist of an insulated, tray-style casing topped with a sheet of low-iron solar glass. Beneath the glass lies a solar absorber surface – either a single plate or multiple fins – with a network of water or heat-transfer fluid channels attached. Often referred to as solar panels, flat plate collectors are ideal for non-frost areas and close-coupled solar hot water systems, offering a reliable and efficient way to harness solar energy.

Evacuated Tube collectors: consist of a series of durable borosilicate glass tubes, each containing an inner glass tube with a vacuum layer that provides excellent heat retention. The solar energy absorbed by these tubes is transferred to the hot water within a well-insulated header assembly. These collectors typically come in sets of 20, 25, or 30 tubes and are ideal for frost-prone areas, as they can operate efficiently in temperatures as low as –12°C. Evacuated tube systems must be installed as part of a split solar hot water system.

Benefits

  • Uses solar energy to help reduce water heating costs

  • Reliable and proven solar hot water technology

  • Durable design with minimal moving parts

  • Suitable for a wide range of Australian homes

  • Can significantly reduce reliance on conventional energy sources

  • Available with gas or electric boosting for year-round hot water

Considerations

  • Performance depends on sunlight and weather conditions

  • Requires suitable roof space and solar exposure

  • May require a gas or electric booster during periods of low solar gain

  • Professional installation is required

  • Regular maintenance is recommended to maintain efficiency

  • Roof orientation and shading can impact performance

Benefits

  • Highly efficient solar water heating, even in cooler climates

  • Performs well in low sunlight and cloudy conditions

  • Can achieve higher water temperatures than some other solar hot water systems

  • Energy-efficient, helping reduce water heating costs

  • Modular tube design allows individual tubes to be replaced if required

  • Suitable for households with higher hot water demand

Considerations

  • Higher upfront cost than some traditional hot water systems

  • Requires suitable roof space and solar exposure

  • Often requires a gas or electric booster for periods of low solar gain

  • Professional installation is required

  • Regular maintenance is recommended to maintain performance

  • Roof orientation and shading can affect system efficiency

Benefits

  • Compact, all-in-one design with the tank located on the roof alongside the solar collectors

  • Uses solar energy to help reduce water heating costs

  • Simple system design with fewer components

  • Reliable and efficient for households with good sun exposure

  • Low operating costs when solar energy availability is high

  • Suitable for many residential applications

Considerations

  • Requires adequate roof space and structural support

  • Tank and collectors are visible on the roof

  • Performance depends on sunlight and weather conditions

  • May require a gas or electric booster for consistent hot water year-round

  • Professional installation is required

  • Regular maintenance is recommended to maintain efficiency and performance

Benefits

  • Ensures reliable hot water when solar energy is insufficient

  • Uses solar energy first, helping reduce gas consumption

  • Provides consistent hot water during cloudy weather and high-demand periods

  • Can lower overall water heating costs compared to a standalone gas system

  • Works automatically, with no manual switching required

  • Suitable for households with varying hot water usage

Considerations

  • Requires both solar hot water panels and a gas connection or LPG supply

  • Higher upfront installation cost than a standard water heater

  • Solar performance depends on weather conditions and available sunlight

  • Professional installation and commissioning are required

  • Regular maintenance of both the solar and gas components is recommended

  • Roof suitability and panel placement can affect system performance

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