PlexiSun™ brings architectural aesthetics & multiple paybacks to solar heating.
Architecturally inspired, PlexiSun™ brings fresh thinking and aesthetics to the solar hot water category. It’s a new approach that has been developed and tested to a Minimum Viable Product, ready for market, and is without rival in its relevance to two major global categories - the US$24B water heating market, and the US$140B roofing market.
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Heating performance has been validated for 6 years at a commercial pilot in Australia, confirming a MVP solar hot water product suitable for users in lower regulation sunbelt zones where energy infrastructure can be unreliable, and water heating is a major cost of day-to-day operations.
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The MVP is modular in design, scalable for end user requirements, and can be assembled in-market.
Architectural options + Payback on heating + Payback on cooling + Payback on lighting + Payback on construction costs
How it works
The PlexiSun™ solar heating advantage comes from our patented application of infra-red reflection off a translucent parabolic surface. This provides an aesthetic structure that reflects the sun’s energy away, in the process reflecting onto heat generating surfaces not facing the sun. Safe daylighting into the area below also provides internal cooling benefits.
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An additional patented mounting system joins and compress the PlexiSun™ roof panel rafters together, forming seamless joins and weather seals.​ This labour saving installation system requires a single bolt onto the purlins of a pre-constructed subframe.
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PlexiSun™ patents are covered by a Registered Brandmark in multiple international markets.
US PATENT No. US 8,333,185 B1
“Solar Fluid Heater and Applications for the same"
US PATENT No. US 11,796,224 B2
“Solar Fluid Heater Installation System”
Patented technology + Building integrated construction + Registered Trademark = Unique business opportunity
One product for a global market
During the development of PlexiSun™ we have witnessed increased awareness of the environmental impact of current heat processes, and the financial impact increased heating prices have had in all markets.
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Global events have highlighted the vulnerability of supply chains, and the effects on industry and productivity.​
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The PlexiSun™ product is modular solution that can be assembled in any market from PlexiSun™ exclusive parts supply, offering local business and employment opportunities.
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Materials are 100% recyclable with acrylic sheeting from a leading global EcoVadis Gold Status manufacturer. There are no landfill or end of life concerns with PlexiSun™.
Modular construction + Circular manufacturing + Local assembly = In-market business and employment opportunities
Craft Brewery pilot, Brisbane, Australia
For 6 years the PlexiSun™ pilot at the Ballistic Beer Company in Brisbane Australia has been pumping large volumes of solar hot water to brew award winning beers, while reducing lighting costs in a previously dark part of the brewery, and lowering the temperature inside building.
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The 52sqm (560sqft) roof has stainless steel heating filaments and has reached up to 110C (230F). Energy data collected from the 52sqm roof values the kWh generated at AU$6010 per annum in 2025 rates.
kWh generated per day.......................60.51 (206,460 Btu)
Calendar year kWh generated per m2...428.06 (1,460,601 Btu)
Calendar year mWh generated.............22.0878 (75,951,270 Btu)
MVP efficiency +15% due to Design & Management refinement from pilot.
PlexiSun™ MVP for Sunbelt Zones
Mainland USA Sunbelt Zones are major industry regions, with categories like food production and tourism who have mandatory hot water requirements, but have lower regulatory requirements. The USA territorial Sunbelt Zones are often remote, subject to extreme weather events, and with unreliable energy infrastructure. These regions have hot water requirements for hygiene, medical & personnel accommodation.
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In regions like Sub-Saharan Africa, where electricity is expensive and energy infrastructure often unreliable, local industry categories rely on hot water as a requirement of day to day operations. These markets can be challenging for manufacturing often relying on imported materials & parts.
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The PlexiSun™ MVP has been developed to be supplied as parts for local workforce assembly in these regions.
Solar Hot water for Food Production + Worker Accomodation + Hospitality & Tourism + Defence, Medical & Disaster Rebuilds
To "electrify everything", there simply must be enough electricity to do so. Heating is the most costly and inefficient use of electricity (often produced from highly polluting generation), so using the free energy from the sun to offset electricity for heating just makes good economic and environmental sense.
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Solar energy stored and managed on-site also means that energy cost savings directly benefit the businesses and communities where the energy is generated.
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When Solar heat and Solar PV are stored together, solar becomes a more complete solution in decarbonising the planet, and the quest to "Electrify Everything" will be faster, cleaner, and cheaper for end users.
Getting Solar heating and Solar PV working together.
PlexiSun™ & PV for off-grid Defence and Humanitarian Aid facilities
Solar heating + Solar PV + Storage = Energy generated and used onsite + Reduced grid reliance
The PlexiSun story
From an idea built on the living room floor, to a multi-patented renewable energy alternative for energy efficient buildings today, and tomorrow.
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PlexiSun™ origins go back to a grassroots solution to a lack of hot water on a piece of land at a rural New Zealand surf beach. You really need hot water after a winter surf in New Zealand.​
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The resulting solar shower went on to win the Supreme Award at a New Zealand Design Challenge, attracting international enquiries and kick starting the journey to commercialise.​​
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We have undertaken USA market research, collaborated with industry experts and remote Pacific Island communities about the energy & climate challenges they face, presented to European Climate organisations, and assembled panels in Africa for testing. In 2017 a group of professional Aussie investors stepped up to support the installation of a PlexiSun™ pilot at a Craft Brewery in Brisbane where it is still delivering free hot water 6 years later.
Real world problems + Grassroots thinking = Real world solutions