active split solar hot water system
AS
system
ENVIROSUN Active Split Solar Hot Water Heater
Envirosun® AS active split solar hot water systems
Australian made solar hot water cylinders with storage tank sizes to suit all homes and climates
— 100% australian owned
Queensland
New South Wales
Victoria
Western Australia
South Australia
Northern Territory
ACT
Tasmainia
The benefits of using the sun’s energy to heat water has been around for many decades, Envirosun® have developed the most advanced split solar hot water systems in Australia. The Envirosun® AS solar hot water range is designed exclusively for the vast Australian climate and varying conditions. Envirosun® AS solar hot water heaters are in a class of it’s own when it comes to performance, reliability and life expectancy. From the Australian made solar hot water storage tanks, to the best European control and pumping systems along with the extremely high solar absorption panels made from the absolute pinnacle of solid materials copper, aluminium and brass, Australian Valve Group safety and control valves, when all this is applied together gives the Envirosun® AS range of solar hot water systems the reputation it clearly deserves.
Add the generous warranties offered and the fact that Envirosun® is 100% Australian owned, makes it a clear smart decision to install an Envirosun® solar hot water system.
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Very happy with system
Very happy with the system and the gas savings. Excellent job on the install and were easy to work with.
Andrew F
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Absolute joy
I kept checking my electric booster in case I left it on... hot water even on cloudy days. Absolute gem!!! Highly recommend!
Mike (Perth)
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Lives up to its rated performance
We had Solarhart and Edwards stainless steel systems before and can confirm that the current Envirosun system excels at the task of providing us hot water, even on shady and overcast/rainy days.
Luke (Perth)
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Best service from Envirosun
Put in a Envirosun solar hot water system 7 months ago now. I have not used booster at all and power bill is $147 and $153 cheaper.
Lillie Warner (Queensland)
Below are technical details about the Envirosun® AS Active Split solar hot water heaters…
The AS solar storage tank
Australian Made
Anode protection
Enamel-lined mild steel
Our storage cylinders are built to last
Envirosun® AS tanks are fabricated from high-strength materials especially suited to operating in high-temperature, high-pressure applications which can otherwise be very corrosive.
Our hot water tanks stay hotter for longer
Envirosun® cylinders are encapsulated in a pressure-injected, high-density polyurethane thermal insulation. Compared with archaic insulation systems using straw, wool or fibreglass, polyurethane retains more heat and does so for far longer – and it has the added advantage of imparting structural rigidity to the assembled vessel. To find out how polyurethane is used to create a superior thermal barrier, read: our insulation.
Our storage cylinders deliver hot water faster
Our storage cylinders deliver hot water faster our solar hot water systems are rated to operate high water pressures that are near to that of the mains water supply. Unlike low pressure hot-water systems, you can enjoy plenty of hot-water from more than one outlet at the same time. To understand how our system of pressure control valves works to limit but maintain hot-water system pressure, read: our pressure valves.
Envirosun® systems use this mix of optimisation and over-temperature protection functions to maximise energy savings and minimise heat stresses.
The brains behind Envirosun® AS
Highest quality German made
Inside the Envirosun® control panel is the most advanced Resol Deltasol controller
This Envirosun® multiprocessor controller is the brains that makes the solar work and it also displays everything that is going on its LED screen
Tells you the temperature is inside solar panel
The temperature inside your Envirosun storage tank
Lets you know if there is any problem with either temperature sensor
Displays a Green and Red light when it is sending power to the pump
Only the highest quality German made solar hot water controllers are used in Envirosun AS solar hot water systems.
The hard work is trusted to Salmson
European made
Solid brass
Stainless steel impellor housings
Envirosun® solar hot water is pumped by the European-made Salmson solar pump.
Envirosun® trust all the hard work of circulating the hot water through the solar panels to these proven little beauties.
European made Salmson solar pumps are used in Envirosun AS solars
The Salmson solar hot water pumps are made with solid brass
They have stainless steel impellor housings
All AS Envirosun solar's also come with a easy to see solar flow meter
Made in France to the highest quality and engineering, they are also used by most of the major brands in Australia.
Safety and control valves
Valves by Australian Valve Group
All of the Envirosun's AS solar hot water systems come with all valves needed for installation.
AVG solar tempering valve supplied
AVG cold water expansion valve supplied
AVG NRI/PRV valve is supplied
Brass fittings and connections are also supplied
Choosing the right valves to protect our solar hot water systems and your family is a very important job and we have entrusted that job to AVG.
Backup for bad weather
Running out of hot water is never a issue with electric and gas back up boosters available ensuring the hot water is always a plenty.
Electric element
Natural & LPG Gas
Envirosun solar hot water systems are equipped with either electric boosters that can also have Natural or LPG gas boosters added to ensure that there’s plenty of hot-water available during the worst weather or when the demand for hot water is high.
Electric elements are fitted inside our storage tanks and the gas instantaneous heaters can be installed in-line from the outlet of our systems. Both options are designed to maximise the amount of solar energy that can be collected and utilise the auxiliary in a ‘back-up’ or ‘booster’ mode only.
Electrical element assisted solar
Electrical assisted systems are integrated arrangements that comprise a heating element immersed in the storage tank water, controlled by a thermostat and connected to a power-supply. Both the element and thermostat are positioned at the midpoint of the tank . With the power-supply on, if the temperature at the centre of the tank falls below 60°C, the thermostat ‘closes’ and the heating element operates. The element continues to operate until the mid-point of the tank rises to above 60°C. The location of the element and thermostat in an envirosun system are designed to only allow the booster to only heat the water in the top half of the tank and to leave the bottom portion available for useful solar gain. Our solar hot water systems have the ability to heat water without direct sunlight to approximately double the ambient air temperature, for instance if it is a overcast day and the outside temperature is 22°C for most of the day, your solar should be able to get the water to around 44°C.
Gas boosted solar
Gas boosted systems involve a continuous-flow gas water heater that is mounted separate from the storage tank. The outlet from the solar hot water system is piped as the inlet to the gas heater. If the water reaches the gas heater at a temperature below 60°C, the gas supply is opened, the spark-ignition system fires, and the gas burner operates. If the inlet water temperature is above 60°C, the gas heater does not operate.
Envirosun systems use this pre-heater configuration to achieve higher solar contribution and significantly lower greenhouse gas emissions.
How does an Envirosun® AS split solar hot water system work?
The Envirosun AS “active split” solar hot water heater, also known as split solar hot water systems, offer greater flexibility, improved aesthetics for your home, and a larger hot water storage tank capacity. These solar hot water systems only require the solar panels to be installed on the roof with the hot water storage tank located at ground level or any other convenient location.
Envirosun AS solar hot water systems are relatively simple in operation – when the solar hot water panels (also known as solar collectors) are able to add heat into the storage tank, a small pump is switched on to circulate hot-water from the collectors and replace it with cool water from the tank.
The circulation pumps are relatively small and silent and draw a negligible amount of power (less than 28W) that is also only used when operating or needing solar to increase the hot water storage cylinder’s temperature.
When the collectors are 6°C hotter than the water in the storage tank, the circulating pump is operated. When the differential falls to 4°C or lower, the pump is not operated. The microprocessor also uses the sensor information to control a suite of over-temperature protection modes:
if the water in the Envirosun storage tank reaches 70°C, the solar pump is not operated
if the solar collector panels temperature reaches 190°C, the pump is cycled on to control the temperature to below 185°C therefore protecting the solar panels
if the solar panels temperature reaches 200°C the pump is not operated to prevent damage
if the tank temperature has risen above 70°C and the collectors are cooler the pump is run intermittently to protect the storage tank from damage and overheating
The Envirosun AS smart control system is absolute state-of-the-art with an LED screen to tell you exactly what’s going on inside our weatherproof cover.
Envirosun's AS solar hot water heater range are available in three different storage tank sizes to suit any home and all are Australian made.
250 Litres 315 Litres 400 Litres
Why the Envirosun® AS Active Split system is a better solar water heater
More than 80% energy savings!
Break-even time is less than 3 years
Over $8000* in energy savings over 10 years
Reduce your carbon footprint and greenhouse gas emissions
* Based on power charged at $0.30/kWh
Check out some of the comparisons here on different hot water heater brands and the Australian Government tested and allocated STC rating.
The STC is a rated saving that a hot water system has been granted after testing and approved by the Australian Clean Energy Regulator. The number of STC’s that are issued refers to one megawatt hour (1 MWh) of avoided energy consumption over the hot water system’s deemed life expectancy.
S = R – T where S is STC count, R is Reference conventional system’s energy consumption (MWh over ten years), and T is Tested system’s estimated energy consumption (MWh over ten years).
Here is a graph showing savings and ratings of STC assigned to Active Solar hot water systems and the approximate percentage of power savings compared to a conventional electric water heater in Zone 3.
Data valid at time of publishing. Values reduce by 10% at the start of each year. Consult the REC Registry for current data.
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