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AS Active Split Range
Solar · Active split

AS Active Split Range

Active split · Pumped circulation · Roof collectors · Ground-mounted tank · Electric or gas boosted

The Envirosun® AS Active Split System separates the solar collectors from the storage tank, giving you greater flexibility in installation and improved aesthetics. Roof-mounted flat plate collectors harvest the sun's energy and transfer it via a small circulation pump to a ground-level storage tank — which can be located indoors or outdoors. With the latest collector technology and advanced electronic controls, the AS range delivers maximum solar absorption and storage across all Australian climates.

Key Features

  • Ground-mounted tank

    The storage tank sits at ground level — indoors or outdoors — for easier access, reduced roof load, and installation flexibility.

  • Roof-installed solar collectors

    High-performance flat plate collectors on the roof capture maximum solar energy and feed it to the storage tank.

  • Active pumped circulation

    A small circulation pump, controlled by an electronic microprocessor, moves heated water from collectors to tank efficiently.

  • Smart AS system controller

    The DeltaSol® B controller uses two temperature sensors to compare collector and tank temperatures, activating the pump only when the collector is 10°C hotter than the tank.

  • Overheating & frost protection

    The controller includes overheating protection, cooling for high temperatures, and frost risk reduction.

  • Greater capacity

    Available in 320L and 420L tank options, with up to three collectors — suited to larger households and higher demand.

  • Latest collector technology

    E20HS selective surface collectors with laser-welded copper risers, weather-resistant aluminium trays, thermal insulation, and tempered solar glass maximise solar absorption.

  • Compliant & STC eligible

    Fully accredited by the Clean Energy Regulator and listed on the CER Register. Eligible to generate STCs.

At-a-Glance

AS315/40Se · AS400/40Se · AS400/60Se
Models AS315 · AS400
Storage range 320L – 420L
Collector type Flat plate (E20HS)
Controller DeltaSol® B
Boost options Electric or gas

STC COMPARISON

Envirosun AS 400/60 solar hot water system receives 40 STC 87%
Dux 315L 2P solar hot water system receives 39 STC 85%
Rinnai 315L Sunmaster solar hot water system receives 36 STC 75%
Chromagen 300 solar hot water system receives 30 STC 65%
Solahart 325 split solar hot water system receives 30 STC 65%
Rheem 325 Lowline solar hot water system receives 30 STC 65%
*Small Technology Certificates (STC) are based on the 10-year Clean Energy Regulator data and reduce by 10% at the end of every year. 2024 STCs are 30% lower than above table. STC values are correct at the time of publication but will change each year due to Legislation on the 1st January.
Envirosun AS solar hot water systems are fully accredited by the Australian Government Clean Energy Regulator and listed on the CER Register. Purchasing an eligible system may entitle you to Small-scale Technology Certificates (STCs) — renewable energy credits that reduce the upfront cost of your system. The number of STCs is determined by your installation date, system size, and geographic location. The deeming period reduces annually until the scheme closes in 2030.
Envirosun Electric Boosted Range
Specification AS315 AS400 AS400
SYSTEM
Model AS315/40Se AS400/40Se AS400/60Se
CER code AS315/40/O/E24/E20HS-DM AS400/40/O/E24/E20HS-DM AS400/60/O/E24/E20HS-DM
Storage capacity 320L 420L 420L
Mass empty 176kg 143kg 229kg
Mass full (on roof) 65kg 65kg 95kg
Mass full (on ground) 422kg 544kg 544kg
Footprint (on roof) 2,270 x 2,050mm 2,270 x 2,050mm 3,362 x 2,050mm
Footprint (on ground) 782 x 617mm 870 x 705mm 870 x 705mm
Boost capacity 187L 253L 253L
TANK
Model VE315/E24/V-DM VE400/E24/V-DM VE400/E24/V-DM
Mass empty 93kg 115kg 115kg
Mass full 414kg 535kg 535kg
Footprint 620 x 620mm 705 x 705mm 705 x 705mm
Height 1,765mm 1,705mm 1,705mm
COLLECTORS
Model E20HS E20HS E20HS
Quantity 2 2 3
Mass empty (each) 27.5kg 27.5kg 27.5kg
Mass full (each) 29.2kg 29.2kg 29.2kg
Footprint (each) 1,235 x 2,000mm 1,235 x 2,000mm 1,235 x 2,000mm
Height 70mm 70mm 70mm
ELECTRIC BOOSTER
Rating 2.4kW 2.4kW 2.4kW
Envirosun Gas Boosted Range
Specification AS315 AS400 AS400
SYSTEM
Model AS315/40Sg AS400/40Sg AS400/60Sg
CER code AS315/40/O/GR26/E20HS-DM AS400/40/O/GR26/E20HS-DM AS400/60/O/GR26/E20HS-DM
Storage capacity 320L 420L 420L
Mass empty 193kg 165kg 250kg
Mass full (on roof) 65kg 65kg 95kg
Mass full (on ground) 422kg 544kg 544kg
Footprint (on roof) 2,270 x 2,050mm 2,270 x 2,050mm 3,362 x 2,050mm
Footprint (on ground) 782 x 617mm 870 x 705mm 870 x 705mm
Boost rate (max) 26L/min 26L/min 26L/min
TANK
Model VE315/E24/V-DM VE400/E24/V-DM VE400/E24/V-DM
Mass empty 93kg 115kg 115kg
Mass full 414kg 535kg 535kg
Footprint 620 x 620mm 705 x 705mm 705 x 705mm
Height 1,765mm 1,705mm 1,705mm
COLLECTORS
Model E20HS E20HS E20HS
Quantity 2 2 3
Mass empty (each) 27.5kg 27.5kg 27.5kg
Mass full (each) 29.2kg 29.2kg 29.2kg
Footprint (each) 1,235 x 2,000mm 1,235 x 2,000mm 1,235 x 2,000mm
Height 70mm 70mm 70mm
GAS BOOSTER
Gas consumption 188MJ/hr 188MJ/hr 188MJ/hr
Heat output 42kW 42kW 42kW