JR GAS & WATER INSTALLER ASSESSMENT
Our Solar Hot Water Installer Verdict
This is the part of the product page we consider most important. It is our assessment of the product from the installer's side: construction, collector and cylinder positioning, solar pipework, boosting, commissioning and ongoing support, rather than a repeat of the specification sheet.
Local Hot Water Installation Areas
View all hot water service areas🏷️ Brand – Envirosun
🔢 Model Number – AS400/40SE
📦 Volume – 400L
📏 Width – 705mm
📐 Height – 705mm
🌍 Manufactured In – Australia
🛠️ Cylinder / Heat Exchange Material – Steel
🛡️ Cylinder / Heat-Exchange Warranty – 5 Years
🔇 Noise Level – NA dBa
⚖️Dry Weight – 93kg
⚡ Energy Source – Solar📡 WiFi Controller Built-in or Compatible –
⏲️ Built-In Timer – No
💡 LED/LCD Status Indicator –
📊 Coefficient of Performance (COP) –
Envirosun AS400/40 Installation Brisbane & Gold Coast
JR Gas & Water supplies and installs the Envirosun AS400/40 active split solar hot water system across eligible Brisbane and Gold Coast service areas. It is a large-capacity split solar system that keeps the storage tank at ground level while mounting the solar collectors on the roof.
The current Envirosun AS400/40Se uses a 420 litre nominal storage tank with two E20HS flat-plate solar collectors and active pumped circulation. In the electric-boosted configuration, Envirosun specifies a 2.4kW booster and 253 litres of boost capacity. The split layout can be particularly useful where homeowners want substantial solar storage without placing a storage cylinder on the roof.
Solar hot water installation is highly site-dependent, so JR assesses more than the model alone. Roof suitability, collector position, tank location, solar flow and return pipework, electrical or gas boosting, access and the existing hot water arrangement all affect whether the AS400/40 is the right installation for a particular property.
Envirosun AS400/40 Supply & Installation at a Glance
Product Type
Active split solar hot water system with a ground-level storage tank and roof-mounted flat-plate collectors.
Storage Capacity
420L nominal storage in the current AS400/40Se manufacturer specification.
Solar Collectors
Two Envirosun E20HS flat-plate collectors with active pumped circulation.
Installation Area
Professional supply and installation across eligible Brisbane and Gold Coast service areas.
Who Is the Envirosun AS400/40 Best For?
Higher Hot Water Demand
The AS400/40 sits at the larger end of Envirosun's active split range, with 420L nominal storage. It is worth considering where a smaller solar storage tank may not provide the storage reserve wanted for the household's normal hot water pattern.
Ground-Level Tank Preference
Because the collectors and tank are separated, the storage cylinder remains at ground level rather than forming part of a roof-mounted close-coupled assembly. This reduces roof load from stored water and keeps the tank more accessible.
Solar Replacement or Upgrade
It can suit replacement of an existing split solar system or an upgrade from another hot water technology where the roof, tank position, pipework and booster requirements make a solar conversion practical.
Is the Envirosun AS400/40 Right for My Home?
A Good Choice If...
You want a large active split solar system, have suitable roof space for two collectors, have a workable ground-level tank position and want to maximise the contribution solar energy can make to water heating.
Consider Another Option If...
Your roof has poor solar access, collector installation is impractical, there is no suitable tank position, or you would prefer a system with less roof-mounted equipment. A heat pump, electric storage or another hot water technology may make more sense on some sites.
JR Should Check First If...
You are changing from a different hot water technology, relocating the tank, changing the booster arrangement, have difficult roof access, need long solar pipe runs or are unsure whether the existing electrical and plumbing services can be reused.
How Many People Does the Envirosun AS400/40 Suit?
The current AS400/40Se provides 420L nominal storage and is positioned by Envirosun as one of the larger-capacity systems in its active split range. JR's existing product information has marketed the model toward larger households, but household sizing should not be determined from litres alone.
Actual suitability depends on shower length, shower flow rates, bath use, simultaneous demand, dishwasher and laundry habits, when hot water is consumed, solar contribution and how the booster is configured. A household with concentrated morning or evening demand can place very different requirements on a system compared with the same number of people using hot water throughout the day.
For this reason, JR should confirm the household's actual demand when the AS400/40 is being selected specifically for a larger family or as an upgrade from a smaller storage system.
How Does the Envirosun AS400/40 Work?
The AS400/40 separates solar collection from hot water storage. The E20HS collectors are mounted on the roof where they absorb solar energy, while the VE400 storage tank remains at ground level.
A circulation pump transfers heated water between the collectors and storage tank. Envirosun's DeltaSol B controller monitors collector and tank temperatures using sensors and operates the circulation pump when useful solar heat is available. The manufacturer states that the controller activates the pump when the collector is 10°C hotter than the tank.
The result is a simple energy path: sunlight reaches the roof collectors → solar energy heats the circulating water → the pump transfers that heat to the ground-level tank → stored hot water is available for household use.
When solar input is not sufficient to meet demand, the system's booster provides supplementary water heating. The current AS range supports electric and gas boosted configurations, with this AS400/40Se product configuration using electric boosting.
Key Features of the Envirosun AS400/40
420L Nominal Storage
The current AS400 tank provides 420L nominal storage, giving the system substantial stored-water capacity.
Two E20HS Solar Collectors
The AS400/40Se uses two E20HS flat-plate collectors. Envirosun specifies selective surfaces, laser-welded copper risers, thermal insulation and tempered solar glass.
Active Pumped Circulation
A circulation pump moves solar-heated water between the roof collectors and the ground-level storage tank rather than relying on a roof-mounted tank.
DeltaSol B Controller
The controller compares collector and tank temperatures and manages circulation according to available solar heat.
Solar Protection Functions
Envirosun states that the controller incorporates functions for high-temperature management and frost-risk reduction.
STC Eligible System
The AS solar range is listed by Envirosun as Clean Energy Regulator accredited and eligible to generate Small-scale Technology Certificates where applicable.
Envirosun AS400/40 Specifications
| Specification | Details |
|---|---|
| Brand | Envirosun |
| Model | AS400/40Se |
| Product Type | Active split solar hot water system |
| Storage Capacity | 420L nominal |
| Tank Model | VE400/E24/V-DM |
| Tank Footprint | 705 × 705mm |
| Tank Height | 1,705mm |
| Tank Empty Mass | 115kg |
| Tank Full Mass | 535kg |
| Collectors | 2 × E20HS flat-plate collectors |
| Collector Footprint | 1,235 × 2,000mm each |
| Collector Height | 70mm each |
| Collector Empty Mass | 27.5kg each |
| Collector Full Mass | 29.2kg each |
| Approx. Roof Footprint | 2,270 × 2,050mm |
| Ground System Footprint | 870 × 705mm |
| Controller | DeltaSol B |
| Circulation | Active pumped circulation |
| Electric Booster | 2.4kW |
| Electric Boost Capacity | 253L |
| CER Code | AS400/40/O/E24/E20HS-DM |
What Is Required to Install the Envirosun AS400/40?
A split solar installation requires both a suitable roof installation and a suitable ground-level tank installation. The exact requirements depend on the property and whether the work is a like-for-like solar replacement or conversion from another hot water technology.
Additional requirements can apply depending on roof construction, installation height, pipe-run length, electrical condition, existing valves, drainage and the previous hot water system.
What's Included With Envirosun AS400/40 Installation?
Standard Installation
The selected JR installation package covers the applicable installation scope shown in the live product selector. Depending on the selected package, this can include tank positioning, collector installation, plumbing alterations, valves, electrical disconnect/reconnect and disposal.
Compliance & Commissioning
The system is connected, checked and commissioned for correct operation. This includes checking the solar circulation arrangement, controller operation, plumbing connections, booster operation and applicable installation requirements.
Possible Additional Work
Difficult roof access, elevated installations, non-standard collector mounting, long pipe runs, relocation, electrical upgrades, new circuits, drainage alterations or other site-specific work can change the required package or require a separate quote.
How Much Does Envirosun AS400/40 Installation Cost?
Current Envirosun AS400/40 supplied-and-installed pricing is shown in the live product and installation selector above. Using the live selector rather than hard-coding a price here means customers see the current package price and available installation choices.
The final Envirosun AS400/40 installation cost depends on whether the job is a solar-to-solar replacement or conversion from another system, the selected installation package, roof height and access, existing pipework, valves, drainage, electrical requirements, relocation and any additional work required by the property.
A straightforward replacement of an existing compatible split solar system can require less alteration than converting an electric, gas or other hot water installation to active split solar. Where the site falls outside the defined online package conditions, JR can assess the work and provide the appropriate quote pathway.
Envirosun AS400/40 Installation Brisbane
JR Gas & Water supplies and installs the Envirosun AS400/40 in eligible Brisbane service areas. For an existing split solar replacement, the first checks include whether the existing tank position remains suitable, whether the roof collector area can accommodate the current E20HS collectors and whether existing solar pipework and electrical services can be reused or need upgrading.
For Brisbane homes changing from electric storage, gas or another hot water technology, the installation requires additional consideration because both the roof collector circuit and ground-level solar equipment need to be incorporated into the property. Roof height, access, shading, collector orientation, pipe-run length and the location of the 420L storage tank can all influence the final scope.
JR's installation process is designed to identify those requirements before treating the job as a simple product swap. Where the property matches the online package conditions, customers can select the applicable installation package and preferred installation option through the product page.
Envirosun AS400/40 Installation Gold Coast
Gold Coast Envirosun AS400/40 installations need enough usable roof area for the two E20HS collectors as well as a practical position for the large ground-mounted storage tank. This is particularly important when replacing a different solar configuration or relocating equipment during renovations.
Because the AS400/40 is an active system, the roof and tank are connected by a pumped solar circuit. The route between those components needs to be practical, properly installed and accessible enough to complete the work safely. Existing booster arrangements and electrical services also need to suit the selected configuration.
JR provides supplied-and-installed solar hot water options across eligible Gold Coast service areas, with package selection based on the actual replacement or conversion being completed rather than treating every solar installation as identical.
Can the Envirosun AS400/40 Replace My Existing System?
Replacing an Existing Split Solar System
This is generally the most direct replacement scenario, but compatibility still depends on the existing tank position, collector mounting, pipework, valves, electrical arrangement and dimensions of the new equipment.
Replacing Close-Coupled Solar
The AS400/40 uses a ground-mounted tank, so replacing a roof-mounted tank-and-collector system changes the installation layout. A suitable ground position and new or altered solar pipework may be required.
Replacing Electric or Gas Storage
A conversion can be possible where the property has suitable roof space and a workable solar installation path, but it is more involved than a like-for-like tank replacement because roof collectors and the pumped solar circuit must be added.
Replacing Another Brand
The previous system does not need to be Envirosun. What matters is whether the AS400/40 equipment, plumbing, roof collectors and booster arrangement can be installed correctly at the property.
Which Envirosun Active Split Variant Do I Need?
The current Envirosun AS electric-boosted range includes the AS315/40Se, AS400/40Se and AS400/60Se. The most important differences are storage capacity and collector quantity.
| Model | Storage | Collectors | Electric Booster | Key Difference |
|---|---|---|---|---|
| AS315/40Se | 320L | 2 × E20HS | 2.4kW | Smaller storage option |
| AS400/40Se | 420L | 2 × E20HS | 2.4kW | Larger storage with two collectors |
| AS400/60Se | 420L | 3 × E20HS | 2.4kW | Same storage with additional collector area |
The AS400/40Se therefore occupies the middle position in this group: it provides the larger 420L storage tank while retaining a two-collector roof array. Selection should still be based on household demand and the installation site rather than choosing solely from the model number.
How Efficient Is the Envirosun AS400/40?
The AS400/40 is designed to use roof-mounted solar collectors as the primary heat source whenever suitable solar energy is available, with the booster providing supplementary heating when required.
Actual energy consumption cannot be represented by one universal figure because it depends on solar exposure, collector orientation, weather, hot water consumption, inlet water temperature, booster operation and household usage patterns. A well-sited solar installation with appropriate demand can reduce the amount of purchased energy needed for water heating compared with relying entirely on conventional electric resistance heating.
The system is also eligible to generate STCs where the installation meets the applicable requirements. STC values are time-sensitive and depend on factors including installation date and location, so the current applicable value should be taken from the live pricing and rebate process rather than permanently stated in long-form page copy.
How Does the Envirosun AS400/40 Compare With Similar Envirosun Options?
| Feature | AS315/40Se | AS400/40Se | AS400/60Se |
|---|---|---|---|
| Storage Capacity | 320L | 420L | 420L |
| Collector Type | E20HS | E20HS | E20HS |
| Collector Quantity | 2 | 2 | 3 |
| Electric Booster | 2.4kW | 2.4kW | 2.4kW |
| Boost Capacity | 187L | 253L | 253L |
| Tank Footprint | 620 × 620mm | 705 × 705mm | 705 × 705mm |
| Typical Reason to Consider | Lower storage requirement | Higher storage with two collectors | Higher storage plus larger collector array |
The AS400/40 is not automatically the right model simply because it has the larger tank. The AS315/40 may be sufficient where demand is lower, while the AS400/60 adds a third collector where the application calls for greater collector area. JR can assess the combination of household demand and available roof area before installation.
Envirosun AS400/40 Installation FAQs
How much does Envirosun AS400/40 installation cost?
Current supplied-and-installed pricing is shown in the live product selector above. Final cost depends on the installation package, roof height and access, replacement type, pipework, valves, drainage, electrical requirements and whether the system is being relocated or installed as a conversion.
Can JR Gas & Water install the Envirosun AS400/40 in Brisbane?
Yes. JR supplies and installs the Envirosun AS400/40 across eligible Brisbane service areas, subject to roof suitability, safe access, tank location and the installation conditions applying to the property.
Can JR install the Envirosun AS400/40 on the Gold Coast?
Yes. Supplied-and-installed AS400/40 packages are available in eligible Gold Coast service areas. The roof collector position, ground-level tank location, solar pipework and booster requirements must all be suitable.
Is the Envirosun AS400/40 a 400L system?
The model is called AS400/40, but Envirosun's current specification lists the AS400/40Se at 420L nominal storage. The AS400 model designation should therefore not be read as the current published nominal storage volume.
How many solar collectors does the AS400/40 use?
The current AS400/40Se uses two E20HS flat-plate solar collectors. Each collector has a manufacturer-listed footprint of 1,235 × 2,000mm.
Does the Envirosun AS400/40 have an electric booster?
Yes. The current AS400/40Se electric-boosted configuration has a manufacturer-listed 2.4kW electric booster and 253L boost capacity.
Can the AS400/40 replace another brand of solar hot water system?
Potentially, yes. Replacement suitability depends on the existing tank location, collector mounting, roof area, solar pipework, plumbing, electrical services and booster arrangement rather than the previous brand alone.
Can the AS400/40 replace an electric or gas hot water system?
It can where the property is suitable for conversion to active split solar. Unlike a simple storage-tank replacement, the conversion requires roof collectors, a solar circulation circuit and the associated controller and pump equipment, so the site needs to be assessed accordingly.
Does the AS400/40 tank go on the roof?
No. The active split design places the storage tank at ground level while the solar collectors are installed on the roof. Water is circulated between the two parts of the system by a pump.
How much roof space does the AS400/40 require?
Envirosun lists an approximate roof footprint of 2,270 × 2,050mm for the AS400/40Se collector array. Actual mounting space and suitability must also account for roof construction, access, mounting requirements and the installation layout.
Is the Envirosun AS400/40 eligible for STCs?
The Envirosun AS range is listed by the manufacturer as Clean Energy Regulator accredited and STC eligible. The actual number and value of certificates depend on the applicable scheme rules, installation date and location.
What happens if my property does not suit the standard installation package?
Non-standard work can be assessed separately. Difficult roof access, unusual collector mounting, relocation, long pipe runs, electrical upgrades and other site-specific requirements may require a different package or quotation rather than being treated as a standard installation.
Envirosun AS400/40 Warranty and Maintenance
Manufacturer Warranty
Envirosun currently promotes a 10-year warranty for its solar range effective from 26 June 2026. Warranty coverage is subject to the manufacturer's current warranty terms, component conditions, installation requirements and applicable exclusions, so the current Envirosun warranty document should govern any claim.
JR Lifetime Warranty Eligibility
The JR product page currently identifies this system as Lifetime Warranty eligible. JR workmanship or service warranty coverage is separate from the Envirosun manufacturer product warranty and remains subject to JR's applicable warranty terms.
Ongoing Maintenance
Solar hot water equipment should remain accessible for inspection and servicing. The storage tank, valves, solar circulation components, controller, collectors, booster and associated plumbing should be maintained in accordance with Envirosun's current service and warranty requirements.
Why Choose JR Gas & Water for Envirosun AS400/40 Installation?
Solar hot water is an installation-led product. A quality system still needs the right collector location, pipework, tank position, booster configuration and commissioning to deliver the intended result.
JR Gas & Water specialises in hot water installation across South East Queensland and has completed more than 10,000 hot water installations. JR is QBCC licensed, services Brisbane and the Gold Coast, and provides online product and installation package selection for eligible jobs.
With the Envirosun AS400/40, the focus is therefore not simply supplying a 420L solar system. It is establishing whether this particular active split configuration makes sense for the household and property, then matching the installation package to the work actually required.
Compare Solar Hot Water Systems & Installation Options
Solar hot water is only one way to reduce purchased energy used for water heating. Depending on the property, household demand, roof suitability and existing services, another solar configuration, a heat pump, electric storage or gas hot water system may be worth comparing before installation.
Use JR's main hot water navigation to compare the currently available system categories and installed options before selecting the final replacement.
Install the Envirosun AS400/40 With JR Gas & Water
The Envirosun AS400/40Se is a high-capacity active split solar option for properties that can accommodate a 420L ground-mounted tank and two roof-mounted E20HS collectors. Its main advantage is combining substantial storage with a split layout that keeps the storage cylinder off the roof.
Before installation, the key checks are roof suitability, collector positioning, tank location, solar pipework, access and booster requirements. If the property fits the available online installation conditions, select the appropriate package and preferred installation option above. For non-standard installations or conversions requiring further assessment, use JR's quote pathway.
Solar hot water systems are an efficient and environmentally friendly way to heat your water, using energy from the sun to reduce electricity or gas consumption. To continue operating efficiently and reliably, they require regular maintenance and servicing.
Like any hot water system, manufacturers recommend routine maintenance to maximise system performance, protect key components and support your manufacturer's warranty.
Homeowner Maintenance – Every 6 Months
Every six months we recommend carrying out a simple visual inspection of your solar hot water system.
Homeowners should:
- Carefully operate the Pressure & Temperature Relief (PTR) Valve.
- Operate the Expansion Control Valve (ECV) (where fitted).
- Check for water leaks around the storage tank and pipework.
- Inspect visible solar pipe insulation for deterioration.
- Ensure solar collectors are free from excessive dirt, leaves and debris where safely accessible.
- Check for signs of corrosion or rust.
- Listen for unusual noises from the system or circulating pump (where fitted).
Why is this important?
Regular operation of the PTR and ECV valves helps prevent mineral build-up that can cause the valves to seize or leak.
Keeping collectors and surrounding components clean allows the solar system to operate as efficiently as possible, while early detection of leaks or damaged insulation can prevent larger problems from developing.
Important: Always follow your manufacturer's instructions when operating safety valves, as hot water will discharge during testing. Do not climb onto your roof to inspect or clean collectors. If you're unsure, contact a licensed plumber.
JR 6-Month Solar Hot Water Health Check
Recommended Service – $99
Our professional inspection helps ensure your solar hot water system continues operating safely and efficiently while identifying issues before they become costly repairs.
Our technician will:
- Inspect the complete hot water system.
- Check for leaks and corrosion.
- Test the PTR valve.
- Test the ECV (where fitted).
- Inspect exposed solar pipework and insulation.
- Check storage tank condition.
- Inspect booster operation (electric or gas).
- Check circulating pump operation (where fitted).
- Inspect controller operation (where applicable).
- Confirm system heating performance.
- Inspect valves, fittings and pipework.
- Identify components showing signs of wear.
Service Price: $99
Routine inspections help maximise solar efficiency, reduce energy costs and minimise the likelihood of unexpected breakdowns.
Recommended 5-Year Major Service
Current Price: $449
Most solar storage hot water systems benefit from scheduled replacement of key components to maintain reliable performance and extend the life of the storage tank.
Our comprehensive 5-Year Service includes:
- Replacement of the sacrificial anode (where fitted).
- Replacement of the Pressure & Temperature Relief (PTR) Valve.
- Replacement of the Expansion Control Valve (ECV).
- Inspection of the solar collectors.
- Inspection of solar pipework and insulation.
- Inspection of circulating pump and controller (where fitted).
- Inspection of booster operation.
- Full operational testing.
- Leak and corrosion inspection.
Why These Components Matter
Sacrificial Anode
Most vitreous enamel-lined solar storage tanks contain a sacrificial anode.
The anode gradually corrodes instead of the steel storage tank, protecting it from internal rust. Once the anode has been consumed, the tank itself begins to corrode, which can eventually lead to leaks and tank failure.
Replacing the anode at the recommended interval is one of the best ways to extend the life of your hot water system.
Pressure & Temperature Relief (PTR) Valve
The PTR valve protects the storage tank by safely relieving excessive pressure and temperature.
Mineral deposits and normal wear can prevent the valve from operating correctly over time, making routine testing and replacement essential.
Expansion Control Valve (ECV)
Where fitted, the ECV controls pressure created as water expands during heating.
Maintaining the ECV helps reduce stress on the storage tank and plumbing system, contributing to a longer service life.
Solar Collectors & Pipework
Solar collectors capture the sun's energy to heat water, while insulated pipework transfers that heat to the storage tank.
Keeping collectors unobstructed and ensuring pipe insulation remains in good condition helps:
- Maximise solar efficiency.
- Reduce reliance on electric or gas boosting.
- Lower energy costs.
- Improve overall system performance.
If Your Hot Water System Isn't Working
Before arranging a service, check the following:
- Ensure power is switched on (for electric boosted systems).
- Confirm the gas supply is on (for gas boosted systems).
- Check circuit breakers and safety switches where applicable.
- Verify the booster has not been turned off.
- Inspect for visible water leaks.
- Ensure exposed solar pipe insulation has not been damaged.
- Check for controller fault codes (where fitted).
- Listen for unusual noises from the circulating pump (where fitted).
- Remember that several cloudy days may reduce solar heating, causing the booster to operate more frequently.
If your system is still not producing adequate hot water, contact JR Gas & Water for professional diagnosis and repair.
General Signs Your System May Need Attention
Arrange a service if you notice:
- Reduced hot water availability.
- Booster operating more frequently than usual.
- Water leaking from the tank or pipework.
- Constant dripping from relief valves.
- Visible corrosion.
- Damaged or deteriorated pipe insulation.
- Pump noise or failure (where fitted).
- Controller fault codes.
- Rust-coloured or dirty water.
- Unusual noises during operation.
Early servicing can often prevent more expensive repairs and extend the life of your solar hot water system.
Protect Your Warranty & Maximise System Life
Routine maintenance helps ensure your solar hot water system continues operating safely, efficiently and reliably.
Following the manufacturer's recommended maintenance schedule may also assist in maintaining warranty coverage.
Failure to maintain your system may result in:
- Premature tank corrosion.
- Reduced solar efficiency.
- Higher electricity or gas consumption.
- Leaking or seized safety valves.
- Unexpected loss of hot water.
- Shortened system lifespan.
- Possible reduction or loss of manufacturer warranty, depending on the manufacturer's maintenance requirements.
Preventative maintenance is one of the best ways to protect your investment, reduce operating costs and maximise the life of your solar hot water system.
Please note: Maintenance requirements vary between manufacturers and models. Always refer to your owner's manual for the maintenance schedule applicable to your solar hot water system. JR Gas & Water services all major solar hot water brands in accordance with manufacturer recommendations where applicable.
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Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.
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