Dux Ecosmart 400L Solar Hot Water System $6199 Installed - Water Heaters
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Dux Ecosmart 400L Solar Hot Water System | Supply+Install | LIFETIME WARRANTY

Hot water, hassle-free. This Dux is built for families who value reliability, efficiency, and peace of mind. With expert installation and unbeatable service, you’re in the best hands!
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Quick Specs & Benefits
  • 🔢 Model: 400DPM36
  • 📦 Volume: 400L
  • 📏 Width: 820 mm
  • 📐 Height: 1700 mm
  • 👨‍👩‍👧‍👦 Recommended Household Size: 8 people
  • 🔇 Noise Level: NA dB
  • 🛠️ Internal Cylinder Material: Steel
  • 🌍 Made In: Australia
  • 🔥 STC Rebate Eligible - $1000 Upfront Discount Included

    What is an STC?

    STC stands for Small-scale Technology Certificate. It is part of an Australian Government scheme designed to encourage energy-efficient hot water systems and other eligible renewable technologies.

    How does it work?

    When your new system qualifies, STCs are created based on the expected energy savings and location of the installation. These certificates have a value, and that value is applied as an upfront discount to help reduce the installed cost.

    How is it shown on our jobs?

    For eligible systems, the STC value is already included as a flat rate $1000 upfront discount in the total installed price shown, so you do not need to claim it separately after installation.

    Who is eligible?

    Eligibility generally applies to installations of approved systems at Australian homes and businesses where the product, property type, and installation details meet current STC program requirements.

    If you are unsure whether your property or system qualifies, contact us before ordering and we can help confirm it.

2024–25 ProductReview Award Winner – JR Gas & Water
JR Gas & Water
Select Your Required Package and Install Timeframe Below

Choose your installation package first, then choose your preferred timeframe. Not sure which package suits your home?

STEP 1. - Select Post Rebate Installation Package (STC Rebates signed over to JR Gas & Water on install)
STEP 2. - Select Preferred Installation Day
STEP 3. - Select Installation Area
Your Final Cost is
Regular price $7,999.00
Regular price Sale price $7,999.00
Save $-7,999
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Installed hot water packages available in eligible JR Gas & Water service areas
Free delivery included with eligible installed packages
Licensed installation available across Brisbane, Logan, Redlands, Ipswich, Moreton Bay and Gold Coast service areas
Check your install postcode
Not 100% sure? Prefer a written quote first?

For solar hot water installations with roof access requirements, collector or panel changes, non-standard pipework, booster requirements, tight access, relocation work, valve upgrades, drainage issues, or uncertainty around the correct system size, our team can confirm the best option before you book.

Get Written Quote
✔ Service by Licensed Professionals  •  ✔ Fixed Price Services

🏷️ Brand – Dux
🔢 Model Number
– 400DPM36
📦 Volume
– 400L
📏 Width – 820mm
📐 Height – 1700mm
🌍 Manufactured In – Australia
🛠️ Cylinder / Heat Exchange Material
– Steel
🛡️ Cylinder / Heat-Exchange Warranty
– 5 Years
🔇 Noise Level – NA dBa
⚖️Dry Weight – 116kg
⚡ Energy Source – Solar📡 WiFi Controller Built-in or Compatible
⏲️ Built-In Timer
– No
💡 LED/LCD Status Indicator

📊 Coefficient of Performance (COP)

Dux EcoSmart Electric Boosted Solar 400L 2 Panel Installation in Brisbane & Gold Coast

The Dux EcoSmart Electric Boosted Solar 400L 2 Panel is a split solar hot water system designed for homes wanting high-capacity solar hot water with a ground-level storage tank and roof-mounted collectors. It uses a 400L ground mounted solar tank with 2 roof mounted collectors and electric boosting for backup when solar gain is not enough. 

What Is the Dux EcoSmart Electric Boosted Solar 400L 2 Panel?

The Dux EcoSmart Electric Boosted Solar 400L 2 Panel is an electric boosted split solar hot water system. The tank sits at ground level while the collectors sit on the roof, which gives more installation flexibility than a roof-mounted close-coupled system. The split design also helps avoid the need for expensive roof reinforcement that can come with some roof-mounted tank setups. 

This exact model uses a 400L tank, 2 solar panels, and continuous tariff energy supply. It is rated for 4 to 7 people and uses a mid-point electric boost delivering 230L of boost capacity. 

Why Choose the Dux EcoSmart Electric Boosted Solar 400L 2 Panel?

One of the main reasons people choose the Dux EcoSmart Electric Boosted Solar 400L 2 Panel is because it combines strong solar contribution with practical backup heating. It uses high performance selective surface solar collectors, a European controller and circulator with low power consumption, and multi-temperature tank sensors to optimise solar gain while reducing overheating risk.

This model also suits buyers wanting a larger solar tank for stronger household demand without moving to the 3 panel version. It is built around an Australian made solar tank with dense 50mm polyurethane insulation, commercial specification enamel, and an anode for tank protection. It is also promoted as class leading in efficiency for maximum running cost savings.

Is the Dux EcoSmart Electric Boosted Solar 400L 2 Panel Right for Your Home?

This model can be a strong fit for households with moderate to high hot water demand, especially homes wanting a split solar setup with the tank off the roof. It is rated for 4 to 7 people, so it is better suited to larger family use than the smaller 250L and 315L versions.

As with any solar hot water system, suitability depends heavily on the site. Roof space, collector orientation, pipe run distance, ground-level tank position, boosting arrangement, and available access all matter. The split design is a real advantage on homes where keeping weight off the roof matters or where the tank location needs to stay at ground level. Dux also describes the system as using pumped circulation, which is relevant when planning layout and frost protection considerations. 

Final installation scope depends on what is already at the property. Some jobs are straightforward replacements, while others may require extra works. Depending on the site, that may include roof mounting arrangements, pipework alterations, electric boost integration, valve upgrades, tempering requirements, electrical work, or changes to suit the final tank location.

Why Choose a Quality Hot Water System Instead of a Cheaper Alternative?

A cheaper solar hot water system is not always the better buy once installation complexity, long-term efficiency, durability, and actual site suitability are taken into account. This system is built around strong efficiency, quality solar control hardware, high-performance collectors, and an Australian made insulated tank rather than just bare minimum solar supply.

The bigger issue is installation suitability. Even a good solar system can become the wrong choice if the collector position, pipe runs, boosting arrangement, or tank location are not properly planned. That is why JR Gas & Water focuses on the overall installation result, not just the unit itself.

Professional Dux EcoSmart Electric Boosted Solar 400L 2 Panel Installation in Brisbane & Gold Coast

JR Gas & Water provides professional Dux EcoSmart Electric Boosted Solar 400L 2 Panel installation in Brisbane & Gold Coast, with the installation assessed around the roof layout, current hot water setup, pipework path, booster requirements, tank location, and the home’s actual hot water usage. Whether it is a solar hot water replacement in Brisbane or hot water installation on the Gold Coast, the goal is to make sure the system suits the site rather than forcing a solar model into the wrong property conditions.

We also service surrounding areas including Logan, Ipswich, Moreton Bay and Redlands. Our approach is practical and installation-led. That means checking whether the roof is suitable for the 2 panel collector layout, whether the ground-level tank location is workable, whether access is safe and practical, and what extra works may be required to complete the installation safely and compliantly.

What’s Involved in Installing the Dux EcoSmart Electric Boosted Solar 400L 2 Panel?

Installing the Dux EcoSmart Electric Boosted Solar 400L 2 Panel is very different from installing a ground-level electric storage system or a close-coupled solar unit. The storage tank stays at ground level while the collectors are mounted on the roof, and the system relies on solar gain plus the electric boost element to deliver dependable hot water. Dux notes that the electric boosted models are fitted with a mid-mounted element so hot water is available on cloudy days or in times of high demand, and that connecting it to an off-peak electricity tariff can reduce running costs further.

In a standard installation, the work may include removal of the old hot water system where applicable, positioning the new 400L tank, roof mounting the 2 solar collectors, connecting solar flow and return pipework, integrating the electric boost arrangement, fitting or checking valves, tempering where required, commissioning the system, and testing operation. Depending on the site, that may also include roof access equipment, electrical work, extended pipe runs, upgraded valves, or changes to the existing plumbing layout.

Why Choose JR Gas & Water?

JR Gas & Water is installation-led, which matters with solar hot water because the success of the job depends heavily on the property, not just the product name. Split solar systems need practical assessment, not guesswork. The right result comes from making sure the system matches the roof, the plumbing layout, the boosting arrangement, the tank position, and the household demand.

We work with real homes across Brisbane and the Gold Coast, helping customers choose solar hot water systems that make sense for the property rather than relying on generic brochure claims. With a model like the Dux EcoSmart Electric Boosted Solar 400L 2 Panel, that means practical advice, realistic installation planning, and a stronger focus on what will actually work on site.

Dux EcoSmart Electric Boosted Solar 400L 2 Panel Installation FAQs

How much does Dux EcoSmart Electric Boosted Solar 400L 2 Panel installation cost in Brisbane or the Gold Coast?

Installation cost depends on the property and the system layout. A straightforward job with a suitable roof, practical tank position, and workable access is generally simpler than a job involving difficult roof access, long pipe runs, electrical work, boost changes, or other extra works. Final pricing depends on the existing setup and what is required for a safe and compliant installation.

Is the Dux EcoSmart Electric Boosted Solar 400L 2 Panel right for my home?

It can be a strong option for homes wanting a split solar hot water system with 400L storage, 2 roof-mounted collectors, and electric boosting. It is generally suited to 4 to 7 people, so it is better matched to larger family demand than lighter household use.

What is included in a standard Dux EcoSmart Electric Boosted Solar 400L 2 Panel installation?

A standard installation typically includes the core labour and materials needed to install the ground-level tank, mount the collectors on a suitable roof, and connect the system to the home’s hot water services where conditions allow. That may include tank placement, collector mounting, plumbing connections, valve assessment, electric boost integration, commissioning, and operational checks. Extra works may still be required depending on the site.

What warranty comes with the Dux EcoSmart Electric Boosted Solar 400L 2 Panel?

This model has a 7-year tank warranty, 5-year collector warranty, and 1-year parts and labour warranty.

Can JR Gas & Water install the Dux EcoSmart Electric Boosted Solar 400L 2 Panel in my area?

JR Gas & Water installs solar hot water systems across Brisbane and the Gold Coast, and also services Logan, Ipswich, Moreton Bay and Redlands. Availability depends on the job type, roof conditions, access, and site suitability, but we regularly handle solar hot water installation across these areas.

Solar Hot Water System Package Selection Guide

(Please rotate mobile device to landscape for easy viewing)

Choosing the right Solar hot water system package depends on your installation needs, household size, and whether additional electrical work is required. Use this guide to compare package levels and find the best fit for your home.

Selecting the right package helps streamline installation, but we understand that needs may change, and that the purchaser isn’t a plumber. We’re flexible and can make adjustments, such as upgrading to the next package as needed.

💡 Which Package is Right for You?

BaseFor compliant replacements
Ideal for identical direct swaps where the existing system meets compliance. No extra plumbing, electrical work or disposal required or included.

(EXAMPLE - A Rheem Loline 325 replacing complaint Rheem loline 325 not a Rheem loline 400l)

SilverFor minor upgrades
Includes pipework alterations and a valve kit but does not include electrical modifications or system disposal. Designed for those swapping a similar system and working to a tight budget. 

(EXAMPLE - Swapping a 10year old Rheem Loline 400L with a new Rheem Loline 325 where the existing installation is good but requires pipework alterations to adapt the new unit and new valve set for warranty)

🏆 Gold (Best Seller)For standard installations
Covers old system removal and plumbing modifications, making it the most common choice for standard installations.

(EXAMPLE - Swapping a 20year old Dux Ecosmart with a new Envirosun AS315, Strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

💰 Sapphire (Best Value)For installations requiring electrical work
Adds electrical safety features like an isolator, safety switch, and cable extensions to ensure a compliant and safe electrical connection.

(EXAMPLE - Swapping an old Conergy High Mount Boosted Unit with a new Envirosun AS400 mid mount boosted system that requires a lower hardwired electrical connection, then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

DiamondFor homes needing extensive electrical work
Provides extra plumbing and electrical modifications, including a new electrical circuit, making it ideal for homes without existing or undersized wiring for a solar system.

(EXAMPLE - Swapping an old solar system with undersized electrical with a new solar that needs its own dedicated 20amp electrical circuit, type then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

PlatinumThe ultimate package
Includes everythingsystem relocation, extensive plumbing and electrical upgrades, solar circulating lines, and a new electrical circuit for complete installation flexibility.

(EXAMPLE - Replacing any existing system of any type then relocating it to a new position on the house that requires the electrical/plumbing to be installed or relocated to the new installation position)


🏆 Package Comparison Guide

Feature Base Silver Gold 🏆 Best Seller Sapphire 💰 Best Value Diamond Platinum
Existing Unit Must be Identical Make/Model/Series as Purchase
Existing System Removal & Form 4 (Compliance Certification)
Pipework Alterations
Valve Kit (Required for System Operation)
Included Altered Pipework (m) 2m 8m 8m 8m 20m
🏆 Package Comparison Guide Base Silver Gold 🏆 Best Seller Sapphire 💰 Best Value Diamond Platinum
Support Base (For Uneven or Soft Ground)
FREE Waste & System Disposal
System Drainlines (Prevents Flooding & Improves Longevity)
Electrical Isolator (Ensures Safe Operation & Maintenance Access)
Electrical Extension (Required for Distance to Power Source)
🏆 Package Comparison Guide Base Silver Gold 🏆 Best Seller Sapphire 💰 Best Value Diamond Platinum
New Electrical Circuit (For Homes Without Existing Power Supply)
Safety Switch (Protects Your Home from Electrical Faults)
Included Altered Cabling (m) 2m 10m 10m
System Relocation (Move System to New Position)
Requires Existing Installation to be Compliant

Whenever a product is required, we only source from trusted, warranty‑backed manufacturers:

  • Valves – AVG, RMC, Rye Metal (and subsidiaries)
  • Copper – Type B Kembla or Crane
  • PEX Systems - Ezipex
  • Insulation – eFlex or K‑Flex
  • Electrical switches & timers – Hager
  • Conduit – Medium Duty PVC Vinidex or GTS
  • Brassware – Brasshards
  • Hydraulic crimp fittings – EziPress, Viega, Kembla
  • Sealants – Loxeal

Feel free to let us know if you have any other preferred brands!

🛠 Need Help Choosing?

Not sure which package is right for you? Contact JR Gas & Water, and we’ll help you select the best solution for your home!

If you're in Queensland and considering a heat pump hot water system, look no further than JR Gas & Water. Here's why:

Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of heat pump installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.

Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your heat pump hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.

Competitive Pricing: JR Gas & Water offers competitive pricing for their heat pump hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.

Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.

Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your heat pump hot water installation, you are supporting a local business and contributing to the local economy.

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.

Sustainable and Environmentally Friendly: Heat pump hot water systems are a sustainable and environmentally friendly option for heating water. They use renewable energy sources, such as air or ground heat, to heat water, resulting in lower greenhouse gas emissions and reduced energy bills. JR Gas & Water can help you make the switch to a more sustainable and cost-effective solution for your hot water needs.

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