Dux EcoSmart Electric Boosted Solar 400L
SunCity Hot Water supplies, installs and services the Dux EcoSmart Electric Boosted Solar 400L across the Sunshine Coast, Brisbane, Bribie Island and Gympie — backed by our quality workmanship guarantee. Call 1300 728 122.
Make the smart choice today—embrace clean, efficient energy with the Dux EcoSmart Electric Boosted Solar 400L system. Contact SunCity Hot Water to find out more and begin your journey toward sustainable hot water solutions.

Key Features
400L Ground-Mounted Solar Tank
The Dux EcoSmart system features a spacious 400-litre ground-mounted solar tank, designed to provide ample hot water for larger households. This high-capacity tank ensures sufficient hot water for daily activities, including showers, dishwashing, and laundry. Its robust construction guarantees durability and longevity, allowing consistent hot water service for years.
Multi-Temperature Tank Sensors
This feature optimises solar gain by continuously monitoring water temperature within the tank. By adjusting the system accordingly, these sensors maximise solar energy capture while minimising the risk of overheating, ensuring efficient performance throughout the day.
Mid-Point Electric Boosting
Equipped with midpoint electric boosting, the system provides 230 litres of boost capacity. This ensures a reliable supply of hot water during periods of high demand or on cloudy days when solar energy may be insufficient, so you never run out of hot water.
Is your Dux EcoSmart Electric Boosted Solar 400L not working?
No hot water, leaking or playing up? Don't rush to replace it — our licensed local technicians repair, service and replace Dux systems across the Sunshine Coast, Brisbane, Bribie Island and Gympie. We carry common parts, so many repairs are done the same day.
Repair
Leaks, no hot water, element, thermostat and valve faults — diagnosed and fixed fast.
Service
Anode, valves and safety checks to keep your system running longer.
Replace
Past its best? We supply and install a new system, often the same day.
Product Documents

Sustainable Energy Solution
The EcoSmart system uses solar power to reduce reliance on traditional energy sources, helping to lower your carbon footprint and contribute to a cleaner environment—a responsible choice for environmentally conscious consumers.

Advanced Insulation
This system includes a tank with dense 50mm thick polyurethane insulation, minimising heat loss and maintaining water temperature for longer periods. This reduces energy wastage and improves efficiency.

Eligible for $910 in STCs
This solar hot water system is eligible for $910 in Small-scale Technology Certificates (STCs), which help offset the initial purchase and installation costs, making the transition to solar energy more affordable.
Installation, Maintenance & Warranty
Installation

At SunCity Hot Water, our experienced technicians specialise in installing solar hot water systems, ensuring your EcoSmart system is installed correctly and efficiently. We manage everything from site assessment to connecting the system to your home’s plumbing and electrical systems. With our professional support, you can have peace of mind knowing your solar hot water system will operate optimally.
Maintenance

Maintaining the Dux EcoSmart Electric Boosted Solar system is essential for long-term performance and efficiency. SunCity Hot Water offers comprehensive maintenance services, including regular checks, troubleshooting, and necessary repairs, ensuring your system operates at its best. Our reliable maintenance support helps maximise energy savings and environmental benefits over the years.
Warranty

The Dux EcoSmart Electric Boosted Solar 400L system comes with a comprehensive warranty providing peace of mind for your investment. It includes a 7-year warranty on the tank, covering manufacturing defects and ensuring durability. The solar collectors have a 5-year warranty covering performance and efficiency issues. Additionally, there is a 1-year parts and labour warranty for any repairs during the first year. SunCity Hot Water supports you with any warranty claims or maintenance needs.
Frequently Asked Questions
How do I know if my home is suitable for solar hot water?
Factors such as roof orientation, shading, and space for solar panels need to be assessed. Our technicians at SunCity Hot Water can conduct a site evaluation to provide tailored recommendations.
Can the EcoSmart system be used in colder climates?
Yes, it can be used in colder climates. However, performance may vary depending on local conditions. The electric booster ensures access to hot water when solar heating is less effective.
How much can I save on my energy bills with this system?
By using solar energy, the EcoSmart system reduces reliance on conventional electricity, leading to savings on energy bills. Exact savings depend on household hot water use and local energy prices.
How does a solar hot water system work?
Roof-mounted solar collectors absorb heat from the sun and transfer it to the water in an insulated storage tank. An electric or gas booster tops up the temperature on cloudy days so you never run out of hot water.
Is there a government rebate for solar hot water systems?
Yes — eligible solar hot water systems qualify for Small-scale Technology Certificates (STCs), which reduce the upfront cost. SunCity Hot Water will confirm your eligibility and handle the paperwork.
How long do solar hot water systems last?
A well-maintained solar hot water system can last 15 years or more, with the tank and collector panels covered by manufacturer warranties.
How much do solar hot water systems cost?
Solar hot water systems cost more upfront than electric, but government STC rebates and much lower running costs offset this over time. Call SunCity Hot Water on 1300 728 122 for an all-inclusive quote on the Dux EcoSmart Electric Boosted Solar 400L.
What size hot water system do I need?
As a guide, 1–2 people suit 125–160L, 3–4 people (a family of four) suit 250–315L, and larger households suit 400L. Continuous-flow gas units are sized by hot water flow rate instead. SunCity will help size the right system for your household.
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