Maximise Your Solar Savings with a SOLAX Home Battery System

For WA homeowners, investing in a home battery system is becoming one of the smartest ways to maximise the value of rooftop solar. Instead of exporting excess solar energy to the grid for relatively low feed-in tariffs, a solar battery storage system allows you to store surplus electricity generated during the day and use it during the evening, overnight, or whenever your home needs it most.

By storing your own renewable energy, you can significantly reduce electricity bills, minimise reliance on the grid, and increase your energy independence. A quality home battery system in Australia also provides greater energy resilience, helping your household maintain power during grid outages (where backup functionality is installed) while making your solar investment deliver stronger long-term financial returns.

The SolaX X1-VAST inverter paired with the HS51 battery system offers a powerful, efficient, and future-ready solar battery solution for Australian homes. Engineered for high conversion efficiency, intelligent energy management, and advanced safety protection, the system is designed to maximise self-consumption of your solar energy while delivering reliable everyday performance.

With flexible battery expansion options, seamless integration with new or existing solar systems, and eligibility for available Australian solar battery rebates and incentives (subject to program requirements), the SolaX X1-VAST and HS51 battery combination provides homeowners with a scalable and cost-effective energy storage solution that is built for today's energy needs and tomorrow's electricity demands.

High-Efficiency Solar Battery Performance for Australian Homes

When investing in a solar battery system, efficiency is just as important as battery capacity. A high-performance system doesn't simply store excess solar energy, it helps your entire solar system generate more electricity, use it more effectively, and deliver greater long-term savings.

The SolaX X1-VAST inverter paired with the HS51 battery has been engineered to perform exceptionally well in Australia's diverse climate and rooftop conditions. Its advanced technology enables homeowners to capture more solar energy throughout the day, increasing self-consumption and reducing reliance on expensive grid electricity.

Key performance advantages include:

Four independent MPPT trackers, allowing the system to optimise energy production from multiple roof orientations and minimise losses caused by shading or complex roof designs.

Up to 200% PV oversizing capability, enabling more solar panels to be connected so your system can harvest additional solar energy without compromising performance.

A low 50V start-up voltage, allowing the inverter to begin generating electricity earlier in the morning and continue operating later into the afternoon, extending your daily solar production.

Together, these advanced features can increase total solar energy generation by up to 26.7% compared with conventional residential solar systems. That means more clean energy available to power your home, charge your home battery, and reduce your electricity bills, helping you maximise the return on your solar investment while improving your home's energy independence.

Flexible Battery Storage That Grows with Your Home

Your household's energy needs are unlikely to stay the same. As more Australian families install electric vehicle (EV) chargers, add air conditioning, switch to electric appliances, or increase their overall electricity usage, having a solar battery system that can grow with you becomes increasingly important.

The SolaX HS51 battery, paired with the X1-VAST inverter, has been designed with future expansion in mind. Rather than replacing your entire battery system as your energy requirements increase, you can simply expand your storage capacity when needed, making it a smarter long-term investment.

Key benefits include:

Scalable battery storage with dual battery ports, allowing additional battery modules to be added as your household energy demands grow.

Flexible expansion, with support for both new and existing battery modules, helping protect your original investment.

Simple system upgrades, enabling homeowners to increase storage capacity without replacing the entire battery system.

Following an expansion, the system automatically balances the battery modules in approximately three hours, helping maintain consistent performance and maximise usable battery capacity. Over the lifetime of the system, this intelligent battery management can improve available storage capacity by around 10%, ensuring your home battery continues to operate efficiently for years to come.

Request Your SolaX Battery Installation Quote

Ready to transform your home energy independence with a premium SolaX battery system? Fusion Sun Solar brings years of specialized experience in SolaX installations across Perth, ensuring your investment delivers maximum performance and reliability.

We will recommend the optimal SolaX battery configuration, taking into account your roof orientation, existing solar setup, household energy usage, and future expansion plans.

Receive detailed pricing with no hidden costs, including equipment, installation, permits, grid connection, and comprehensive warranty coverage.

To get started, simply fill out this form. Our team will be in touch to guide you through the complete SolaX Power Battery installation process.

Built for Today's Homes and Tomorrow's Energy Needs

Modern homes require more than just a battery, they need a complete home energy storage system that can adapt to changing lifestyles and emerging technologies.

The SolaX X1-VAST has been designed to support a wide range of residential energy applications, including:

Off-grid capability for remote properties or homes seeking greater energy independence.

Generator compatibility, providing an additional layer of backup power during extended outages.

Microgrid integration, allowing compatibility with selected third-party energy management systems.

AC-coupled battery retrofits, making it easy to add battery storage to many existing solar systems without replacing your current solar panels.

The system is also V2X (Vehicle-to-Everything) ready, providing the flexibility to integrate with future electric vehicle technologies as Australia's home energy landscape continues to evolve.

More Battery Capacity for Greater Energy Independence

One of the biggest advantages of the HS51 battery system is its ability to provide significantly more storage than many standard residential battery solutions.

While many home battery systems in Australia offer between 25 kWh and 30 kWh of storage, the HS51 can be expanded to an impressive 40.8 kWh using up to eight battery modules. This makes it an ideal solution for larger households, homes with high electricity consumption, or families planning for future energy needs.

The additional storage capacity allows homeowners to:

Store more excess solar energy instead of exporting it to the grid.

Power more of the home during the evening and overnight.

Extend backup power during grid outages (where backup circuits are installed).

Reduce reliance on expensive grid electricity.

Increase long-term energy independence and maximise the value of their solar investment.

SolaX HS51 Battery System Data

No. of Modules

2 to 13 Modules

Nominal Energy

10.2 to 66.5 kWh

Usable Energy

9.2 to 59.9 kWh

Battery Chemistry

LFP (LiFePO₄)

Cycle Life

>6000 Cycles

Nominal Voltage

102.4 to 665.6 V

Max Charge / Discharge Current

70 A

Ingress Protection

IP65

Operating Temperature

-30°C to +55°C

Communication

CAN / RS485

Download Datasheet

SolaX X1-VAST inverter Data

Power Range

5 kW to 10 kW

Max. PV Array Power

7.5 to 20 kWp

MPPT Trackers

3 or 4 MPPTs

Operating Voltage

40 to 560 V

Max. PV Input Voltage

600 V

Max. Input Current

20 A per MPPT

Battery Voltage Range

90 to 750 V

Peak EPS Output

200% for 10 Seconds

Dimensions [mm]

590 × 400 × 180

Weight [kg]

28 ± 2 kg

Download Datasheet

Simplified Whole-Home Backup

Power outages can happen without warning, making reliable backup power an increasingly valuable feature for Australian homeowners.

Unlike many conventional solar battery systems that require additional external switching equipment to provide whole-home backup, the SolaX X1-VAST and HS51 battery system has been designed with a simplified backup architecture. This reduces installation complexity while making it easier to keep essential household circuits or even the entire home, depending on system design and installation requirements powered during an outage.

The result is a cleaner, more streamlined energy storage solution that delivers greater peace of mind, improved reliability, and uninterrupted access to your stored solar energy when you need it most.

Frequently Asked Questions - SolaX X1-VAST & HS51 Home Battery System

What are the benefits of installing a SolaX home battery system?

A SolaX home battery system allows you to store excess electricity generated by your solar panels during the day and use it when the sun isn't shining. This helps reduce your electricity bills, increase your solar self-consumption, minimise reliance on the grid, and provide backup power during outages (when backup functionality is installed). For many Australian homeowners, it's one of the most effective ways to maximise the return on their solar investment.

Is a SolaX battery worth it for homes in Western Australia?

Yes. With relatively low feed-in tariffs and rising electricity prices across WA, storing your excess solar energy is often more valuable than exporting it to the grid. A SolaX battery allows you to use more of your own solar energy, helping reduce ongoing electricity costs while increasing energy independence.

How much can I save with a SolaX home battery?

Your savings depend on your electricity usage, solar system size, battery capacity and retailer tariffs. Many homeowners can significantly reduce evening electricity purchases by storing excess daytime solar generation, resulting in lower power bills and improved long-term savings.

Can the SolaX X1-VAST work with my existing solar system?

Yes. The SolaX X1-VAST supports AC-coupled battery retrofits, making it suitable for many existing solar installations. In many cases, homeowners can add battery storage without replacing their existing solar panels.

What is the maximum battery capacity of the SolaX HS51 system?

The HS51 battery system can be expanded up to 40.8 kWh, making it suitable for larger homes, high-energy households and customers wanting greater overnight storage and backup capability.

What is the maximum battery capacity of the SolaX HS51 system?

The HS51 battery system can be expanded up to 40.8 kWh, making it suitable for larger homes, high-energy households and customers wanting greater overnight storage and backup capability.

Does the SolaX battery provide backup power during blackouts?

Yes. When configured with backup circuits during installation, the SolaX X1-VAST and HS51 battery system can continue supplying stored energy during a grid outage, helping keep essential appliances and in some installations, the entire home running safely.

How does the SolaX X1-VAST improve solar performance?

The X1-VAST inverter includes four independent MPPT trackers, supports up to 200% solar panel oversizing and has a low 50V start-up voltage. These features allow your system to generate electricity earlier in the morning, continue producing later in the afternoon, and maximise energy production across multiple roof orientations.

Why are four MPPT trackers important?

Four MPPT (Maximum Power Point Tracking) inputs allow solar panels installed on different roof sections to operate independently. This improves performance on homes with multiple roof directions or partial shading, helping generate more solar energy throughout the day.

Can I install more solar panels than my inverter size?

Yes. The SolaX X1-VAST supports up to 200% PV oversizing, allowing homeowners to connect more solar panels than the inverter's nominal rating. This helps maximise solar generation, particularly during winter and cloudy conditions.

Is the SolaX battery suitable for future electric vehicle charging?

Yes. The system is designed to grow with your household and is V2X-ready, meaning it has been designed to support future electric vehicle energy integration as technology develops.

Can the battery be used for off-grid homes?

Yes. The SolaX X1-VAST supports off-grid operation, making it suitable for remote properties or homeowners seeking greater energy independence when paired with an appropriately designed solar and battery system.

Can I connect a generator to the SolaX battery system?

Yes. The X1-VAST supports generator integration, providing an additional source of backup power during extended outages or for properties requiring enhanced energy security.

How does battery expansion work?

When additional HS51 battery modules are installed, the system automatically balances all battery modules to optimise performance. This intelligent battery management helps maximise usable battery capacity while maintaining consistent operation across the entire battery system.

Is the SolaX battery a good choice for large households?

Yes. Homes with higher electricity usage, multiple air conditioners, electric hot water systems, swimming pools or EV chargers can particularly benefit from the HS51's expandable storage capacity and high-performance inverter technology.

Will a battery reduce my reliance on the electricity grid?

Yes. A battery stores excess solar power generated during the day so you can use it during the evening and overnight instead of purchasing electricity from the grid. This increases your home's energy independence and reduces exposure to rising electricity prices.

Is the SolaX X1-VAST compatible with different roof layouts?

Yes. Thanks to its four independent MPPT trackers, the system performs exceptionally well on homes with multiple roof orientations, complex roof designs and partial shading.

Why should I choose Fusion Sun Solar for my SolaX battery installation?

Fusion Sun Solar provides tailored battery recommendations based on your home's electricity usage, roof layout and future energy needs. Rather than simply recommending the largest battery available, we help you choose the right-sized solution to maximise savings, improve energy independence and achieve the best long-term return on investment.

How do I know what battery size is right for my home?

The ideal battery size depends on several factors, including your daily electricity consumption, solar system size, evening energy usage, future plans (such as purchasing an EV), and your budget. At Fusion Sun Solar, we perform a personalised energy assessment to recommend the battery capacity that delivers the best balance between upfront investment and long-term savings.

Should I install a battery at the same time as my new solar system?

In most cases, yes. Installing a battery with your new solar system allows both systems to be designed to work together from day one, often reducing installation costs while maximising your solar self-consumption and long-term savings. It also future-proofs your home against rising electricity prices and growing energy demands.

What Makes the SolaX X1-VAST and HS51 Battery Different?

Unlike many residential battery systems, the SolaX X1-VAST and HS51 combine high-efficiency solar conversion, four independent MPPT trackers, expandable battery storage up to 40.8 kWh, simplified whole-home backup, generator compatibility and future-ready EV integration. This allows homeowners to generate more solar energy, store more electricity, reduce grid reliance and adapt their energy system as household needs change.