Installing a modern solar and battery system is one of the best ways for homeowners to lower their electricity bills, become more energy independent, and use clean, renewable energy from the sun.
This case study looks at a home in Castle Hill, New South Wales (NSW 2154), where a 7.35kW solar and battery system has been installed. The system is designed to help the homeowner save money on power bills while also using solar energy more efficiently throughout the day and night.
The system uses high-quality solar panels from AIKO Solar, along with a Fox ESS inverter and battery system. It also includes Tigo Energy optimisers, which help each solar panel perform better, especially when parts of the roof are shaded during the day.
Together, these components work as one smart system. It produces solar power during the day, stores excess energy in the battery and allows the home to use stored energy when needed. This reduces reliance on the electricity grid and helps the homeowner enjoy more stable and cost-effective energy use.
1. Rising electricity costs in NSW
Electricity prices in New South Wales continue to rise and many families are now paying higher power bills. Because of this, homeowners like Josephine in Castle Hill are looking for ways to reduce their energy costs.
A solar and battery system helps solve this problem. It allows the home to produce its own electricity during the day using sunlight. Any extra energy that is not used immediately is stored in a battery instead of being wasted.
Later in the evening, when electricity prices are higher, the home can use this stored solar energy instead of buying expensive power from the grid. This helps lower electricity bills and gives the homeowner more control over their energy use.
2. Maximising solar self-consumption
Without a battery, most of the solar energy produced during the day can go unused.
With a battery like the Fox ESS EQ4800-L6, the extra solar energy is stored instead of being wasted. This stored energy can then be used later.
This means the home can use more of its own solar power, especially in the evening and during peak hours. It helps reduce electricity bills and makes better use of the solar energy generated during the day.
3. Improving energy independence
A key reason for this installation was to help the homeowner become more energy independent. This means the home can use more of its own solar power instead of relying on electricity from the grid.
With a battery and inverter system, the home can store extra solar energy during the day and use it later when needed, such as in the evening.
The system includes the Fox ESS KH10 hybrid inverter.It controls how solar power is used in the home, how much is stored in the battery, and when stored energy is used.
This helps the home rely less on the grid, use solar power more effectively and have better control over energy use.
4. Roof complexity and shading management
The home is a double-storey property with a tiled roof and multiple roof angles.Tigo Energy optimisers were installed, allowing each panel to work independently. If one panel is shaded or not performing at its best, it does not affect the performance of the other panels.
This ensures the solar system continues to produce as much energy as possible throughout the day. It improves overall efficiency, especially on complex roofs like this one and helps the homeowner achieve better long-term energy output from the system.
This is a carefully designed 7.35kW residential solar and battery system built for performance, safety, and future scalability, ensuring the homeowner achieves reliable energy savings for many years.
Solar PV System – The solar system includes 15 × AIKO Neostar 3P 490W solar panels, with a total system size of 7.35kW. This size is well suited to an Australian home, helping generate enough electricity to support daily energy needs such as lighting, appliances and general household usage.
These are high-efficiency mono crystalline solar panels, designed to convert more sunlight into usable electricity. This allows the system to produce strong output even when roof space is limited.
The system is also designed to perform well in Australian weather conditions, including hot summers, cloudy days, and varying sunlight levels throughout the year.
AIKO Solar panels are known for their high efficiency, excellent low-light performance, and long-term reliability. This makes them a strong choice for residential rooftops, where consistent performance and durability are important for long-term savings and energy independence.
Inverter System – The system includes a Fox ESS KH10 Hybrid Inverter, designed for a single-phase home. It is built to manage both solar power and battery storage in one system, ensuring smooth and efficient operation.
It manages the flow of electricity between the solar panels, battery, and the home, ensuring energy is used in the most efficient way at all times. This helps improve efficiency, reduce electricity costs, and maximise the use of solar energy produced.
Battery Storage System – The system includes a Fox ESS EQ4800-L6 lithium battery designed for a single-phase home setup. It is built to safely store solar energy and deliver reliable performance for everyday use.
This battery stores extra solar energy produced during the day, so it can be used later when needed. Instead of relying on the grid, the home can use stored energy in the evening, at night, or during high-demand periods.
It also provides backup functionality, meaning it can supply power to the home during power outages, and help keep essential appliances running.
The battery helps improve energy efficiency by making better use of the solar power generated during the day. It also helps reduce electricity bills and gives the homeowner greater control over when and how energy is used.
Power Optimisation Technology – The system includes 3 × Tigo optimisers, installed on solar panels to improve overall performance.
These optimisers help panels operate more efficiently, especially if parts of the roof experience shading during the day. They also reduce mismatch losses, which can occur when one panel performs at a lower level than the others and affects the overall system output.
This is especially useful for homes with multi-angle roofs, like this double-storey property. It helps the system produce more energy throughout the day and ensures better overall performance and efficiency.
Safety & Compliance Features – Safety is very important in solar and battery systems, especially when a battery and backup power are included.
This system includes backup functionality, meaning the home can still have power during outages for essential appliances.
The installation also takes home insurance requirements into account, ensuring the system meets the required standards.
All work has been completed in accordance with Australian safety standards and guidelines.
1. Site assessment and system design
The installation process began with a detailed site inspection of the Castle Hill property. Key factors considered included
Roof orientation and tilt – To check which direction the roof faces and its angle. It helps determine how much sunlight the panels can receive throughout the day.
Shading from surrounding structures – To look at whether trees, buildings, or parts of the roof block sunlight at different times of the day. This helps avoid placing panels in low-sunlight areas.
Energy consumption patterns – This means understanding how much electricity the home uses and when it is used most. This helps size the system correctly for the household’s needs.
Space for inverter and battery placement – To check where the inverter and battery can be safely installed. It ensures there is enough space, proper ventilation, and easy access.
This assessment helps determine the optimal placement for solar panels and battery equipment.
2. System sizing (7.35kW)
A 7.35kW solar system was selected based on the home’s electricity usage and available roof space.
Large enough to offset most daytime energy use – The system can produce enough electricity during the day to run most household appliances.
Sufficient excess generation for battery charging – Any extra solar power not used in the home during the day can be stored in the battery for later use.
Scalable for future energy expansion – The system is designed to allow future upgrades if the household requires more power, such as adding more panels or increasing battery capacity.
3. Installation process
Solar panel installation – 15 x AIKO panels were installed across the tiled roof using secure mounting systems designed for Australian wind conditions.
Inverter installation – Fox ESS KH10 inverter was installed in a well-ventilated external location to ensure safety and efficient performance.
Battery installation – Fox ESS EQ4800-L6 battery was installed near the hot water system area, approximately 24 metres from the main switchboard, with dedicated backup cabling.
Optimiser installation – 3 x Tigo optimisers were installed on panels most affected by shading to ensure consistent system performance.
4. Backup power integration
The system includes backup functionality, allowing essential circuits to remain powered during grid outages.
This ensures improved energy reliability and peace of mind for homeowners during unexpected disruptions.
5. Testing and commissioning
Once the installation was completed, the system underwent –
Electrical safety testing – All wiring and connections were checked to ensure the system is safe and free from electrical issues.
Inverter setup and monitoring – The inverter was configured with the correct settings to ensure proper operation. It was also connected to a monitoring app so the homeowner can track solar and battery performance.
Battery testing – The battery was tested to ensure it charges from solar power and discharges energy when required.
Testing under load – The system was tested under normal household power usage to confirm everything operates smoothly and efficiently.
Final step – Grid connection
After all tests are completed and passed, the system is approved and connected to the electricity grid, making it ready for use.
Once installed and commissioned, the system begins delivering immediate benefits –
Solar generation begins – From the first day, your solar panels start producing electricity from sunlight. This power can be used in the home immediately, reducing reliance on the grid.
Battery optimisation improves usage patterns – The battery begins charging and discharging at the most efficient times, helping store more solar energy and reduce grid consumption.
Noticeable reduction in electricity bills – By the end of the first month, a reduction in electricity bills is usually visible. This is due to increased use of self-generated solar energy instead of grid power.
Long-term Increased return on investment and energy independence – Over time, the system helps offset its own cost through energy savings. The homeowner becomes less dependent on electricity retailers and gains greater control over energy use, resulting in long-term financial benefits and improved energy independence.
Reduced electricity bills – The combination of solar panels and battery storage reduces reliance on grid electricity, especially during peak pricing periods.
Smarter energy usage – Energy is automatically stored and used when needed most, reducing waste and improving efficiency.
Improved property value – Homes with solar and battery systems are increasingly attractive to buyers due to long-term energy savings.
Reliable energy backup – The backup functionality provides additional security during unexpected grid outages.
Installed by RK Solar
This solar and battery system was professionally designed and installed by RK Solar, specialists in residential and commercial solar solutions in New South Wales.
At RK Solar, we focus on delivering high-performance solar and battery systems that help homeowners reduce electricity bills, improve energy independence and maximise long-term savings.
From system design to installation, testing and grid connection, our team ensures every project is completed with quality workmanship, safety, and full compliance.
Contact RK Solar
Interested in installing a solar and battery system for your home or business?
Call us -(02) 9659 1034
Email – info@rksolar.net
Get in touch with RK Solar today for a free consultation and a customised solar and battery solution tailored to your energy needs.
Our team can help you choose the right solar system, battery storage and energy solutions.
Copyright © RKS Energy Solutions | All rights reserved
