
Off-Grid Solar System Sizing: What Happens If You Undersize It?
Find out why off-grid solar system sizing matters, what can go wrong if your system is too small and how to plan reliable solar, battery and inverter capacity.
Reduce your carbon footprint, lower your electricity bills, and enjoy the benefits of clean energy with a high-efficiency solar power system designed for your home.
Soaring energy costs can take a toll on your budget, but there is an affordable solution. By harnessing the power of solar PV technology, you can generate your own power, reduce your reliance on the grid, and enjoy long-term bill savings with a rooftop solar installation tailored to your system size and energy needs.
Thousands of families in the Nepean, Hawkesbury, and Blue Mountains have switched solar, experiencing significant savings with high-efficiency solar power systems. Whether you’re looking for a 5kW solar system or a 6.6kW system, we design and install the ideal solution for your household.
Discover real stories and see the impressive before-and-after results of their energy costs.
Mosman NSW 2088
24.84kW System
54 × 460W REA Power FUSION-R Panels
54 x Enphase Microinverters
Mt Riverview NSW 2774
10.29KW System
21 × 490W AIKO Solar Neostar Panels
1 × Sigenergy SigenStor Inverter
1 × Sigenergy SigenStor Battery
Blaxland, NSW 2774
Glenmore Park, NSW 2745
6kW System
14 x REA HD108N Series 440W Panels
ENPHASE IQ8AC Micro Inverters
Wallacia, NSW 2745
22.88kW Solar System
48.36kWh Battery Storage (6 x Sigenergy 8.0 units)
52 × 440W Trina Solar Vertex S+
1 × Sungrow Inverter
1 x Sigenergy SigenStor Inverter
Glenmore Park, NSW 2745
10.12kW Solar System
24.18kWh Battery Storage (3 × Sigenergy 8.0 units)
23 × 440W Trina Solar Vertex S+ Panels
1 × Sigenergy SigenStor Inverter
Blackheath, NSW 2785
11.44kW Solar System
32.24kWh Battery Storage (4 x Sigenergy 8.0 units)
26 Trina Solar Vertex S+ Panels
26 Enphase IQ8HC Microinverters
1 x Sigenergy SigenStor 10kW hybrid system
Katoomba, NSW 2780
33.44kW Solar System
35kWh Battery Storage
76 x Trina Solar Vertex S+ Panels
1 x Sungrow Inverter
1 x Sungrow 35kWh Battery
Lawson, NSW 2783
Katoomba, NSW 2780
Hazelbrook, NSW 2779
17.6kW Solar System
25.6kWh Battery Storage
40 x Trina Solar Vertex S+ Panels
1 x Sungrow Residential Inverter
1 x Sungrow SBR256 Battery
Katoomba, NSW 2780
Family-owned and operated by Chris and Kate Avery, we specialise in solar panel installation, focusing on energy efficiency, innovative design, and cost-effective solutions.
We are proudly family owned and operated, providing a reliable, professional service to the Penrith, Nepean, Hawkesbury and Blue Mountains.
With over 20 years’ experience in the electrical industry, we ensure expert workmanship and peace of mind. Since 2018, we have installed over 1,000 solar power systems for homes and businesses.
We follow industry best practices and use Clean Energy Council-approved solar products for long-lasting performance. Learn more about solar accreditation and standards from the Clean Energy Council.
We conduct on-site visits to assess your energy usage, typical home requirements, and system size, ensuring you get the best solar panels for your needs.
With the rising cost of living, homeowners face higher energy bills, increased carbon footprints, and dependence on fossil fuels.
Investing in a rooftop solar system is a key factor in reducing household expenses while contributing to a sustainable future.

Solar energy offers a cost-effective alternative that not only provides immediate savings but also serves as a long-term investment. Think of solar as a smart financial move with significant returns.
Installing a home solar system allows you to generate your own power, cutting your electricity costs significantly.
By switching to solar, you reduce your reliance on fossil fuels and contribute to a cleaner, greener future.
Our solar panels and inverters come with a solid performance warranty, ensuring efficiency and reliability for years to come.
Homes with solar panels often have higher property values and sell faster, attracting eco-conscious buyers.
Solar panels require minimal upkeep, providing long-term financial benefits due to their durability.
Generate your own electricity, reducing reliance on the grid and protecting against rising energy costs.
At Avery Solar & Electrical, we proudly serve a wide range of communities across the Blue Mountains, Penrith, and Hawkesbury regions. Our commitment is to provide best-practice solar and electrical services tailored to the unique needs of each area.

Find out why off-grid solar system sizing matters, what can go wrong if your system is too small and how to plan reliable solar, battery and inverter capacity.

Learn how to choose the right solar battery size for your home, including what affects capacity, backup power and long-term savings.

Battery storage is transforming how Australian homes use energy. Learn how home batteries reduce reliance on the grid, maximise solar power and protect against rising electricity prices and outages.
Get in touch, and we'll schedule a complimentary on-site assessment to evaluate your roof space, review your past energy bills, and discuss your solar requirements.
Our team will design and install the perfect solar system tailored to your energy usage, allowing you to start saving money immediately.
Experience the peace of mind that comes with a high-quality solar panel system installed by the expert teaml, ensuring reliable performance for years to come.
Most homeowners see a return on investment within 3 to 5 years. Thanks to government rebates and rising power prices, the payback period for solar in NSW has never been shorter.
📝 Learn more: Understanding the ROI of Solar Panels in the Blue Mountains
Yes. Despite seasonal changes and occasional fog or cloud cover, the Blue Mountains receive plenty of sunlight throughout the year. Solar systems installed by Avery Solar are optimised to perform efficiently in our local climate conditions.
For most households, a 6.6kW system is the sweet spot for maximising self-consumption and savings. However, system size will depend on your past electricity bills, roof size, and future energy needs (e.g. EV charging).
📞 Book your free on-site quote to get a tailored system recommendation.
Yes. NSW homeowners can access Small-scale Technology Certificates (STCs), which reduce the upfront cost of installation. Additional rebates are available if you add a solar battery or join a Virtual Power Plant (VPP).
🔍 See: Solar Battery Rebate 2025: What It Means for Blue Mountains Homeowners
Yes. Properties with solar panels often sell faster and at a premium. Studies show buyers are willing to pay more for homes with lower energy bills and eco-friendly features.
We only use trusted, Clean Energy Council-approved brands such as SUNGROW, Enphase. Our systems are designed for reliability, longevity, and maximum efficiency.
Absolutely. Our systems are battery-ready, making it easy to add a Tesla Powerwall, Enphase IQ Battery, or other storage solution in the future—no major system changes needed.
🧠 More info: Is a Solar Battery Worth It?
In most cases, council approval is not required for residential rooftop systems. However, if your property is heritage-listed or in a conservation area, it’s best to check with your local council or contact us for advice.
Most installations are completed within 1 to 2 days depending on system size and site conditions. We’ll assess everything during your free on-site quote to ensure a smooth process.
🧠 More info: Installation Day page.
Support local business with quality you can trust. We offer cost-effective solutions using the industry’s best solar and electrical products, mostly sourced from local retailers and trade suppliers—no cheap imports or knock-offs here!
Fill out the form, and we’ll give you a call.
To learn more or arrange the installation of residential solar systems across the Blue Mountains, Penrith and Hawkesbury NSW, contact Avery Solar & Electrical on 02 4720 6300 or email info@averyse.com.au.