The latest industry report from SolarNerds.com.au (2025 Awards Edition) indicates that PSW Energy ranks highly in both solar panel and home battery installation capacity in Western Australia. Specifically, the company is the fourth top solar installer in WA for systems up to 100 kW, having installed 6,128 kW of solar capacity across 724 systems. Additionally, PSW Energy is the second top battery installer in WA, deploying 10,398 kWh of battery storage across 673 systems. These figures highlight PSW Energy’s role in WA’s renewable energy sector as a leading local provider and demonstrate the increasing trust homeowners place in reliable solar and storage solutions.
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Glimpse: kW and kWh's installed (WA)
- Top-Tier Across 3 out of 4 Segments: PSW Energy achieved top-5 rankings in the small (0–15 kW), medium (15–40 kW), and Battery system categories, confirming versatility across residential and small commercial projects.
- 2nd in Battery kWh's Installed: With 10,398 kWh of battery storage deployed across 673 systems, PSW ranked second in total residential battery installations.
- 4th in Solar PV Installations: PSW Energy installed 6,128 kW of solar capacity across 724 systems, securing the fourth-highest volume in WA for systems up to 100 kW.
In 2025, Western Australia’s solar market was both robust and mature. The state had installed 269,913 kW of solar PV capacity across 30,678 systems. To put that into perspective, this translates to about 30 megawatts of new solar energy added each month through rooftop and small commercial installations. WA’s solar installations accounted for approximately 10% of Australia’s total solar volume that year, which aligns with the state’s share of the country’s population, suggesting a well-established, saturated market.
In terms of battery storage, Western Australia saw the installation of 339,587 kWh across around 19,192 battery systems, representing about 9% of Australia’s total battery adoption for 2025. This growth demonstrates that thousands of households in WA adopted battery systems that year, highlighting a strong trend toward increased battery adoption in the state.
The system size distribution of new solar installations in Western Australia shows a strong emphasis on home installations: nearly 80% of installed capacity comes from systems of 15 kW or less. This indicates that in 2025, tens of thousands of WA homeowners installed solar panels on their rooftops, while only about 20% of the capacity came from larger commercial-scale setups. The predominance of systems under 15 kW reflects the crucial role that residential solar has played in Western Australia’s solar expansion.
The growth of the solar photovoltaic market appears to be stabilising. In 2025, there was a slight decline in installed photovoltaic kW, with total solar capacity installed 5.9% lower than the previous year. This suggests that WA’s solar boom is entering a mature phase, where most suitable rooftops already have solar panels, leading to a levelling off of annual installation volumes. For homeowners, this maturing market signifies that solar energy is no longer just a trend for early adopters but has become a mainstream home upgrade, with many experienced providers and proven technologies readily available.
The data reveals an important trend: batteries are quickly becoming a standard addition to new solar systems. In 2025, approximately 19,000 battery systems were installed alongside about 30,000 solar systems, indicating that many new solar adopters also invested in energy storage. The average battery installation in Western Australia had a capacity of around 17.7 kWh, which is notably large, equivalent to the energy storage of one and a half Tesla Powerwall 3 batteries.
This indicates that many households are opting for substantial storage solutions, often choosing multiple battery units or larger batteries to cover more of their nighttime energy usage. The increasing average battery size reflects a growing desire for energy independence, as homeowners seek batteries that can power more of their homes at night or during outages. In short, battery adoption in WA is on the rise, both in the number of installations and in storage capacity per household (kWh).
WA’s top solar installers in 2025
In Western Australia’s solar market, PSW Energy has established itself as one of the leading solar installers by installed capacity, kW and kWh. According to the SolarNerds.com.au report, PSW Energy (including Perth Solar Warehouse) was ranked 4th in the state for total solar PV capacity installed (for systems of 100 kW or less). In 2025, PSW installed 6,128 kW of solar panels across 724 projects, representing approximately 2.3% of Western Australia’s total installed solar capacity.
While 2.3% may seem small at first glance, it is significant given the large number of installers operating in WA, creating a highly fragmented market with hundreds of companies competing for business. Achieving a top-5 position indicates that PSW is handling a substantial volume of projects with Legendary-rated outcomes on SolarQuotes.com.au.
724 solar installations have an average system size of around 8.5 kW, indicating that PSW primarily serves the residential segment, where typical systems range from 5 to 10 kW. The success of PSW Energy is largely attributed to its commitment to helping homeowners transition to solar energy at scale while maintaining high quality. Being the 4th largest local solar company by installed capacity in Western Australia underscores PSW’s strong reputation and reach.
Impact more than volume
It’s about consistency across different project sizes. The report data shows that PSW Energy performed strongly in the prominent solar photovoltaic system size categories:
In the small-scale residential bracket (0–15 kW systems), PSW was among the top 5 installers in WA. This reflects PSW’s core strength in standard home solar installations.
In the medium-scale segment (15–40 kW, often small businesses or large homes), PSW ranked in the top 3 statewide. This is an impressive feat, demonstrating that PSW is not only a residential specialist but also highly capable with slightly larger, more complex systems (such as systems for schools, community centres or multi-unit properties)
Solar PV Results
SolarNerds.com.au uses source data derived from the Clean Energy Regulator’s (CER) Renewable Energy Certificate (REC) registry. 2025, annual data, Western Australia.
This overall performance positions PSW Energy as a versatile solar provider capable of serving a range of customers, from homeowners looking for a 6 kW rooftop system to businesses requiring a 100 kW array. This versatility is reassuring for customers, as the company’s experience spans multiple sectors and has been validated by a high volume of installations across different segments.
A leading charge in home battery storage
PSW Energy has demonstrated leadership in the battery storage sector. According to the 2025 SolarNerds report, the PSW ranked second in Western Australia for battery installations in 2025, trailing only one other provider in total installed battery capacity. In that year, PSW Energy (including Perth Solar Warehouse) deployed 10,398 kWh of batteries through 673 individual system installations. This achievement gave the combined PSW group approximately a 3.1% share of all battery storage capacity installed in Western Australia in 2025.
Notably, PSW Energy’s battery capacity installation was nearly equivalent to its solar capacity installation, with 10,398 kWh of storage compared to 6,128 kW of solar panels. Underscoring a commitment to integrating battery storage with solar energy.
PSW Energy’s approximate share of total WA installations in 2025 by capacity: about 2.3% of the state’s solar PV kilowatts and 3.1% of the state’s battery kilowatt-hours.
It is interesting that PSW’s 673 battery installations are closely aligned with its 724 solar installations, indicating that a significant number of solar customers in 2025 opted to add a battery. PSW has strongly advocated for solar-plus-storage solutions. By providing batteries alongside solar panels and educating customers about their benefits, PSW Energy is contributing to the increase in whole-home energy ecosystems across Western Australia.
For homeowners, this consolidated approach is invaluable, ensuring the solar system and battery are optimally sized and integrated, all managed by a locally proven installer’s expertise. This trend aligns with a broader movement: more homeowners are pairing solar energy with batteries to maximize self-consumption, reduce their reliance on the grid, and protect against blackouts.
A notable metric is the average size of each battery system installed by PSW. Dividing 10,398 kWh by 673 systems yields an average battery system capacity of approximately 15.5 kWh. While this is slightly below the West Australian state average of 17.7 kWh, it is still a significant increase compared to just a few years ago, when typical battery sizes ranged from 5 to 10 kWh.
An average size of over 15 kWh suggests that many PSW customers likely opted for multiple battery units or larger batteries for enhanced storage capacity. A common configuration might involve two 10 kWh batteries or one large battery around 15 kWh, allowing for overnight usage of solar energy and providing sufficient backup power.
The trend towards larger battery installations at PSW highlights a commitment to future-proofing homes, ensuring that customers have enough storage to cover evening energy consumption and accommodate potential electric vehicle needs in the coming years.
Battery Results
SolarNerds.com.au uses source data derived from the Clean Energy Regulator’s (CER) Renewable Energy Certificate (REC) registry. 2025, annual data, Western Australia.
PSW Energy’s second-place ranking in battery volume highlights the company’s strong reputation for reliable battery installations. Since batteries represent a significant investment and are a relatively new technology for many homeowners, choosing a trusted installer is essential. PSW‘s volume indicates that hundreds of residents in Western Australia chose PSW Energy or Perth Solar Warehouse to design and install their home battery systems in 2025. This decision likely stems from the company’s proven local expertise in solar energy and its technical knowledge of energy storage products from popular brands such as Tesla, Sigenergy, and Goodwe.
This leadership in battery installations not only enhances PSW‘s business but also contributes significantly to Western Australia’s transition to a more resilient and distributed energy grid. Each battery installed plays a vital role in reducing evening peak demand and increasing grid stability by utilising stored solar energy.
What these figures mean for homeowners
For current and prospective solar homeowners in Western Australia, the figures from the 2025 report provide insights into the state’s renewable energy journey, along with considerations for maximising solar energy in 2026 and beyond.
Solar is mainstream in WA:
In 2025 alone, over 30,000 solar systems were installed in Western Australia, with nearly 80% being home-sized systems. This variation demonstrates that rooftop solar technology is now widely adopted and well-established in the region. Your suburb likely has many homes equipped with solar panels, and many of your neighbours have already made the switch to solar energy.
This widespread adoption means new solar customers can feel confident in the technology’s reliability, thanks to the wealth of local installation expertise. The slight slowdown in growth, only a 5.9% decline from 2024, indicates that the solar market is no longer a “gold rush” but rather a stable industry. This stability allows customers to prioritise choosing a quality system and installer without the pressure of intense demand spikes.
Battery storage is on the rise:
Recent data reveals a significant increase in the adoption of home battery systems. In 2025, for every three households that installed solar panels, approximately two also opted for a battery system. This trend is expected to continue as battery prices decrease and electricity tariffs make it more appealing to store solar energy.
For homeowners, this means it’s becoming increasingly sensible to consider adding a battery when installing solar panels or incorporating one into an existing solar array. The benefits include the ability to use solar power at night, increased energy independence, and better protection against blackouts.
In Western Australia, the average battery size is around 17 kWh, indicating that many users are choosing batteries capable of meeting most of their nighttime energy needs. This trend suggests that the technology is providing genuine lifestyle enhancements and cost-saving benefits, rather than just serving as a backup for a few appliances.
Choosing a proven installer matters:
As the solar industry matures, a clear track record of installers has emerged. Companies such as PSW Energy, which accounted for a significant portion of solar and battery installations in Western Australia in 2025, have gained extensive experience and valuable customer feedback. PSW’s top-five ranking in both solar and battery installations is a strong indicator of its reliability and the trust it has earned from customers.
As a homeowner, selecting a highly ranked or award-winning installer, known for either quality or volume, can offer peace of mind. These installers have shown they can handle high volumes while maintaining quality standards, and they are likely to remain in business long enough to honour warranties and provide ongoing support. In short, choosing industry leaders like PSW Energy is a safer investment for your solar and battery needs.
Solar + storage is the new normal:
The report highlights that solar energy and battery storage are becoming essential components of Western Australia’s residential energy landscape. If you’re thinking about installing solar panels, it’s a good idea to plan for battery storage as well. Even if you don’t install a battery right away, opting for battery-ready equipment or working with a knowledgeable installer, such as PSW, will make it easier to add a battery later.
The fact that nearly all of PSW’s solar customers opted for batteries in 2025 demonstrates that combining solar panels and batteries is a viable and scalable solution. Homeowners are increasingly seeing solar panels and batteries as a complete package—collecting energy during the day and storing it for nighttime use. This approach maximises self-sufficiency and provides protection against rising electricity costs.
Collective progress in WA’s renewable journey:
The numbers reveal a significant story about Western Australia’s progress in renewable energy. Over the previous year, providers across the state collectively installed approximately 270 MW of solar power and 340 MWh of battery storage. This transformation means that each year, a larger proportion of our energy comes from local rooftops rather than centralised power stations.
As one of the top installers, PSW Energy, along with Perth Solar Warehouse, has played a crucial role in this transition, helping thousands of households convert to clean energy. For the community, this shift results in reduced carbon emissions, a more resilient energy grid, and the creation of local clean-tech jobs.
For individual homeowners, you are not alone in your solar journey; you are part of a rapidly growing community of over 30,000 WA households each year that are choosing a sustainable energy lifestyle. Companies like PSW Energy are here to guide and support this collective effort, ensuring that transitioning to solar power (and adding battery storage) is a positive and empowering experience for families throughout the state.
Key takeaways
- Most new solar installations in Western Australia consist of home-sized systems. Nearly 80% of the solar capacity added in 2025 came from systems under 15 kW, which are typical for residential setups. Small systems remain the standard, meaning an average homeowner’s 5–10 kW array is a common choice.
- Battery adoption is also increasing rapidly. In 2025, two-thirds of new solar homes in WA installed batteries, with an average battery capacity of about 17.7 kWh, sufficient to power essential evening loads. If you’re considering solar, it’s wise to include a battery to future-proof your investment and maximise your savings.
- PSW Energy is a recognised leader in solar and storage solutions. The company ranked fourth in WA for solar installations and second for battery installations, demonstrating experience. An installer with this level of achievement has a proven track record of reliability, quality service, and industry expertise.
- WA’s solar market is mature and competitive. With tens of thousands of installations each year and a slight easing in growth, homeowners have a greater choice. Take the time to compare reputable installers, equipment quality, and long-term support options. The best providers stand out through awards or volume rankings by consistently delivering value and ensuring customer satisfaction.
- Solar power represents a collective success in WA. By choosing to go solar (and adding a battery), you’re joining a large community that is advancing Western Australia toward a cleaner energy future. Each installation, including the thousands completed by PSW Energy and others, contributes to lower emissions and a more resilient grid. By opting for solar, especially with a trusted installer, you become part of WA’s renewable energy success story, enjoying personal benefits while supporting statewide progress.
Interpreting the 2025 Solar Nerds report alongside PSW Energy’s performance, homeowners in Western Australia can see the benefits of investing in solar and battery technology. These benefits include savings, reliable backup power, and increased home value, as well as broader implications such as environmental impact and energy independence. The message is: solar energy is thriving in Western Australia. With experienced providers like PSW Energy leading the way, there is now more data-backed confidence than ever that choosing to go solar with storage is a wise and rewarding decision for your home.
Reference
SolarNerds.com.au: Solaris Awards 2025 WA download
SolarNerds.com.au: PSW Energy is a Top 5 Solar & Battery Installer
PSW Energy: Top 5 solar & battery installer in WA — Solaris Awards 2025
