Commercial Solar Perth WA: Reducing Energy Costs for Businesses in Western Australia

Rising Energy Costs Across Western Australia

Western Australia’s climate presents unique energy challenges. Longer, hotter summers are driving increased electricity demand across Perth WA and regional areas, placing pressure on businesses through rising power costs and peak demand charges.

For many organisations, energy is now one of the most volatile operating expenses. Managing these costs has become a critical part of maintaining profitability and operational stability.

According to the Australian Energy Market Operator, demand across the South West Interconnected System (SWIS) continues to increase during extreme heat events, placing additional strain on infrastructure.

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Commercial Solar as a Strategic Cost Solution

Commercial solar in Perth WA offers a practical and scalable solution for businesses looking to reduce their reliance on grid electricity.

Large-scale solar installations generate peak energy during daylight hours, aligning directly with periods of highest demand, particularly for cooling systems in commercial and industrial environments.

For businesses across Western Australia, commercial solar can:

• Reduce electricity costs
• Lower peak demand charges
• Improve energy budgeting certainty
• Reduce Scope 2 emissions
• Strengthen ESG performance

Explore our commercial solutions. Distributed solar generation also supports grid stability by reducing demand on centralised energy infrastructure during peak periods.

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The Role of Large-Scale Solar Installations in WA

Large-scale solar installations in WA are increasingly being adopted by commercial and industrial operators seeking long-term energy certainty.

Whether delivered through ownership models or Solar PPA structures, these systems provide predictable energy pricing and strong long-term return on investment.

Learn more about how large-scale systems are evolving globally via the International Energy Agency.

A well-designed system becomes a long-term asset, not just a cost-saving measure.

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Why Businesses Choose a Commercial Solar Company in Perth

Choosing the right commercial solar company in Perth is critical to ensuring system performance and long-term reliability.

Westsun Energy is a leading provider of commercial solar in Western Australia, delivering full-service Engineering, Procurement & Construction (EPC) solutions.

Our approach includes:

• Engineering Excellence
• Tier 1 Procurement
• Professional Construction
• Ongoing Maintenance

View recent projects. This end-to-end EPC model ensures complete control across every stage of delivery.

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Long-Term Value of Commercial Solar in Western Australia

Commercial solar systems are now a strategic investment for businesses across Perth WA and regional Western Australia.

They provide:

• Long-term cost stability
• Reduced exposure to energy price volatility
• Improved sustainability outcomes
• Increased asset value

As energy markets continue to shift, solar gives businesses greater control over operating costs.

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Get Started with Commercial Solar

If your business is looking to reduce electricity costs and improve energy efficiency, now is the time to explore commercial solar solutions.

Contact Westsun Energy for a Commercial Solar Assessment in Perth or across Western Australia.

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Western Australia operates one of the most unique electricity networks in the world. The South West Interconnected System (SWIS) runs in isolation, meaning WA cannot rely on interstate electricity imports during peak demand or emergency events.

As extreme heat events become more frequent across Perth and regional Western Australia, maintaining grid stability is becoming increasingly complex. At the same time, the state is transitioning away from coal-fired power stations such as Muja and Collie, increasing the importance of renewable and distributed energy generation.

In this environment, commercial solar in Western Australia is no longer just a sustainability initiative — it is critical infrastructure helping stabilise the grid.

The Rise of Commercial Solar in WA

Across Perth’s industrial estates, logistics hubs, manufacturing facilities, schools and shopping centres, large-scale commercial solar installations are accelerating.

On 40+ degree days in Perth WA, electricity demand spikes due to air conditioning loads. Commercial solar systems generate peak output during the middle of the day, helping to:

• Reduce strain on the SWIS network
• Lower peak demand pressures
• Reduce reliance on ageing coal-fired generation
• Improve local voltage stability
• Decrease wholesale electricity volatility

Every megawatt of commercial solar installed across Western Australia contributes to strengthening the network during extreme weather.

Westsun Energy’s Role in Supporting WA’s Grid

Westsun Energy has built a strong reputation as a leading commercial solar company in Perth WA, delivering engineered large-scale solar installations designed for long-term performance.

As a full-service EPC (Engineering, Procurement & Construction) contractor, Westsun Energy manages:

• Detailed engineering and system design
• Energy modelling aligned to WA network conditions
• Procurement of Tier 1 solar components
• Construction and installation
• Grid approvals and commissioning
• Ongoing maintenance and monitoring

Our experience delivering complex commercial solar projects across Western Australia ensures systems are engineered for durability, safety and maximum energy yield.

Contact Westsun Energy for a Commercial Solar Assessment in Perth or across Western Australia.

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Page Highlights

• Discover the Small-scale Renewable Energy Scheme (SRES) and WA’s Cheaper Home Batteries Program
• Learn how commercial solar rebates can reduce costs for your business
• Explore current solar panel and battery incentives at both federal and state levels
• FAQs covering eligibility, rebate amounts, and how to claim your benefit

Why Now Is the Ideal Time for WA Businesses to Invest in Solar

As energy prices rise and sustainability becomes a business imperative; solar power continues to be a smart investment for small businesses in Western Australia. Fortunately, there are several solar rebates and incentives available to ease the upfront costs of solar panels and battery storage systems.

In this post, we break down the major government initiatives that support solar uptake in WA, including the federal Small-scale Renewable Energy Scheme (SRES) and newly announced Cheaper Home Batteries Program which comes into effect 1 July 2025.

We’ll also answer common questions about solar battery rebates WA businesses are eligible for in 2025.

Small-scale Renewable Energy Scheme (SRES)

What is SRES?

As a trusted name in commercial solar installations across Western Australia, Westsun Energy works closely with business owners, project managers, and facility operators to develop customised solar solutions. Our systems are engineered to suit your unique energy demands and are backed by premium components, detailed monitoring, and professional aftercare.

The Small-scale Renewable Energy Scheme is a federal program that provides financial incentives for eligible solar PV systems, wind turbines, hydro systems, and solar water heaters. For solar installations, the benefit comes in the form of Small-scale Technology Certificates (STCs), which represent the clean energy your system is expected to produce.

Under SRES, small businesses can effectively receive a point-of-sale discount when purchasing an eligible system from an accredited provider. This incentive can reduce the system cost by thousands of dollars, depending on:

• System size (up to 100 kW)
• Installation date
• Location (zones with higher sunlight hours generate more STCs)

How Westsun Makes It Easy

As a CEC-accredited provider, Westsun simplifies the process of claiming your SRES rebate by applying the STC discount at the point of sale. This can shave thousands off the total cost, depending on your system’s size and location.

We take care of all the admin, ensuring you get the maximum rebate you’re entitled to, without the stress.

Consult with Us

The Cheaper Home Batteries Program

What is it and does it extend to business owners?

Launching on 1 July 2025, the Australian Government’s $2.3 billion Cheaper Home Batteries Program extends the SRES to include battery systems up to 100 kWh capacity. As a small business you can claim a 30% upfront discount (circa $372 per kWh for 2025) on the first 50 kWh of usable battery capacity.
Eligibility criteria:

• Install a CEC-approved, VPP-capable battery
• Use a Solar Accreditation Australia (SAA) accredited installer
• Battery size: 5–100 kWh, with rebate applied per usable kWh

WA State Top-up

WA adds its own rebate via the Residential Battery Scheme, offering state funding on top of the federal rebate:

• Synergy zones: $130/kWh (up to $1,300)
• Horizon Power zones: $380/kWh (up to $3,800)
  Combine these with the federal rebate to receive up to $5,000–7,500 per installation in WA

Consult with Us

Looking Beyond Solar Rebates

While SRES and WA’s battery scheme are the major programs, businesses may also be able to benefit from:

• Instant Asset Write-Off for eligible energy-efficient assets such as solar panels, batteries, and inverters. This allows you to claim the full cost as a tax deduction in the same financial year
• State-based energy efficiency grants, which are sometimes offered by WA Government departments or industry-specific bodies to support upgrades in manufacturing, agriculture, and commercial premises
• Opportunities to join Virtual Power Plant (VPP) networks
  This is a coordinated network of solar, battery, and smart energy systems that participate in the electricity market, typically earning revenue during peak demand, frequency control, and grid support events. Businesses joining a VPP can earn ongoing income, often hundreds per year by releasing stored energy back to the grid or providing services to network operators.

Maximise your Solar Rebate by reaching out to Westsun Energy Today

Our team works closely with each client to identify which of these programs they qualify for, handle the necessary applications, and design compliant systems that unlock every layer of available support.

At Westsun, our goal is to make it easy for your business to maximise savings and long-term return from your solar investment. To get started, get in touch with our team on (08) 9303 9810 or get a quote online today.

Consult with Us

 

Frequently Asked Questions (FAQ)

Does WA offer rebates for solar panels or battery systems?

• Solar panels – WA doesn’t offer state-level solar panel rebates but WA businesses benefit from the federal Small-scale Renewable Energy Scheme (SRES). Under this scheme, Clean Energy Council (CEC) accredited installers like Westsun apply Small-scale Technology Certificates (STCs) as upfront savings, reducing system costs by around 20–30%.
• Batteries – For battery storage, WA businesses also have access to the federal Cheaper Home Batteries Program and the WA Residential Battery Scheme, which together can deliver up to $5,000–7,500 in savings for businesses.

Who qualifies for the WA $5,000–$7,500 battery rebate?

Businesses in Synergy postcodes can receive up to $5,000, while those in Horizon Power areas may get up to $7,500 when combining federal and state rebates

Requirements include:

• Installation on or after 1 July 2025
• Approved VPP ready battery system
• Business must be in an eligible postcode
• Battery installations require VPP enrolment

Can businesses claim Federal and WA rebates together for solar and batteries?

Absolutely. Businesses can stack the federal SRES solar rebate, the federal Cheaper Home Batteries rebate, and the state WA battery top-up rebate for combined savings. This integrated incentive model applies to both new solar battery systems and battery additions to existing solar installations. Read More

As energy costs climb and sustainability expectations grow, commercial businesses across Perth and regional WA are turning to solar power as a smart long-term investment. At Westsun Energy, we’re helping forward-thinking businesses unlock the benefits of commercial solar solutions in Western Australia — from cost savings to ESG performance.

Why Commercial Solar is Gaining Momentum in WA

Businesses are increasingly aware of the operational and reputational value of going solar. With electricity prices rising and customers valuing sustainable practices, investing in a commercial solar system in Perth is no longer just an environmental choice — it’s a competitive advantage.

Key benefits include:

• Major reductions in grid reliance
• Protection from energy price volatility
• Faster ROI with government incentives
• Improved carbon footprint and ESG reporting

Westsun Energy – WA’s Commercial Solar Experts

As a trusted name in commercial solar installations across Western Australia, Westsun Energy works closely with business owners, project managers, and facility operators to develop customised solar solutions. Our systems are engineered to suit your unique energy demands and are backed by premium components, detailed monitoring, and professional aftercare. Read More

As electricity prices continue to rise across Western Australia, more businesses are turning to commercial solar power to cut costs, reduce reliance on the grid, and gain greater energy independence. At Westsun Energy, we’re at the forefront of this transition, helping commercial clients across Perth and WA future-proof their operations with efficient, high-performance solar energy systems.

The Cost of Doing Nothing is Growing

Western Australia has seen steady increases in electricity prices over the last decade, with rising wholesale costs, grid maintenance expenses, and national transition efforts toward renewable energy placing pressure on businesses. These price hikes are hitting commercial and industrial users particularly hard — increasing operational costs, cutting into profits, and creating long-term budgeting uncertainty.

Why Commercial Solar in Perth Makes Financial Sense

A professionally designed commercial solar system in Perth can slash energy bills by 30–70%, delivering immediate and long-term cost savings. At Westsun Energy, we work with businesses to design tailored solar solutions that match their energy profiles and usage patterns — whether it’s a retail outlet, warehouse, manufacturing facility, or multi-site business.

How Westsun Energy is Leading the Way

As a trusted provider of commercial solar in Western Australia, Westsun Energy brings decades of industry experience and engineering expertise to every project. We handle everything from feasibility assessments and detailed scope planning to installation, commissioning, and maintenance. Read More

As the effects of climate change continue to impact the planet, businesses need to reduce their carbon footprint and adopt more sustainable practices. One effective way to achieve this is by installing solar panels on their business premises. Not only is solar energy eco-friendly, but it can also provide a range of benefits for businesses; below we have outlined ten of them.

Reduced Electricity Costs

A primary benefit of solar energy for businesses is the potential for reduced energy costs. As they generate their electricity, companies rely less on the grid and can lower their electricity bills. This is particularly advantageous for businesses that consume large amounts of energy.

Increased Energy Independence

Switching to solar energy can also provide businesses with increased energy independence. By generating their electricity, companies are no longer at the mercy of energy suppliers and the grid, which can be prone to power outages and other disruptions.

Commercial Property Value Increase

Solar energy systems can increase the value of commercial properties. Studies have found that installing a solar energy system can increase the value of a property by up to 20 times the annual electricity savings. This can be advantageous for businesses that plan to sell their property.

Government Incentives and Grants

State and federal governments worldwide offer tax incentives and grants to businesses in specific locations that adopt renewable energy sources such as solar power. These incentives can help reduce the initial costs of installing solar panels, making it more feasible for businesses to adopt this technology. Moreover, some governments offer feed-in tariffs, which pay companies for any excess energy they generate and then feed into the grid. Read More

Why Use Commercial Solar?

Commercial solar is targeted towards businesses that use most electricity between 9 am and 5 pm (operating hours).
These commercial-sized systems (10kW) and up carry unique design considerations and challenges we will go through within the blog.

The three distinct size breaks for commercial solar

(Baring in mind, the average residential solar system size is 5kW or around 20 solar panels).

Less than 30kW (around 100 panels)

A 30kW solar system will usually generate around 120kWh of electricity daily on average over a year; this will save approximately $2000 per month if 100% is self-consumed (which is possible in commercial situations).

30kW to 100kW

Solar systems of this size are usually installed in medium-sized offices, small retail businesses and local clubs.

Solar systems of this size require unique designs to protect the grid from all the electricity they generate. They also need special permission from your local electricity network (DNSP) to connect to the grid.

100kW – 250kW

These systems are typically installed in large offices, wineries, hotels and small to medium factories.

If your system exceeds 100kW, you can no longer claim the STC incentive. However, don’t stress you are still eligible for the subsidy known as ‘LGCs’. This is paid every year based on how much energy the system generates. The application process and paperwork can become quite complex as you have to install a special meter and report your generation every year to be eligible for your incentives. We will be more than happy to help you through this process. Read More

Choosing the right commercial solar system has many great perks.

Solar Power has become an attractive investment option for Perth and Western Australian businesses.

How much energy will commercial solar panels in Perth generate?

Generally, a solar PV system in Perth will generate an average of 5.3kWh (kilowatt-hours) of energy per kilowatt of capacity per day on average throughout the year. This is based on 30 years of sunlight data from the Bureau of Meteorology.

Therefore, on average, a 10kW solar system will generate around 53kWh of energy per day, whilst a 100kW solar system will generate around 530kWh per day (with less in winter and more in summer months. Actual energy yields will vary depending on location, orientation/tilt angle and the components used. The below table shows the expected output from typical commercial solar system sizes.

Westsun Energy’s engineers will review your power bills with you whilst providing a detailed summary of the optimal size system and expected savings through the life of your commercial strategy. Read More

WA Timber Sales 40kw Fronius System

Since its inception, WA Timber Sales has become a significant supplier of structural timber and engineered timber products. In recent years, WA Timber Sales has expanded to include fabricating and supplying wall frames and roof tussles.

With their expansion, so has their energy demand.

Westsun Energy installed a 40kW solar system using Q CELL solar panels and Fronius Inverters.

As you can see from the data collected from their live access portal via Fronius. Timber Sales WA solar production covers over 90 per cent of their energy demands. This system is reliable and delivers impressive results. Read More