More than three in four Australian solar businesses grew on the back of the federal battery rebate over the past year, but new industry research shows that boom has been far kinder to big installers than small ones, and a shortage of qualified subcontractors is a big part of the reason why.
A survey of 345 solar and battery installation companies, released this week by software firm Pylon, found 86% of installers earning over $1 million in annual revenue reported a rebate-driven boost to business. For small and medium-sized firms, that figure dropped to 69%. For businesses that pivoted into solar from trades like electrical and plumbing, it was just 67%.
The gap isn’t simply about marketing budgets or brand recognition. According to Pylon chief executive Nelson Zheng, many smaller installers “were limited to how many projects they were able to install” because they lacked access to subcontractors. This means the solar installer shortage in Australia is now shaping who wins and who loses from a $2.3 billion government incentive.
Quick summary
- Large solar installers (86% growth) significantly outperformed small firms (69%) and trade-crossover businesses (67%) during the 2025–26 battery rebate boom, largely due to labour capacity, not just demand.
- Australia faces a structural shortage of accredited electricians and solar installers, with Jobs and Skills Australia estimating 85,000 additional clean energy workers are needed by 2030, with more than half in already-declared national shortage occupations.
- Smaller installers can offset the bottleneck through in-house apprenticeships, regional subcontractor partnerships, and locking in accredited installers ahead of peak demand periods, rather than competing job-by-job for scarce subcontractor capacity.
Why installer capacity, not demand, is the real constraint
Australia’s rooftop solar and battery sector has grown faster than its trade workforce. Analysis referenced by the Energy Council found at least 51% of the roughly 85,000 additional workers needed for renewable energy construction and maintenance by 2030 sit in occupations already classified as national shortages, chiefly electricians, engineers and accredited installers.
That shortage predates the current battery rebate. But the Cheaper Home Batteries Program, which cuts the cost of eligible battery installations by around 30%, appears to have concentrated demand into a workforce that was already stretched. Changes to the rebate in May 2026, which reduced the discount for larger batteries, triggered what Zheng described as a “solar coaster”: a rush of installations pulled forward into February, March and April, followed by a slower period as the market adjusted.
Expert tip: If you’re a small or growing installer, don’t wait for the next rebate change to lock in labour. Booking accredited subcontractors on retainer, even at a premium, ahead of predictable demand spikes (End of Financial Year, rebate deadline announcements) is cheaper than losing jobs to capacity constraints later.
Who’s accredited, and why it matters for scaling up
Every installation that qualifies for a rebate under the Small-scale Renewable Energy Scheme must be carried out by an accredited installer. Accreditation, previously administered by the Clean Energy Council, is now managed by Solar Accreditation Australia (SAA) under the Clean Energy Regulator, and covers separate classes for grid-connected solar (GCPV), battery systems (GCBS) and stand-alone power systems.
This accreditation requirement is a genuine bottleneck for firms trying to scale quickly: training and accrediting a new installer takes months, not weeks, and demand for accredited tradespeople is shared across solar, battery, EV charging and broader electrification work, all competing sectors chasing the same shallow pool of licensed electricians.
Expert tip: Cross-train your existing electrical staff toward battery (GCBS) accreditation specifically. Many firms hold GCPV accreditation for solar but haven’t extended into battery-specific accreditation, which is where recent rebate-driven demand has concentrated.
What this means for the industry post-rebate
Pylon’s research also found 69% of surveyed businesses named a sudden end to the battery rebate as their single biggest threat, ranking above equipment price hikes or supply shortages. But if installer capacity, not consumer appetite, has been the real limiting factor throughout the boom, the “bust” many installers fear may look different to past rebate cliffs.
Businesses that invested in workforce capacity during the boom, rather than relying purely on rebate-driven walk-in demand, are likely to be better positioned when support eventually tapers. NSW businesses reported stronger outcomes than Victorian ones in the Pylon survey, a gap researchers linked partly to NSW’s simpler approvals process for accredited installers, reinforcing that regulatory and workforce friction, not just subsidy levels, shape who thrives.
FAQs
Why are small solar installers growing slower than large ones in Australia Small installers often can’t access enough subcontractors to keep up with rebate-driven demand. Large firms with established subcontractor networks or in-house teams can scale installations faster, capturing more of the available work during rebate-driven demand spikes.
How big is Australia’s solar and battery installer shortage? Jobs and Skills Australia estimates the renewable sector needs 85,000 additional workers by 2030, with over half in occupations already facing national shortages, including electricians and accredited solar and battery installers.
Who accredits solar and battery installers in Australia now? Solar Accreditation Australia (SAA) took over installer and designer accreditation from the Clean Energy Council in 2024, operating under the Clean Energy Regulator to determine eligibility for Small-scale Technology Certificates.
Will the solar installer shortage ease when the battery rebate ends? Not necessarily. The shortage is structural, driven by long trade-training pipelines and competition from mining, construction and other electrification work, factors that exist independently of any single rebate program.
How can small solar businesses cope with the subcontractor shortage? Options include cross-training existing electricians into battery-specific (GCBS) accreditation, forming standing partnerships with regional subcontractors, and booking installer capacity ahead of predictable demand spikes rather than competing for it last-minute.
Key takeaways
- The battery rebate boom has widened the gap between large and small solar installers, largely due to subcontractor and labour capacity rather than demand alone.
- Australia’s renewable energy sector faces a structural shortage of accredited electricians and installers that predates, and will likely outlast, the current battery rebate.
- Accreditation for battery systems (GCBS) is now managed by Solar Accreditation Australia under the Clean Energy Regulator, and is a separate credential from standard solar (GCPV) accreditation.
- Businesses that build workforce capacity now, rather than relying on rebate-driven demand alone, are better placed to withstand the eventual end of government support.
- Regulatory friction, like approvals processes, compounds labour shortages, with NSW installers reporting stronger outcomes than Victorian ones in recent industry research.
The post Solar Installer Shortage is Leaving Small Firms Behind appeared first on Energy Matters.
