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Australia’s solar and battery energy landscape is evolving, with Evoenergy updating its inverter installation rules to align with the revised national standard AS/NZS 4777.1:2024. These changes are designed to improve safety, streamline installations, and future-proof grid integration. From 23 February 2025, these rules will become mandatory for all new and modified solar and battery systems within Evoenergy’s distribution network.
Whether you’re an installer, property developer, or a homeowner planning a solar upgrade, understanding these new requirements is critical for ensuring compliance and avoiding installation delays or costly modifications.
The AS/NZS 4777.1 standard outlines installation requirements for grid-connected inverters in Australia and New Zealand. The 2024 revision introduces updated technical criteria and more flexible configurations to meet the evolving needs of residential and commercial renewable energy systems.
This update was coordinated by the Clean Energy Council, Energy Networks Australia (ENA), and local electricity distributors like Evoenergy, ensuring a national approach to safety, reliability, and efficient energy distribution across the grid.
Under the previous framework, commercial systems over 30kVA required dedicated interface protection (central protection equipment) to isolate the system in case of grid anomalies. Evoenergy’s updated policy now removes this requirement for systems up to 200kVA.
This simplification reduces both the hardware costs and installation complexity for most commercial-scale solar and battery systems.
Installers and business clients will see reduced project costs and timelines, particularly for systems sized between 30kVA and 200kVA. This could encourage more widespread adoption of mid-size commercial solar solutions.
Residential customers will benefit from increased allowable inverter sizes. The single-phase limit has been raised from 15kVA to 20kVA, inclusive of battery storage (ESS). For three-phase sites, the limit is now 20kVA per phase with no total cap, replacing the previous 30kVA total system cap.
These updated limits simplify integration of larger batteries, enabling greater energy independence and encouraging the adoption of renewable energy technologies in residential settings.
To ensure balance and reduce strain on network infrastructure, single-phase inverters installed at three-phase sites are now subject to sub-limits:
Installers must ensure hybrid inverters or battery systems like Tesla Powerwall 3 comply with these new per-phase limits. Non-compliant configurations may require re-engineering or inverter substitution.
Starting 21 February 2025, Evoenergy will implement new default solar export limits:
Customers seeking to export more than 10kVA total can apply for a network impact assessment. These assessments may include fees and additional technical review.
Existing installations only need to comply with the new rules when changes or upgrades are made. However, any new components added must meet updated standards.
Warranty replacements may be exempt if the same product is used and settings are preserved. Generation limits may need adjustment for compliance.
The changes support broader uptake of solar and battery systems by removing outdated limits and clarifying installation pathways.
Reduced interface protection requirements lower the cost and complexity of deploying systems between 30kVA and 200kVA.
The upcoming inverter installation rules represent a major shift in the regulatory landscape for distributed energy systems in Australia. With a focus on safety, flexibility, and grid stability, the new guidelines encourage responsible growth of solar and battery technology.
Installers and energy professionals should take proactive steps to understand these changes, update their practices, and help clients make informed decisions.
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