Solar and sustainability reporting: what the numbers actually show

What solar generation data can and can't contribute to business sustainability reporting - including NABERS, Green Star, net zero commitments and emissions disclosure.

Key findings

• Your inverter system provides auditable generation and consumption data from day one. Directly usable in most reporting frameworks without third-party verification.
• Solar self-consumption reduces Scope 2 emissions (purchased electricity). It does not directly reduce Scope 1 (direct fuel) or Scope 3 (supply chain).
• For NABERS, on-site solar reduces measured energy intensity, which can improve your star rating.
• Solar alone is not a net zero strategy - it's a meaningful contribution to one. Overstating what solar delivers creates disclosure risk.
• For systems above 100kW the Clean Energy Regulator provides LGC data. Below that, inverter data is your primary source.

What your inverter data gives you

• Total generation (kWh) - all electricity produced by your panels.
• Self-consumption (kWh) - generation used on-site rather than exported. The figure that reduces Scope 2 emissions.
• Export (kWh) - surplus sent to the grid. Emissions accounting is more complex and framework-dependent.

What solar contributes to each framework

• NABERS Energy: on-site generation reduces measured energy intensity. Methodology varies by building type - confirm with an accredited assessor.
• Green Star: contributes to energy and emissions credits, doesn't determine the rating alone.
• GHG Inventory (Scope 2): self-consumed solar directly reduces Scope 2 by displacing purchased grid electricity.
• Net Zero: documented, auditable reduction. Solar alone is rarely sufficient across all scopes.
• ESG Disclosure: quantified data on generation, self-consumption and emissions avoided. Always state the emissions factor and methodology used.

How to calculate avoided emissions

Multiply your self-consumption (kWh) by the relevant state grid emissions factor. The Australian Government publishes annual figures via the National Greenhouse Accounts Factors. Example: a SA business self-consuming 200,000 kWh/year avoids roughly 50 to 70 tonnes CO2e/year at current SA factors.