Yes, commercial solar can improve your NABERS Rating, but only in a specific way. The solar power your building actually uses reduces the grid energy it draws, which is what lifts the score. The catch is that the solar you export to the grid does not count the same way.
That single distinction trips up many building owners. They install panels expecting an automatic jump in stars, then feel let down. Once you understand how the rating actually works, the picture makes far more sense.
What Is a NABERS Rating, Anyway?
NABERS stands for the National Australian Built Environment Rating System. It rates a building’s real energy performance on a scale of 1 to 6 stars.
The rating is not based on your design or your intentions. It measures actual, metered energy use over a full twelve months. A NABERS assessor takes your utility data and turns it into a star score.
For NABERS rating commercial buildings, this matters enormously. Offices, shopping centres, and hotels all use it to prove their efficiency. A higher score signals a well-run, lower-cost, more sustainable building.
How Does Solar Actually Affect the Score?
Here is the part that surprises people. NABERS mostly measures how much energy your building pulls from the grid.
When your solar panels power the building directly, you draw less from the grid. That lower grid figure is what the rating sees, and your score improves as a result. The energy you generate and use on-site quietly does the work.
The relationship between commercial solar NABERS performance comes down to self-consumption. Using solar yourself helps your rating. Solar you export to the grid, however, does not lift the star score in the same way.
Why Doesn’t Exported Solar Count?
This feels unfair at first, but there is logic to it. NABERS rates the energy performance of your building’s operations.
The power you send to the grid is no longer powering your building. It benefits the wider network instead, so it sits outside your operational footprint. The rating focuses on what happens inside your four walls.
There is a further wrinkle worth knowing. If you create and sell large-scale generation certificates for your solar energy, that energy may no longer count as renewable energy for your building. The rules reward the power you genuinely keep and use.
How Much Difference Can Solar Really Make?
The impact is real, though it varies by building. A well-sized system that the building uses heavily can shift the score meaningfully.
Take a real example. Vicinity Centres rolled out solar across its shopping centres and saw ratings climb, with one portfolio moving from 4.4 to 4.6 stars. That gain came alongside efficiency upgrades, which is the key lesson.
Solar works best as part of a broader plan to building energy efficiency Australia. Panels reduce your grid draw, while efficiency measures reduce your total demand. Together, they push the score higher than either could on their own.
What Makes Solar Work Harder for Your Rating?
Not every solar setup helps equally. A few factors decide how much your rating benefits.
- Self-consumption: The more solar you use on site, the better. Match generation to when the building actually runs.
- System size: Oversizing leads to exports that do not count. Right-sizing keeps more power in the building.
- Usage patterns: Buildings that are busy during daylight hours gain the most from solar.
- Battery storage: Storing excess solar energy for later use further increases self-consumption.
A daytime-heavy building, like an office or a shopping centre, is ideal. It consumes power exactly when the sun is generating it. That natural overlap is where solar earns its keep.
Is Solar Worth It Beyond the Rating?
The rating is only part of the story. Solar delivers benefits that go well past the star score.
The most obvious is cost. Every kilowatt-hour from your roof is one you do not buy from the grid. For commercial solar systems, the savings often pay back the investment within a few years.
There is also a growing investor angle. Sustainability now sits at the centre of ESG commercial real estate decisions. A strong NABERS score, backed by solar, makes a building more attractive to tenants and buyers alike.
How Does This Fit the Net Zero Goal?
Solar is a natural step toward broader climate targets. Many owners now aim for net zero commercial buildings, and on-site generation is a core component of that.
The grid itself is also getting cleaner every year. As coal retires and renewables grow, grid electricity carries fewer emissions. This steadily rewards buildings that are highly electrified and efficient.
A building that combines solar, efficiency, and full electrification is well-positioned. It scores better on NABERS energy today and stays ahead as the rules tighten. The direction of travel clearly favours this approach.
So, What Should You Do Next?
Start by understanding your building’s energy profile. Look at when you use power and how much comes from the grid. That tells you how much solar can realistically help.
A few practical steps make the path clearer:
- Get a NABERS assessment to see your current baseline
- Size any solar system around your daytime consumption
- Pair solar with efficiency upgrades for the biggest gain
- Consider storage if your usage peaks outside daylight hours
The honest answer is that solar helps, but rarely on its own. It works best as one part of a smart energy strategy. Improving your NABERS energy score is about the whole system, not a single fix.
If you want to know how solar could shift your specific rating, expert advice pays off. Speak with the accredited team at Eco Certificates to map out the right approach for your building.
FAQs
How can I improve my NABERS rating?
Focus on cutting grid energy use. On-site solar, efficiency upgrades like LED lighting and better HVAC, and full electrification all help. A NABERS assessment first gives you a clear baseline to work from.
What are the benefits of a NABERS rating?
A strong rating lowers running costs, proves your building’s efficiency, and attracts tenants and investors. It also supports the shift toward net zero commercial buildings, which matters more to the market each year.
What is the maximum NABERS rating?
The scale runs from 1 to 6 stars. A score of 3 stars reflects average performance at launch, while 6 stars represents the very best, market-leading buildings. This structure keeps the system adaptable across different property types and markets.
Do I need a NABERS rating?
It is mandatory for many commercial buildings, including those over 1,000 square metres and any building being sold or leased under disclosure rules. Even where it is optional, many owners choose to rate voluntarily for the commercial edge.
