The Solar Divide

Rooftop solar’s divide isn’t about what you earn - it’s about whether you own the roof or not.

Social and Economic Issues - Open data - Australia

Australia has put rooftop solar on more than one in three homes The easy story is that solar is a wealthy suburb’s luxury. The data tells a sharper one. Scroll to see where the panels really went, and who got left in the shade.

We expected money to draw the line: richer postcodes, more panels. So we plotted every one of 2,201 postcodes - renter share across the bottom, solar systems per 100 dwellings up the side and coloured each by its SEIFA disadvantage decile.

If income and advantage were the story, the colours would stack up the screen: disadvantaged low, advantaged high. They don’t - the shades are scattered top to bottom. Statistically, a suburb’s wealth or disadvantage barely moves the needle on whether it gets solar.

What does line up is the shape of the cloud. As you move right - more renters, the points slide down. The red trend line falls away.

This is the real signal: as the share of renters goes up, solar uptake drops dramatically - a far stronger divide than wealth. Hover any point to find a postcode you know.

The reason is straightforward. You can’t bolt panels to a roof you don’t own. Income is deceptive; the divide runs along tenure.

Source: Clean Energy Regulator (2026); ABS Census & SEIFA 2021 Note: A SEIFA decile ranks an area’s socio-economic status relative to other areas in Australia

So we ran the clock. Each postcode is one dot; press play and the years roll from 2011 to 2026, dots climbing as installs accumulate.

Early on, everyone sits low together - solar is a novelty and the bands are bunched.

Then the boom hits. The blue owner-dominated postcodes shoot up the screen, decisively.

The red renter-heavy postcodes climb too but slowly, dragging along the floor. The vertical distance between blue and red stretches open every year.

By 2026 the median owner-dominated postcode sits near 65 systems per 100 dwellings; the renter-heavy median is stuck near 29. The boom didn’t close the gap. It widened it.

Source: Clean Energy Regulator (2026); ABS Census 2021

Maybe it’s just geography - cold cities versus the sunny north? We split owner-dominated from renter-heavy postcodes within each state.

The blue dot (owners) sits to the right of the red dot (renters) in every single state - the gap never closes.

It survives even where solar is easiest: in sunny Queensland and South Australia, owner postcodes still run 30-plus systems per 100 dwellings ahead of renter ones.

A third of Australian households rent. As power bills climb and the grid leans on rooftop solar, they are being locked out of the cheapest energy in the country - not by income, but by the lease on their door. That is the divide worth fixing.

Source: Clean Energy Regulator (2026); ABS Census 2021 Note: on hover, n represents number of owner/renter dominated postcodes

Conclusion

Rooftop solar’s spread looks like an outstanding success until you ask whose roofs. The fault line isn’t what you earn - it’s whether you own and it has widened through the very boom that was meant to spread cheap power. Peer-reviewed research reaches the same conclusion: ownership and wealth - not income, drive who gets solar and the renter gap has been widening (Best et al., 2023). Policy that ignores tenure (split-incentive fixes, solar-for-renters schemes, mandated landlord standards) will keep building a two way split.

Acknowledgement of generative AI

I did not use GenAI for this work.

References

• Australian Bureau of Statistics. (2022). 2021 Census of Population and Housing: General Community Profile (Tables G02, G37), Postal Areas (Data set). Australian Bureau of Statistics. https://www.abs.gov.au/census/find-census-data/datapacks
• Australian Bureau of Statistics. (2023). Socio-Economic Indexes for Areas (SEIFA), Australia, 2021: Postal Area, SA1 distributions (Data set). Australian Bureau of Statistics. https://www.abs.gov.au/statistics/people/people-and-communities/socio-economic-indexes-areas-seifa-australia/latest-release
• Clean Energy Regulator. (2026). Small-scale installation postcode data (Data set). Australian Government. https://cer.gov.au/markets/reports-and-data/small-scale-installation-postcode-data
• Best, R., Chareunsy, A., & Taylor, M. (2023). Emerging inequality in solar panel access among Australian renters. Technological Forecasting and Social Change, 194, Article 122749. https://doi.org/10.1016/j.techfore.2023.122749
• Best, R., Chareunsy, A., & Taylor, M. (2023). Changes in inequality for solar panel uptake by Australian homeowners. Ecological Economics, 209, Article 107851. https://doi.org/10.1016/j.ecolecon.2023.107851
• Hammerle, M., White, L. V., & Sturmberg, B. (2023). Solar for renters: Designing policies to promote investment. Australian National University. https://policybrief.anu.edu.au/solar-for-renters-designing-policies-to-promote-investment/