Australia is a world leader when it comes to adopting rooftop solar systems. But our solar transition is leaving renters and apartment dwellers behind.

According to the latest census, almost one-third of Australians rent their homes, live in apartments or are connected to private energy networks. These households are largely unable to benefit from rooftop solar.

Our research shows the reasons for this include limited roof space, relatively high costs for upgrading switchboards and wiring, and long approval wait times. Landlords may also be reluctant to install solar as any energy bill savings go directly to renters.

So renters and apartment dwellers face multiple obstacles in accessing free solar energy. That’s where plug-in solar comes in.

Plug-in solar systems – also known as balcony solar because they can be hung off balcony balustrades – are a convenient, low-cost way for households to take control of their energy use.

But there are several reasons why these systems aren’t being rolled out across Australia.

What are plug-in systems?

Plug-in solar systems are generally made of one or two solar photovoltaic panels, which turn sunlight into electricity. They also have a micro-inverter, which converts solar-generated electricity into the type of electricity that can power household appliances.

These “mini power plants” just need a standard power plug to work. So unlike rooftop systems, they are easily installed and removed without the help of an electrician. Many also........

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