It’s getting easier to live off-grid – but it comes with certain costs

Brisbane, throughout Australian history, going off-grid referred to residing in areas without access to the primary electricity network. These isolated communities and remote farming properties typically relied on stand-alone power systems comprising solar panels, batteries, and diesel generators, with no physical connection to the national grid.

Off-grid power was often the most practical option in these locations, as maintaining kilometers of power lines for a small number of customers could prove more expensive than supplying each property individually.

Increasingly, individuals are contemplating off-grid living in rural and remote regions. Such households generally consist of owner-occupiers with additional funds, suitable roofs or land, and an interest in reducing emissions or attaining self-sufficiency. However, few people opt to completely disconnect from the grid, primarily due to high upfront costs. Renters and low-income households attempting to do so face numerous obstacles.

The rise of renewable energy systems has made off-grid living more accessible. Australia has installed over 4.2 million rooftop solar systems, and in just one year, more than 460,000 battery installations occurred. Several factors have contributed to this trend. First, renewable energy technology has become more affordable. The federal Cheaper Home Batteries Program, which offers a discount of approximately 30 percent on eligible battery systems, is one example.

Second, renewable technology is advancing rapidly. Modern inverters can maintain specific appliances during power outages, and home energy-management systems, such as smart meters, enable households to coordinate solar generation, batteries, hot-water systems, and electric-vehicle charging with a single button press. Rules have also evolved, allowing power companies to replace costly grid connections with regulated stand-alone systems since 2022.

These more economical alternatives permit customers to disconnect from the physical grid without sacrificing consumer protections.

However, not every solar-and-battery home can function without grid power. Most grid-connected solar systems automatically shut down during outages for safety reasons. Generating backup power is not always straightforward. Before purchasing a household battery, individuals must consider various factors, including their electricity usage, the size and design of their existing solar system, and the need for microgrids during natural disasters.

While going off-grid has several advantages, such as independence from fluctuating energy prices and network tariffs, greater control over electricity sources, and heightened resilience during blackouts, it also entails downsides like unreliable or insufficient power, higher expenses for backup energy infrastructure, equipment maintenance and eventual replacement, relinquishing the ability to sell surplus solar energy back to the grid, and the necessity to manage off-grid systems independently or hire someone else to do so.

The economics of going off-grid depend on location. Disconnecting from the grid is most cost-effective in areas where building a new connection or maintaining a remote line would be prohibitively expensive. It is far less justifiable in suburban areas with reliable, shared infrastructure. Our recent review of 146 studies examining the transition from passive consumers to active energy users generating, storing, and managing electricity revealed that despite adopting solar systems, electric vehicles, and other renewable technologies, most people remain connected to the grid due to its reliability and backup options.

Consequently, the future will likely involve near off-grid energy systems, where households are largely self-sufficient annually but remain connected for those rare moments when they cannot rely on local generation and storage. This hybrid model appears to be the more realistic option for most Australians. However, this shift raises a challenging policy question: households occasionally using the grid may still expect it to deliver instant and reliable power, prompting a need to adjust network tariffs to prevent financially disadvantaged individuals from being penalized.

Simultaneously, those who invest in renewable energy technology should be rewarded through government incentives and rebates. Australians are no longer questioning whether they can leave the grid but rather whether they are better off bearing the costs of off-grid living or relying on a shared network. The near off-grid future may offer a middle ground.