Cheapest time to go off-grid – How much it will cost to wave Eskom goodbye

Transitioning to an off-grid solar system is becoming increasingly affordable for South African households. Depending on electricity consumption and the desired setup, the cost to go fully off-grid ranges between R167,000 and R529,000.

Currently, solar panels, inverters, and batteries are at their lowest prices ever due to an oversupply and reduced demand following a surge in imports in early 2023. This makes it one of the most cost-effective times to invest in a solar and backup battery system.

For those committed to completely eliminating their dependence on Eskom, an off-grid setup is a viable option. However, it requires a significant investment, as these systems must be over-engineered with additional solar panels and batteries to ensure reliable power during periods of low solar availability.

Hybrid Solar Systems for Various Consumption Levels

According to Eskom, the average South African household consumes 900 kWh (30kWh per day) of electricity per month and would need to spend approximately R245,000 for a fully hybrid solar system with sufficient backup capacity for two days without solar power. This system is designed with double the output and storage capacity to guarantee uninterrupted power.

Alternative: Grid-Tied Systems

Opting for a grid-tied solar system with Eskom as a backup is a more economical choice. This setup reduces costs by a third or more compared to fully hybrid solar systems since it doesn’t require over-engineering for non-sunshine periods. A grid-tied system supporting a load of 30kWh per day will cost approximately R45,000. Additionally, grid-tied systems allow for feeding excess electricity back into the grid, potentially reducing overall energy costs.

However, Eskom’s new tariff structures may include higher capacity charges, which could impact those using the grid primarily as a backup. The effective price per kWh will decrease with higher usage, making it crucial to weigh the benefits and costs carefully.

Supplementary Generator Systems

For added reliability, some households may consider supplementing their off-grid system with a generator.

Transitioning to off-grid solar power offers numerous benefits, from reducing reliance on Eskom to promoting environmental sustainability. At Powernsun, we provide high-quality solar components to support your journey towards energy independence.