Exploring Off-Grid Solar Systems in Ballarat: The Generator Dilemma
Ballarat is an ideal location for testing the effectiveness of off-grid solar systems in supporting a comfortable lifestyle. The winters here are long and dull, which presents a challenge for solar power generation. To address this, we significantly oversize the solar panel arrays in an attempt to achieve a generator-free, standalone solar system, although this is quite difficult to accomplish. A notable example is a 50kW off-grid system installed just 10 minutes from Ballarat, where the household consumes around 80kWh per day. This results in a solar array to consumption ratio of 80/50. Over the course of a year, the generator has to cover about 10% of the energy consumption. The battery bank of this system is 67kWh, which provides approximately 24 hours of backup power. (system performance info)
To achieve a generator-less system in this context, one would need to significantly increase both the solar array and the battery bank. However, the required increase would be enormously large, making it impractical and not worth the investment for this particular case. It is more cost-effective to maintain a generator for backup power.
On the other hand, for an average Ballarat family with a daily consumption of around 16kWh, achieving a generator-less system could be feasible at a reasonable cost. This would involve a more modest increase in the solar array and battery bank size to ensure sufficient power supply and storage to cover the household’s energy needs without relying on a generator.
