In most nations, houses use approximately 40% of all energy consumed, primarily for heating, ventilation, air conditioning, and powering electrical appliances. The excess demand for electricity affects the electrical grid, and an interruption known as load shedding may be necessary to distribute available electricity to all clients. Load-shedding has numerous adverse effects on individuals, businesses, and the entire nation of South Africa. A significant contribution is needed to minimise residential energy consumption and then fulfil the lower load with on-site renewable energy systems to reduce the negative impacts of load shedding. The suggested method entails retrofitting multiple non-energy-efficient household appliances and utilising renewable energy technology to lessen household energy consumption. The findings demonstrated that the total daily energy consumption using energy-efficient appliances in the summer was 16.8605 kWh, compared to 30.569 kWh for non-efficient appliances. This represented an average monthly billing of R1269.899 in April 2025, compared to R2302.395 spent in March and April 2024, before the enhancement of energy efficiency in households. The findings of this study will help households identify critical electrical appliances, reduce their energy bills, and benefit South African electrical grid providers by mitigating the effects of load shedding. Additionally, this study will serve as a basis for further research by providing information on the reliability and cost-effectiveness of renewable energy and energy efficiency appliances.