The more stars on the Energy Rating Label, the more energy efficient the appliance is. Efficient appliances use less electricity to achieve the same level of performance of similar models with the same size or capacity. The more energy efficient a model, the less energy it will use and the less it will cost you to run.
Generally, appliances with higher star ratings cost more. However, they also use less energy, so you may save money on your energy bills over time. Therefore, the minimum you should choose depends on the initial cost of the appliance, how much energy it saves, and how long you’ll use it for.
Generally, low-star appliances cost less upfront, but cost more over time. If you only plan on using the appliance for a couple of years, the upfront saving may outweigh the long-term energy saving. As a general rule, the longer you need the appliance, the more stars it should have.