The best energy rated dishwashers will have a energy rating between A and A+++. A+++ is the best rating available currently available for dishwashers.
Washing machines with an Eco wash programme use up to 60% less energy by running for longer.
Are dishwashers more efficient then cleaning by hand?
Yes they are on average more efficient as they use less water than hand washing. The models with a higher energy rating. This means that will help you save money on both your water and electricity bill. Meaning that they are more environmentally friendly.
Staall Tip: Usually the more expensive the dishwasher the better its energy efficiency and many now include sophisticated energy-saving features such as intelligent tech that perfectly measures out the right amount of water for every cycle.