The EU Energy Label plugin for WooCommerce allows you to easily add class rating images and labels to existing or new product listings.
If you own an e-commerce solution who deals with any one of the 28 EU member states, YOU NEED TO INTEGRATE THE EU ENERGY LABEL on all of your products. By not doing so you risk receiving hefty fines.
Even if you are not within the EU and are not required by law to display the label and class rating why not offer this extra piece of information to your customers? Doing so helps your customers decide on the most energy efficient appliance which in turn could increase sales by better informing your customer base.