YITH WooCommerce EU Energy Label (Premium Plugin):

Each owner of e-commerce must be aware of all laws that apply. In the case of the most recent European laws, this is about especially if you sell electrical appliances or products under energy classification. Combine business with pleasure YITH WooCommerce EU Energy Label helps you cataloging your products with the necessary labels.

Moreover, the premium version of the plugin offers the freedom to filter immediately the products of the same energy category. This is in order to allow instant navigation for your users. Therefore, if you need to conform to European law, do it using a plugin. It is very easy to use and fast to set up.