For Energy drinks producers
If you are into the production of energy drinks, then the .ENERGY domain will make a perfect name for your website. Also since it is very likely that you drink name has energy in it, the .ENERGY name makes it easy to have the option of using a short and memorable name for your business website.
For renewable and non-renewable energy producing company
If your organization deals in the conversion and conservation of any form of energy. Then the. ENERGY domain ending will be a perfect name for your business website. The domain name will also show your commitment to conservation of energy resources.