Saving Energy

What is the best way to save electricity? I am helping my sister who works in a food manufacturing company and he's been tasked to find ways to save energy because of their increasing consumption. They have many equipment to include freezers for frozen products, conveyors, etc. Is there a system that can help them in evaluating their monthly energy consumption? Possibly pointing out the reason of their increasing electricity bills.

Location: 
United States

A friend recommended the exact same thing! We're actually going to a consultant next week to get a recommendation. I already did a Google search too and this solution looks just what I'm looking for.