Energy storage technology is designed to be durable and reliable enough to hold on to electrical energy until it needs to be used. With the shift toward renewable energy sources like solar power, batteries and other energy storage systems can help to ensure there’s power available to meet demand. These solutions can come with a variety of other benefits, such as saving utility providers — and by extension their customers — money, as well as providing backup power in the event of an emergency. We’ve rounded up some top energy storage companies coming up with short- and long-term methods of capturing energy for later use.