Energy storage (most commonly using batteries) is the capture of energy produced at one point in time for use at a later time to provide backup power (resiliency), reduce monthly electric bills, and decreasing greenhouse gas emissions by expanding the use of renewable energy.  By agreeing to allow MCE to control their energy storage systems during non-emergency times, participants in MCE’s Energy Storage Program are also helping to keep costs lower by avoiding using energy from the grid during times when costs are highest.There are many ways of storing electrical energy, however, lithium-ion batteries are the most popular battery storage option today, accounting for more than 90 percent of the global battery storage market. Lithium-ion batteries can be paired with solar panels to allow households and businesses to access electricity when the power is out as an alternative to polluting and expensive diesel generators.