This article explores how Energy Storage Systems (ESS) solve the fundamental flaw of solar energy—its lack of synchronicity with demand. Learn about system components, cost optimization, and industry trends. Solar energy is no longer just about panels on. These variations are attributable to changes in the amount of sunlight that shines onto photovoltaic (PV) panels or concentrating solar-thermal power (CSP) systems. The synergy between photovoltaic systems and energy storage not only enhances. Photovoltaic Plant and Battery Energy Storage System Integration at NREL's Flatirons Campus NREL is a national laboratory of the U. The system takes the excess electricity generated by your solar panels, stores it.