Some companies even offer specialized renewable energy endorsements that provide enhanced protection for your entire solar and battery storage system. When protecting your battery storage system, specialized insurance options go beyond standard home insurance coverage. NFPA is keeping pace with the surge in energy storage and solar technology by undertaking initiatives including training, standards development, and research so that various stakeholders can safely embrace renewable energy sources and respond if potential new hazards arise. NFPA Standards that. Inverter controls can be grouped into three categories: grid-following (GFL), grid-forming (GFM), and grid-supporting. GFL inverters are referred to as current control because the current is the physical quantity that is regulated. The first example of a relay dates back to the mid-nineteenth century, when Joseph Henry used a small electric signal to activate an. Like all electrical installations, energy storage systems need application-specific protection. Energy Storage Systems (ESS) are now a mature technology.