US Federal Energy Regulatory Commission (FERC) has called for organizations to step up their facilitation of storage in US wholesale markets, as current practice threatens to stunt technological innovation. Both regional transmission organization PJM Interconnection and independent system operator Southwest Power Pool (SPP) are being told them must change their practice to come in line with FERC Order 841, despite failing to fully comply with rulings designed to promote electricity storage for regional grids. FERC has demanded that both organizations closely review their requirements for storage to be accepted into respective energy markets and allow innovation in storage to be supported. Order 841, issued by FERC in February 2018, directs grid operators to remove barriers to the participation of electricity…