4.5 Front-of-meter vs behind-the-meter; the two worlds BESS lives in

Two different regulatory universes

The meter in question is the utility revenue meter — the point that separates the utility grid from the customer facility. Front-of-meter means the BESS connects on the utility side of that meter, directly to the transmission or distribution grid. Behind-the-meter means it connects on the customer side, serving a specific facility or campus.

Utility-scale BESS is front-of-meter. It is grid infrastructure. It interconnects under a utility interconnection agreement, participates in ISO or RTO markets, is subject to FERC jurisdiction, and must comply with grid codes and reliability standards that behind-the-meter systems do not face. The construction requirements, the safety standards, and the commissioning process reflect that.

Behind-the-meter systems — commercial and industrial storage, large campus installations — operate under a different regulatory framework, typically governed by state utility commissions and local building codes rather than FERC and ISO rules. The construction and safety standards overlap significantly with NFPA 855 and NEC Article 706, but the interconnection and operational requirements differ. This course is calibrated to front-of-meter, utility-scale projects. When you see references to interconnection requirements, ISO market rules, or utility hold points in the commissioning sequence, that is the context.