Relating to the interconnection of the ERCOT power grid to grids outside the ERCOT power region.

HB 4091 allows Texas utilities, cooperatives, and municipally owned power providers to build and operate facilities connecting the ERCOT grid (Texas' power grid) to external power grids. It authorizes these entities to purchase wholesale power from outside ERCOT and interconnect transmission lines across regional boundaries. The bill establishes new rules requiring a minimum 4.3 gigawatt transfer capability between ERCOT and other regions, with the Public Utility Commission overseeing federal approvals and reliability standards. This policy change directly affects Texas power providers seeking to expand grid connections and energy sourcing beyond current ERCOT boundaries.