The Comptroller General of Chile has approved Supreme Decree 70/2023, which modifies the regulations governing power transfers between generating companies established in the General Law of Electrical Services and will replace the current Supreme Decree No. 62/2006. This represents a further step in promoting energy storage systems and renewable energy in the country, as the Chilean energy sector has been awaiting its update for some time. The regulations define the methodologies, procedures, and criteria applicable to determining power transfers resulting from coordinated operations. The legislation was even made available for public comment at the beginning of last year ( see note ) and in November 2023 was submitted to the Comptroller General's Office after receiving more than 400 observations and comments from the sector . After several withdrawals due to administrative procedures, the Comptroller General's Office approved it, and now only its publication in the Official Gazette remains for it to enter into force. Among the main changes under the transitional regime, the extension of the deadline for the regulation's entry into force to 10 years (5 more than initially planned by the government) stands out, as does the application of the initial power recognition table to energy storage systems (ESS) and the storage component of renewable energy plants with storage capacity (REPCs). The methodology for calculating the initial power of ESS will correspond to its contribution to the load curve, based on the results of daily optimization that reduces the differences between maximum and minimum system demands. In the case of REPCs, remuneration will be calculated by adding the remuneration of the renewable energy plant to the storage component, each with its own methodology for determining its contribution. In other words, one of the main modifications of the regulation focuses on the percentage of initial power recognition for an ESS or the storage component of a hybrid renewable energy park (generation + batteries). As Energía Estratégica anticipated, for those projects with storage capacity of less than one hour, no percentage is recognized, but from those that can accumulate energy for more than one hour, the percentage varies from 36% to 100% (only in those with a capacity greater than or equal to 5 hours). 
In cases involving storage components or pure systems with capacities measured in fractions of hours, the percentage recognition will be determined from the table above, using a linear approximation between the corresponding hours, as explained by the sector.
