Mexico's High Power Prices Signal Major Battery Storage Opportunity in 2026

High wholesale power prices in Mexico last year point to significant opportunities for battery storage providers and generators in 2026, according to energy analytics firm Admonitor. Prices peaked between April and August 2025, reaching an average of 1,112 pesos per megawatt-hour (US$63/MWh) in May, Admonitor said on Monday in an analysis of data from transmission system operator Cenace. Spreads between daytime and evening peak-time prices were also highest in that period. Battery storage providers generate much of their revenue by storing cheap electricity during the day and injecting it into the grid at night when prices are higher. In 2025, power prices in Mexico's main electricity market topped US$90/MWh at around 9 p.m. in the summer months, while midday prices dropped to around US$30/MWh. Admonitor described the April–August period as a “key window for charging during trough hours and discharging at peak times.” For their part, power producers will be able to maximize the value of their output during those months, if the trend seen in 2025 is repeated in 2026. Conversely, Admonitor recommended that large electricity users schedule maintenance during that period, when power prices are highest. Wholesale power prices were lowest in September and October. (The original version of this content was written in English)