Mexico’s power market, node by node and hour by hour.
One market day, hour by hour.
16 July 2026, day-ahead market. Each column is a node and its height is that hour's price. The node average runs from 460 MXN/MWh at 07:00 to 1,122 at 22:00; on Cozumel it reaches 11,767 at 13:00.
Day-ahead PML for 16 July 2026, 2,588 nodes, Mexico City time. Source: CENACE, processed by NodeWatch.
Where a battery earns most.
With 4 hours of storage, the typical node earns 857 MXN per kW a year charging in the cheap hours and discharging in the expensive ones of the day-ahead market. In Mérida it earns 3,339: 3.9 times more. The Yucatán peninsula tops the map.
Daily gap between the most and least expensive hours of the 2025 day-ahead market across 2,573 nodes; gross arbitrage revenue. Source: CENACE, processed by NodeWatch.
Where the sun is worth most.
Mexico's best sun is in the north-west: up to 1,974 kWh per kW a year. But there the price drops exactly in the sunny hours. In Puerto Peñasco, a solar kW earned 242 MXN in 2025; in Playa del Carmen, with less sun, 3,382: 14 times more.
Resource: modelled P50 annual solar yield per 0.25° cell, weather years 2005–2024. Value: modelled gross 2025 solar revenue per node, with same-year ERA5 weather and day-ahead prices; not metered output or net income. 2,559 nodes. Source: CENACE and ERA5, processed by NodeWatch.
An industrial park that makes its own power. BETA
Parque Industrial Querétaro, a summer weekday on the GDMTH tariff. From 00:00 to 06:00 energy costs 1.02 MXN/kWh; from 20:00 to 22:00, 2.06. The solar roof covers midday and the battery charges in base hours to discharge at peak. NodeWatch's Site Optimizer sizes the roof and the battery from your real consumption.
SIN GDMTH hours, summer weekday (Acuerdo CT/11.SE/8-2025) and Bajío energy charges for July 2026: generation plus transmission, CENACE and SCnMEM. Source: CFE via CNE, processed by NodeWatch. Load, solar profile and battery are illustrative.
A virtual PPA: Campeche sun for four plants.
A 40 MW solar plant in Escárcega sells its energy to four plants on the SIN, paid as produced; the rest is bought at the PML and the regulated part is paid the same either way. On a July day, 30% is renewable and the cost falls from 1,757 MXN/MWh on CFE's GDMTH to 941: 46% less.
Assumptions: a 40 MW plant with its cell's P50 yield (1,532 kWh/kW-yr) and a typical solar profile; a PPA price of 850 MXN/MWh; illustrative loads of 7, 9, 6, 5 MW. Real: each site's day-ahead PML for 16 July 2026 and its region's July 2026 GDMTH tariff (CFE via CNE). Both sides pay transmission, distribution, CENACE and SCnMEM; capacity, CELs and supplier margin are excluded. NodeWatch's PPA evaluator computes your full case.