Installed capacity of the power system
3,559.2 MW
2024MEM/INEThe official installed capacity of the national grid by technology (2025) is in MEM's Indicative Generation System Expansion Plan 2026-2050 (PEIG), but mem.gob.gt blocked the automated download and the figure was not confirmed in a primary source; the press (Republica GT) mentions an 'effective capacity close to 3,400 MW'. The 2025 wholesale market unit costs, main and secondary tolls, RRO and capacity deviations in US$/kW-month, appear on p. 7 of the AMM 2025 Statistical Report.
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- Wholesale-market unit charges (AMM, Q4 2025)
Fast reserve 6.45; positive DP 4.14; negative DP 8.90; main toll 4.69; secondary transmission toll 0.63; sub-transmission centre 3.30, west 2.22, east 2.06 — all in USD/kW-month
Q4 2025 (AMM quarterly statistical report)AMM
