ISO-NE's NECEC import line compressed day-ahead spreads, but real-time pricing diverged. Maine's real-time premium versus the pool jumped from $19/MW-day to $43/MW-day on online spring days. The gap tracks NECEC's dispatch cycles, not volume.
ERCOT battery revenues fell 23% below the 12-month average in March 2026 at $1.88/kW-month. Real-Time Energy, the largest contributor, dropped $0.27/kW year-over-year. May saw spreads collapse further: TB1 Real-Time fell 60% to $40/MWh as calm weather and fleet growth eliminated scarcity entirely.
Germany's Flexible Connection Agreements look benign at first. A renewables-pegged cap cuts battery revenue by 1.7%. But add an overnight charging restriction and you lose a full point of IRR. That single overnight cap costs as much as a 6%/min ramp limit plus a 30% ancillary restriction combined.
NYISO capacity prices in NYC doubled year-over-year to $32.59/kW-month, driving the reference price to $244/MW-day. Capacity accounts for 94% of that increase. The new Champlain Hudson line arrived mid-May but missed the notice deadline, so it doesn't count toward capacity until July.
