NJ Battery Index
Every month: what a 1 MW / 2 MWh and a 1 MW / 4 MWh battery would have earned in each New Jersey zone from day-ahead energy arbitrage plus the capacity line, with the best and worst days. PJM frequency regulation is shown on its own line as a PJM-wide estimate (the share of hours a battery would clear, which falls as more batteries join), never in the total. Built from real PJM prices on the 1st of each month; past months stay up.
October 2026 (so far)
In October 2026 so far (12 of 31 days), a 1 MW / 2 MWh battery earned the most from day-ahead energy arbitrage in RECO, $908 (80% of the $1,136 perfect-foresight schedule; $1,400 for a 4-hour battery), and the least in AECO, $778. Capacity revenue at the 2028/29 clearing price added $1,150 in every zone, 56% of the $2,059 total in RECO (energy arbitrage plus capacity, past prices, not a forecast).
In September 2026, a 1 MW / 2 MWh battery earned the most from day-ahead energy arbitrage in RECO, $1,743 (80% of the $2,179 perfect-foresight schedule; $2,736 for a 4-hour battery), and the least in AECO, $1,230. Capacity revenue at the 2028/29 clearing price added $2,876 in every zone, 62% of the $4,619 total in RECO (energy arbitrage plus capacity, past prices, not a forecast). PJM frequency re