Eighteen battery storage projects totaling more than 1,650 megawatts are proposed across Long Island. They’ve been proposed to help meet New York State’s six-gigawatt energy storage goal, a program the state says will store renewable generation “for the times it is needed most,” firming intermittent solar and wind into steady power.
That belief that batteries store renewable energy is the basis for nearly everything that follows. It’s the basis for a statewide subsidy program modeled on renewable energy credits, whose costs are allocated across the utilities, LIPA included. It’s the basis for the 15-year property tax exemption the legislature wrote for solar and wind, and for the federal government’s “Clean Electricity Investment Credit.” And it’s the pitch developers bring to town boards from Islip to Mastic.
None of those benefits, state or federal, is conditioned on where the electricity actually comes from. So it’s worth asking the question the incentives never ask: when these batteries charge, what generates the power going into them?
On Long Island, the answer, overwhelmingly, is natural gas, 91% of the time (according to NYISO’s own marginal-emissions data). Not just now, but likely for the lifetime of these projects: our modeling finds New York would need 11 to 15 gigawatts of added utility-scale solar (not rooftop or community-scale), some twenty times the grid-scale fleet it has built to date, and roughly double everything waiting in NYISO’s interconnection queue, before charging windows are even half renewable. And long before that, added solar changes when batteries charge, not what they charge from.”
