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There's no indication that more stalls are planned, just a battery. Presumably the battery will save them money by reducing demand charges on their electric bill.
I noticed last week there's some construction finally at this station. It's Rhode Islands Only Supercharging Station. It's the busiest in the area on weekends. Be prepared to to wait on weekends. They have room 2 more stalls and hopefully will go to the newer fast V3 Chargers
FYI contractors are onsite today at the existing East Greenwich, RI supercharger location related to the proposed battery storage installation at this site. Staff from Tesla Energy and our favorite RI-based construction company are there.