If you come up via 684 to 84 you should be able to make it to Manchester no problem (providing you leave NYC with a 90-100% charge. You will only need about 30 minutes or so there to make it to Boston. There is much less traffic that way than on 95. But if you take 95 you might need to stop in Milford because NYC to East Greenwich, RI is doable, but a little too close for comfort, in my opinion.
Or West Hartford, if you don’t start with 90-100%. I like taking the Merritt to CT-8 to 84 to West Hartford or Manchester.