I highly recommend looking into the community aggregation programs. Most will offer a couple different tiers depending on how much of your electricity supply you want coming from renewable sources. They also typically lock in their rates for a longer time so they won't change twice a year.

When I lived in Boston I had signed up for it and it was definitely cheaper than Eversource. Now in Stoneham, I signed up for their 100% renewable community aggregation and even that tier is cheaper than Eversource's basic supply rate.