Cleanview

Planned battery storage projects in Maine

Developers have proposed 2 battery storage projects in Maine with 0.0 GW of capacity, in the grid operators' interconnection queues.

  • Planned2

See operating battery storage projects in Maine

PortlandBangorAugusta

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

The largest planned battery storage projects in Maine

Planned, by capacity

#Battery storage projectExpected onlineCapacity
1South Portland ESS, LLC202710 MW
2Sanford ESS, LLC20275 MW

Planned battery storage projects expected online soonest in Maine

In the next 18 months, soonest first

#Battery storage projectExpected onlineCapacity
1South Portland ESS, LLC202710 MW
2Sanford ESS, LLC20275 MW
The developer behind each project is on paid plans. See plans

How Cleanview tracks battery storage projects

Operating battery storage projects come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about battery storage projects in Maine

How many battery storage projects are planned in Maine?
Developers have proposed 2 battery storage projects in Maine with 0.0 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned battery storage project in Maine?
South Portland ESS, LLC in Cumberland County, Maine is the largest planned, at 10 MW. It is expected to come online in 2027.
Who is developing battery storage projects in Maine?
Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

More energy trackers for Maine

Planned battery storage projects in other states

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