Eversource Energy (Eastern MA)

Massachusetts Utility Interconnection & net metering rules

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Net Metering AllowedYes
NEM TypeMonthly
Supply Side Taps AllowedYes
Line Taps AllowedYes
Load Taps AllowedYes
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
Yes
NEM Type
Monthly
TOU Utility
No
Post Solar Billing Method
Net Metering
Net Excess Generation Notes

Excess generation at the end of each month is credited at the applicable retail electricity rate and rolled forward to future bills as a dollar credit. This credit rolls forward indefinitely to future bills but cannot be "cashed out".

Rebates Offered
Yes
Deregulated
Yes
Allows Standby
Yes

Interconnection & taps

Approval Req To Install
Yes
Supply Side Taps Allowed
Yes
Line Taps Allowed
Yes
Load Taps Allowed
Yes
Automatic Transformer Upgrade Size
20
Automatic Transformer Upgrade Size Type
kW AC

System size & offset

System Size Restrictions
0
System Size Restriction Type
No Restrictions
System Size Battery Included
Yes
System Size Includes Existing Systems
No
Offset Type
No Restrictions
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
Inverter Oversize Restrictions
No
System Offset Notes


Metering & disconnect

Production Meter Required
Situational
Production Meter Criteria

Production Meter (SMART meter)

  • Required for: Cash, Loan, Aura, Aura+
  • Not required for: Lease projects
  • Wire inverter on bottom side and utility on top side
  • Only 1 production meter per project
  • Second meter allowed only if 12 months have passed since existing system PTO
Production Meter Position
Inv-Disco-PM-POI
Production Meter Labeling
Production Meter
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs
  • Show parcel boundaries (property/lot lines).
  • Show distance from UM to Eversource Transformer in feet..
  • Include Peak/Max Output
SLD Reqs
  • Projects over 15 kW AC require an EE stamp.
  • Specify make and model of equipment. Do not use “Min 60A” for a disconnect size.
  • Load Side Tap does not require 2 disconnects as long as Fused Disconnect is accessible outside.
  • Include Peak/Max Output
Electric Service Reqs
  • Follow meter wiring and labeling guidelines..
  • Allowable Meter Sockets:.
  • Will require a meter relocation whenever the utility meter is located on the interior, or in any cabinets
  • Max allowable height for the utility meter is 5'5" from grade, measured from the center of the meter.
Electrical Stamp Required
No
Meter Num Req SLD 3LD
No
ESID Num Req SLD 3LD
No
Site Plan Notes

All Jobs [AC Disconnect shall be 24/7 accessible, within 10 feet of, within visible sight of, and on same wall as the Utility Meter (Exception for pedestal meters)]

Website
link
Phone
413-787-1087

Other details

Revision Required
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Eversource Energy (Eastern MA) before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.