Wellesley Municipal Light Plant

Massachusetts Utility Interconnection & net metering rules

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Tariffs and interconnection rules move often. If something here is out of date or missing, tell us and we'll fix it.

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Net Metering AllowedYes
NEM TypeAnnual
Line Taps AllowedNo
Load Taps AllowedNo

Net metering & export

Net Metering Allowed
Yes
NEM Type
Annual
TOU Utility
No
Post Solar Billing Method
Net Metering
Rebates Offered
No
Deregulated
Yes

Interconnection & taps

Approval Req To Install
Yes
Line Taps Allowed
No
Load Taps Allowed
No
Automatic Transformer Upgrade Size
0

System size & offset

System Size Restrictions
10
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
No
Offset Type
No Restrictions
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
System Offset Notes

If our proposed system is too large, they will demand that we downsize, it wouldn't be optional (regarding transformer upgrades)

Metering & disconnect

Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

refer to pg 3-4 on DG Policy

the Utility Meter is outside. If it is inside, we will need to relocate it outside.

SLD Reqs

They require a customer-owned production meter socket to be installed

refer to pg 3-4 on DG Policy

Website
link
Phone
(781) 431-1019
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Wellesley Municipal Light Plant 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.