Solar Sanity Checksolar, decoded Independent. Nothing you type leaves your browser.

Merrimac Municipal Light Department

Massachusetts Utility Interconnection & net metering rules
Net Metering Allowed0
Line Taps Allowed0
Load Taps Allowed0
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
0
TOU Utility
0
Post Solar Billing Method
Export Rate
Solar Export Type
Other
Solar Export Value Notes
Non-Export utility
Net Excess Generation Notes

No NEM/Non-Export Utility

Rebates Offered
0
Deregulated
1

Interconnection & taps

Approval Req To Install
Yes
Interconnection Level
3
Line Taps Allowed
0
Load Taps Allowed
0
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
0

System size & offset

System Size Restrictions
0
System Size Restriction Type
No Restrictions
System Size Battery Included
0
System Size Includes Existing Systems
0
Offset Type
Percentage
Offset Value
100
Offset Calculation Basis
Historical
Offset Calculation Period
12
Industry Standard Watts Sqft
2
Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

Standard

SLD Reqs

Standard

Electric Service Reqs

AC Disconnect Required and must be located within line of sight of the utility meter

Electrical Stamp Required
0
Equipment Approvals
California Energy Commission
Meter Num Req SLD 3LD
0
ESID Num Req SLD 3LD
0
Website
link
Phone
(978) 346-8311

Other details

Restrict Inspection
0
Address ID
128160
Express Planset Eligible
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Merrimac Municipal Light Department 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.