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CMP - Central Maine Power

Maine Utility Interconnection & net metering rules
Net Metering Allowed1
NEM TypeAnnual
Line Taps Allowed1
Load Taps Allowed1
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
1
NEM Type
Annual
TOU Utility
1
Post Solar Billing Method
Net Metering
Solar Export Type
N/A
Net Excess Generation Notes

If the electricity generated during the billing period by the eligible facility plus any kilowatt-hour credits from prior billing periods exceed the customer's or the shared financial interest customers’ kilowatt-hour usage during the billing period, the excess shall be applied to the customer's bill or the shared financial interest customers’ bills for the following billing period as a reduction in the customer's kilowatt-hour usage.

Rebates Offered
0
Deregulated
1
Allows Standby
1

Interconnection & taps

Approval Req To Install
Yes
Interconnection Level
3
Line Taps Allowed
1
Load Taps Allowed
1
Tap Criteria
  • Branch preference: If the house has Meter Main, load side tap vs breaker tie in in the MSP inside the house.
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
1

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
No Restrictions
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
Offset Calc Tool
N/A

Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect
Meter Spot Required
0
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

All Jobs:

  • PORTRAIT HIGHLY PREFERRED FOR ALL PROJECTS (EXCEPT CASH/MOSAIC ON COMP SHINGLE)
  • 8 MODS PER STRING MINIMUM; 15 MAXIMUM
SLD Reqs
  • Line Diagram (Level 2-4 must be PE stamped, level 2 is 25kW - 2MW) 


Electrical Stamp Required
0
Meter Num Req SLD 3LD
1
ESID Num Req SLD 3LD
0
Site Plan Notes


Electrical Diagram Notes


Website
link

Other details

Restrict Inspection
0
Revision Required
1
Mod Swap Requires Planset
1
Address ID
975270
Express Planset Eligible
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with CMP - Central Maine Power 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.