MSC of the City of New Castle

Delaware 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 If something here is out of date or missing, tell us and we'll fix it.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 TypeMonthly
Line Taps AllowedNo
Load Taps AllowedNo

Net metering & export

Net Metering Allowed
Yes
NEM Type
Monthly
TOU Utility
No
Post Solar Billing Method
Net Metering
Solar Export Type
Fixed kWh
Solar Export Rate
0.12
Rebates Offered
No
Deregulated
No

Interconnection & taps

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

System size & offset

System Size Restrictions
25
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
No
Offset Type
Combination
Offset Value
110
Offset Calculation Basis
Average
Offset Calculation Period
24
Industry Standard Watts Sqft
2
System Offset Notes

System need to be under 25 kW for Residential, 500 kW for Non-Residential, 100 KW for Farm

25 kw for residential, 110% of last 2 years consumption

Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A
Allowed Meter Adapter
None

Plans & docs

Placards

The Generator Owner will install a warning label in a conspicuous place on their electric meter or meter box to notify the Company personnel that there is a generator source installed on the load side of the meter. The warning label shall not be placed in a location that would interfere with the ability of Company personnel to read the electric meter. The Company will provide the warning label to the Generator Owner. The warning label must be placed before the generation can be interconnected.

Website
link
Phone
(302) 323-2330
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with MSC of the City of New Castle 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.