CWLP - City Water Light & Power

Illinois Utility Interconnection & net metering rules

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Net Metering AllowedYes
NEM TypeAnnual
Line Taps AllowedNo
Load Taps AllowedNo
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
Yes
NEM Type
Annual
TOU Utility
No
Post Solar Billing Method
Net Metering
Solar Export Type
Fixed kWh
Net Excess Generation Notes

CWLP provides the customer full retail rate for all solar production through the use of a net meter. If the array is producing more power than is needed in the building, the net meter increments in reverse. If the array produces more electricity than the building consumes during the billing period the customer is billed for zero (0) kWh and the excess is saved for future use. All saved excess production is lost after the March billing cycle every year. 

Rebates Offered
Yes
Deregulated
Yes
Allows Standby
Yes

Interconnection & taps

Approval Req To Install
Yes
Line Taps Allowed
No
Load Taps Allowed
No
Tap Criteria
  • CWLP doesn’t allow the use of insulation piercing connectors (Load/Line taps)
Automatic Transformer Upgrade Size
0

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

Metering & disconnect

Production Meter Required
Yes
Production Meter Position
Inv-PM-Disco-POI
Production Meter Labeling
Production Meter
AC Disconnect Required
Yes
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs
  • AC disconnect must be accessible to the utility 24/7
  • Production meter required. Must be from the approved list of meters.
SLD Reqs

Meter Orientation = Over/Under

  • USE PV METER MODEL: MILBANK U6193-RL-QG-AMS SINGLE PHASE NEMA 3R 600V/100A FORM 2S MILBANK 6193 125A RINGED BIDIRECTIONAL PV PRODUCTION METER
  • INV ----> TOP PM ---> BOTTOM PM --> DISCO ---> POI
  • Example line diagrams are attached to database files
  • Bond the neutral and ground in the main service.

BATTERY

  • Utility requires push button DC disconnect: EA-353-359MFG: Square D, Control Station, Mushroom Push Button, Turn Release, 10A, Nema 4X, MFG SKU: XALK178
Meter Num Req SLD 3LD
No
ESID Num Req SLD 3LD
No
Electrical Diagram Notes

All Jobs [AC disconnect must be accessible to the utility 24/7]

Website
link

Other details

Revision Required
No
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with CWLP - City Water Light & 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.