Western Illinois Elec Coop

Illinois 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 If something here is out of date or missing, tell us and we'll fix it.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 AllowedNo
Line Taps AllowedNo
Load Taps AllowedNo
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
No
TOU Utility
No
Post Solar Billing Method
Export Rate
Solar Export Type
Avoided Cost
Solar Export Rate Approx
0.03
Solar Export Value Notes
Changes monthly/annually or as needed
Net Excess Generation Notes

With Net Billing, members using a renewable energy system first utilize their generated power at their location, getting full retail value for those generated kilowatt-hours (kWh). Any time the renewable energy system is producing more energy than the location is using, the excess energy is sent to WIEC electric grid. At the end of the month, WIEC pays the member for that excess energy at our on-peak wholesale energy rate which is set annually by Prairie Power Inc. (Current rate: $0.03 / kWh)

Rebates Offered
No
Allows Standby
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
100
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
No
Offset Value
0
Offset Calculation Period
0
Industry Standard Watts Sqft
2
Inverter Oversize Restrictions
No
System Offset Notes

100 kW AC or 110% offset of their historical usage, whichever is less

  • If 12 months of data is not available, the average amount of energy may be reasonably estimated by the Cooperative
  • The utility will inform the customer when they meet up with them what the maximum system size is allowable


Customers with electrical heating is not able to move forward with Solar. Please have the customer contact the utility. (Rates 40, 41, 403 and 413)

Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
AC Disconnect Required
Yes
AC Disconnect Labeling
Visible Lockable Labeled Disconnect

Plans & docs

Equipment Approvals
California Energy Commission
Meter Num Req SLD 3LD
No
ESID Num Req SLD 3LD
No
Rate Schedule Link
link
Website
link
Phone
(800) 576-3125

Other details

Revision Required
Yes
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Western Illinois Elec Coop 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.