Willmar Municipal Utilities

Minnesota 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 If something here is out of date or missing, tell us and we'll fix it.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
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
Yes
NEM Type
Monthly
TOU Utility
No
Post Solar Billing Method
Net Metering
Solar Export Type
N/A
Net Excess Generation Notes

When the energy generated by the qualifying facility exceeds that supplied by the municipality during a billing period, the municipality shall credit the customer the excess kWh at avoided cost. ($0.0306/kWh) Customer will have an option to select their post solar billing method as noted on their Uniform Contract/Interconnection Agreement.

Rebates Offered
No
Deregulated
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
Yes

System size & offset

System Size Restrictions
40
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
Inverter Oversize Restrictions
No
System Offset Notes

Systems 40 kW or less does not have any offset requirement.

Systems over 40 kW AC must be not be sized over 120% of their historical consumption.

Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
Yes
Production Meter Position
Inv-Disco-PM-POI
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Utility Disconnect Switch

Plans & docs

SLD Reqs

ADD LEADER POC/RPA; EXAMPLE

Equipment Approvals
California Energy Commission
Meter Num Req SLD 3LD
No
ESID Num Req SLD 3LD
No
Rate Schedule Link
link
Website
link
Phone
(320) 235-4422

Other details

Revision Required
Yes
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Willmar Municipal Utilities 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.