City of Longmont

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 If something here is out of date or missing, tell us and we'll fix it.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

Net metering & export

Net Metering Allowed
No
NEM Type
N/A
TOU Utility
No
Post Solar Billing Method
Export Rate
Solar Export Type
Fixed kWh
Solar Export Rate
0.0856
Solar Export Value Notes
System PTO'd before 1/1/2025 will have a rate of 10.40 - 11.45 cents per kWh; system PTO'd On or After January 1, 2025 will be 8.56 cents per kWh
Net Excess Generation Notes

The Longmont City Council adopted a new Value of Solar (VoS) net metering credit to compensate solar customers who generate more electricity than they use. Effective January 1, 2025, the new VoS credit will apply to customers who install a new solar system or expand an existing system. Customers who already have solar installed and received their permission to operate prior to December 31, 2024, will automatically be assigned a retail (‘Legacy’) net metering credit for 15 years (until January 2040).


Legacy Generation Credit: (Received PTO before 1/1/2025)

  • Summer: 11.45 cents per kWh
  • Non-Summer: 10.40 cents per kWh

Value of Solar Credit: (Received PTO on 1/1/2025 and after)

  • 8.56 cents per kWh
Rebates Offered
No
Deregulated
No
Allows Standby
No

Interconnection & taps

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

System size & offset

System Size Restrictions
12
System Size Restriction Type
AC kW
System Size Battery Included
No
System Size Includes Existing Systems
Yes
Offset Type
Combination
Offset Value
200
Offset Calculation Basis
Historical
Offset Calculation Period
12
Industry Standard Watts Sqft
2
Utility Specific Adjustments

If third-party owned system (TPO)

  • Expected annual production is limited to 120% of the previous year’s energy usage (kWh)

If the customer has no energy usage history (like for new homes or new owners), estimate usage

  • The estimate is 6 kilowatt-hours (kWh) per square foot per year.
  • This is based on the total finished square footage (including finished basements).
  • Square footage is taken from Boulder County records.
  • This method can also be used if the home has special electric needs (like electrification upgrades) and the usual system size isn’t enough.

Variance request allowed for oversized systems

System Size Justification
Load Justification
System Offset Notes


Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Utility Disconnect Switch
Allowed Meter Adapter
None

Plans & docs

Site Plan Reqs

Standard

SLD Reqs


Electric Service Reqs


Install Reqs


Rate Schedule Link
link
Website
link
Phone
(303) 651-8386

Other details

Revision Required
Yes
Mod Swap Requires Planset
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with City of Longmont 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.