NorthWestern Energy Homepage
NWE Contact Bar, in Montana dial 1-888-467-2669, in South Dakota or Nebraska dial 1-800-245-6977
Important Message  Due to a system maintenance scheduled to begin at 6pm on Thursday, November 14th, our Contact Centers will be staffed for emergency purposes only on Friday, November 15th and our Walk-in Offices will be closed on Friday, November 15th. Normal business hours will resume on Monday, November 18th. Access to Online Customer Care services will be unavailable during this system maintenance.
small brandlSmall Generator Interconnection and Net Metering Information

NorthWestern Energy’s Small Generator Interconnection process (including Net Metering) is governed by Rules 16-23 of the Electric Tariff. Links to the process documents can be found in this page, as well as educational resources and application materials for renewable energy customers. 

Questions pertaining to Small Generator Interconnection may be directed to Casey Woodbury at, by telephone 406-497-4165, or at the address given below. 

NorthWestern Energy
Attn: Casey Woodbury
11 E. Park St.
Butte, MT  59701-1711

Small Generator Interconnection and Net Metering Process Documents
Level 1 Small Generator Interconnection Request – This document will be utilized to facilitate the application process for small generators (including net metering customers). A non-refundable processing fee of $200 must accompany this request.

Level 2, 3 and 4 Small Generator Interconnection Request – This document will be utilized to facilitate the application process for small generators under the level 2, 3 or 4 process. A non-refundable processing fee or deposit must accompany these requests (see below).
  • Level 2 Interconnection Request - $500 Request Fee
  • Level 3 Interconnection Request - $200 Request Fee
  • Level 4 Interconnection Request - $1,000 Deposit

  • Rule 16 – Net Metering Terms and Conditions  – Contains the applicability, terms and conditions, and additional relevant information for net metering customers.

    Rule 17 - Small Generator Interconnection Procedures – Details regarding procedures and timelines associated with this process.

    One Time 12-Month Billing Period Change Form  – If you are a current net metered customer and want to make a change to your 12-Month Billing Period, this is a one-time option during the time that you have a net metering agreement with NorthWestern Energy.
    Small Generator Interconnection Resources
    Qualified Installers for Solar PV and Small Wind Generation – Renewable energy companies that meet our professional, safety and independent contractor standards for renewable generation installations.
    If you are a contractor or consultant/designer or engineer/architect and would like to become a Qualified Solar PV or Small Wind Installer, click here to learn about qualifications and training opportunities.

    Consumer Guides
    Review the many resources provided to help you make informed decisions on your energy projects. Because the Guides contain a number of pictures, they may take a minute or two to download.
    The Montana Consumer Guide to Small Wind Generation Systems
    The Montana Consumer Guide to Grid-Interactive Solar PV Systems
    The Montana Consumer Guide to Solar heating Systems
    The Montana Consumer Guide to Micro-hydro Systems
    Contact Us | Terms of use | Glossary | PO Terms & Conditions | EEO | ©2016 NorthWestern Energy. All rights reserved.