Commercial Solar Net Metering

Net Metering is available to residential, commercial, and industrial customers owning and operating renewable generating facilities for the purpose of offsetting all or part of the customer’s own electric needs.

TMLP currently has two net metering categories, the 1st is for customers with generating systems of 60kW or less and the 2nd is for customers with generating systems between 60kW and 2,000kW.

Individuals interested in building renewable generating facilities within the TMLP service territory and not fitting this description should contact the TMLP to discuss the possibility of a Purchase Power Agreement. Please contact TMLP’s Lead Resource Analyst at 508-824-3132.

To qualify for our Net Metering program:

  1. The size of the total system may not exceed the customer’s highest peak demand for the preceding 12 months.
  2. Customer must own the solar array (Leasing is not allowed). Copy of customer-contractor executed agreement required prior to receiving approval to build.
  3. Projects must be approved by TMLP prior to installation.
  4. Projects must also be completed by licensed electricians and professional, licensed contractors.
  5. Customer must sign a net metering agreement and an interconnection agreement (documents available below)
  6. 1-line diagram must be designed and state, “AC Disconnect will be no further than 4’ from utility meter”.
  7. Customers who intend to also install a battery backup system alongside their solar installation must also submit the Battery Backup Verification Form (document available below). 1-line diagram must show battery backup, include battery product technical data sheet, and include copy of city/town wire inspector’s approval of referenced battery backup system.
  8. The availability of net metering to a customer is subject to the terms and conditions contained in the Net Metering agreement and/or tariff.
  9. TMLP may limit the cumulative generating capacity of all such facilities in its service territory and the availability of this service.

More Information and Applications

Net Metering & Solar Rebate FAQ

Net Metering Application

Net Metering Interconnection Agreement

Net Metering Interconnection Standards

Net Metering Tariff For 60kW – 2000kW

Battery Backup Verification Form

Solar Rebate FAQs

A. The solar rebate is currently $ .60 per watt of the nameplate KW rating of the proposed system, up to 7.5 KW for a maximum rebate of $4,500. DOER is matching at $.60 per watt installed, up to a maximum rebate level of $4,500 totaling a maximum rebate of $9,000. Rebates will equal no more than 1/2 the installed cost of any system.

A. No, at this time we are only offering the DOER MLP Solar Rebate Program to residential customers.

A. You can apply for and install any size system. TMLP will analyze larger proposed residential solar installations under the initial project review to insure compatibility with TMLP system.

A. You can install any size system up to 60 KW. For larger systems of 61KW to 2000KW, maximum system size cannot exceed the customer's prior 12 months peak demand to qualify for net metering and also requires a Distribution System Impact Review. Anything greater than that and a Purchased Power Agreement (PPA) must be negotiated with the TMLP.

A. Only one rebate per customer is allowed under the solar rebate program. If you choose to add to an existing system, it must be reviewed and approved by TMLP.

A. No, only one (1) rebate per customer of record regardless of how many owned properties within the TMLP service territory.

A. No, a residential customer applying for a rebate and net metering must own the property and the solar system and have an active account at the location with TMLP with no arrears. Any power generated from a third party would have to be purchased by TMLP and would constitute a purchased power agreement. The same applies for a commercial customer.

A. Again, most of these companies that "don’t do business" with TMLP want to lease you the system to lower your bill, and they take the net metering revenue. That translates into them being a generator to TMLP and that is prohibited by law unless defined by a specific purchased power agreement with TMLP.

A. No, energy generated from a solar system must be applied to the meter of the account holder of record. Applying the energy usage to another account or property is not permitted as that is considered retail wheeling and not allowed in TMLP service territory.

A. If the electricity generated by the Customer exceeds consumption and is distributed back to TMLP during the billing period, then the Customer shall be billed for the same monthly service charge as applied to other customers of the TMLP in the same rate class; not be charged any kilowatt-hours taken from TMLP and shall be credited for the net excess kilowatt-hours generated as applied to the generation and Power Cost Adjustment (PCA) charges during the billing period; with this kilowatt-hour credit appearing on Customer’s bill for the following billing period.

(Consumption from TMLP) - (Excess Generation put onto the TMLP Grid) - (PCA Cost) + (TMLP Monthly Service Charge) = Your Invoice Amount

A. Yes, this the new requirement for participating in the TMLP & DOER MLP Solar Rebate Program. TMLP must claim and retire the Renewable Energy Certificates.

Details of the program are located at

A. After final review and inspection by TMLP, you should receive your TMLP rebate check within 6 to 8 weeks. Energy New England will be issuing the DOER portion of the rebate.

*Please note customer will receive 2 rebate checks (1 check from TMLP but the other check from ENE on behalf of the DOER) depending on how long it takes to receive the DOER money. Please allow 6 to 8 weeks for processing and payment.

A. No. The rebate check must be payable to the TMLP customer of record where the system was installed.

A. No, TMLP does not install the system nor recommend contractors to do the installation as we are a municipal entity and prohibited by law from doing so. TMLP provides the net meter at the end of a project and inspects the completed system.

A. If a residential or commercial customer sell their house or commercial property with an active solar / net metering system, the new owner would need to sign TMLP's "Net Metering Interconnection Agreement" in order for the new owner to actively generate electricity and participate in the TMLP Net Metering program.