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Massachusetts ​Net Metering

In this section you will find information pertaining to common questions about net metering. 

The Eversource Net Metering program is a renewable rate program available to customers using their own renewable energy source to generate electricity.

Net Metering

If you are installing distributed generation (e.g., solar panels), or already have a generator, you may be eligible for net metering, a method of measuring the energy consumed and produced by a customer’s generating facility. If you are a customer applying for electrical interconnection, and you want to be considered for net metering, you must also submit the net metering application.

Net Metering is the process of measuring the difference between electricity delivered by Eversource to the customer and electricity generated by the customer with a Class 1, Class 2 or Class 3 net metering facility and fed back to Eversource.

Net metering allows a customer to reduce the amount of energy purchased from an energy supplier and receive compensation for excess energy (exported energy to the grid) produced by the customer's on-site generator.

View the net metering tariff, approved by the Massachusetts Department of Public Utilities.

The Green Communities Act provides for three classes of net metering customers:


Class I Class II Class III
Customer Class Solar, Wind, Anaerobic Digestion or Agricultural Solar, Wind, Anaerobic Digestion or Agricultural Solar, Wind Anaerobic Digestion or Agricultural
kW 60 kW or less Greater than 60 kW up to 1,000 kW Greater than 1,000 kW up to 2,000 kW
Net Metering Credit Calculation Credit excess generation, by TOU period if applicable, for all kWh rate components including default service except DSM & renewables.
Credit excess generation, by TOU period if applicable, for all kWh rate components including default service except DSM & renewables.
Credit excess generation, by TOU period if applicable, for all kWh rate components including default service except Distribution, DSM & Renewables.
Calculation Exceptions - - If municipal then also credit distribution kWh rate.
Limits Aggregate capacity shall not exceed 4 percent of Eversource's distribution peak for private facilities and ​5 percent for municipal facilities.

Class 1 customers whose generation is not solar, wind, anaerobic digestion or agricultural will continue to receive the average loss-adjusted monthly clearing price set by ISO New England. These customers must submit proof to Eversource that they are a FERC Qualifying Facility.

Important Documents or Links

Historic Information & Net Metering Information

The net metering provision, as approved in Massachusetts, allows up to 7 percent of the Distribution Company’s highest historical peak load for Private facilities and 8 percent of the highest historical peak load for Public facilities.

Eastern Massachusetts

  • Highest Historical Peak Load: 4,978 MW (July 22, 2011)
  • ​Seven Percent Private Net Metering Cap: 348.46 MW (7 percent of highest historical peak load)
  • ​Eight Percent Public Net Metering Cap: ​398.24 MW (8 percent of highest historical peak load)

Net Metering Totals as of October 5, 2017

  • ​Seven Percent Private Net Metering Cap (​348.36 MW cap):
    • Projects Online: ​​184.61 MW
    • Projects with Applications Submitted: Visit massaca.org.
  • ​Eight Percent "Public" Net Metering Cap (​398.24 MW cap):
    • Projects Online: ​​​176.77 MW
    • Projects with Applications Submitted: Visit massaca.org.

Net Metering Credits: Calculation of the retail rate class Net Metering Credits by the three classes of Net Metering Facilities.

Western Massachusetts

  • Highest Historical Peak Load: ​854 MW (August 2, 2006)
  • Seven Percent Private Net Metering Cap: 59.78 MW (7 percent of highest historical peak load)
  • Eight Percent Public Net Metering Cap: 68.32 MW (8 percent of highest historical peak load)

Net Metering Totals as of ​​​​​​​​​​​​​​​October 1, 201​7

  • Seven Percent Private Net Metering Cap (​59.78 MW cap):
    • Projects Online: ​​​​​​​​​​27.963 MW
    • Projects with Applications Submitted: Visit massaca.org.
  • Eight Percent "Public" Net Metering Cap (68.32 MW cap):
    • Projects Online: 31.148 MW
    • Projects with Applications Submitted: Visit massaca.org.

Net Metering Credits: Calculation of the retail rate class Net Metering Credits by the three classes of Net Metering Facilities.

Sample Net Metering Bills

Frequently Asked Questions

I’m a Host Customer. Where would I find my net metering credits on my net metering bill?
Your net metering credits will appear under “Other Charges or Credits” on your current month’s bill. The line item will state “Net MtrCrdt" with both the kWh usage and the rate displayed.

Example 1

I’m a Host Customer. Where on my net metering bill would I find the amount of net metering credits that were transferred to an Allocatee?
On the Host Customer bill, the section, "Other Charges or Credits," contains the detail for the individual "Transfer Amounts" of net metering credits that ware being transferred during the current month to the Allocatee accounts as specified in the Host Customer's completed Schedule Z form. It also details any remaining Net Metering Credit.

Example 2

How do I know the amount of excess generation for the current bill?
Finding the difference between the actual read on last month's bill and the actual read from the current bill would give you the number of kWh used to calculate the net metering credit for the current month. This information can be found under "Electricity Used" on your bill as “Billed Use." A net negative number for Billed Use indicates excess generation.

Example 3

I’m an Allocatee Customer. Where would I find my net metering credits on my net metering bill? 
On the Allocatee Customer’s bill, the section, "Other Charges or Credits," contains the amount of the net metering credit transferred from the Host Customer’s account (“Transfer Amount”), and the amount of that credit that was applied towards the Allocatee’s supplier balance (“Transfer to Supplier Bal"), and any associated sales tax and late payment charges as outlined in the example below.

Example 4

Why has the "Other Charges and Credits" amount on the Host Customer’s bill been different from credits appearing on the Allocatee’s bills for the same month?
Prior to April 2014, credits earned by the host account were not reported as a transfer on the Allocatee customer's bill until the month after the Host customer credit was reported. This process has been changed, and the net metering credit earned by a Host customer during a billing cycle is applied to the electric bill of the Allocatee customers that same billing cycle. Host customer credits are applied to their account in the same billing cycle also.

How do I know how much of the net metering credit is available to be allocated each month?
The amount available to be allocated is equal to the current month's net metering credit less any Host Customer's charges. The calculation for the net metering credit is a line item under "Other Charges or Credits" and host customer charges are indicated under "Cost of Electricity." More information is also available in the Net Metering Tariff.

How much of the credit will each Allocatee receive?
Eversource requires the Host Customer to have an approved Schedule Z on file. The Allocatees and allocation percentages are designated on the Schedule Z form by the Host Customer. The Host customer bill will reflect the allocation percentages, Allocatee account numbers and credit amounts in the "Other Charges or Credits" section.

Interested in installing a solar photovoltaic system at your home or business in the Boston area?
Certain areas of the Eversource electric distribution system in the City of Boston and the surrounding area may present challenges for interconnecting a solar PV system.

Eversource customers in this region, known as the Area Network, should be aware that while some locations may be able to accommodate a solar PV system interconnection, other locations may be less suitable.

Please read our Important Notice to Eversource Customers located in the Boston Area Network and Surrounding Regions for more information.

What is the Market Net Metering Credit?
This is a new credit applied to certain customers who install solar generation after Sept. 26, 2016 per legislation that was signed into law in April 2016.

How will the Market Net Metering Credit be calculated?
The Market Net Metering Credit is equal to 60 percent of the distribution, transmission, transition and Basic Service rates per kWh.

When does the new Net Metering Credit become effective?
The Market Net Metering Credit is effective September 26, 2016.

Will all customers receive the New Market Net Metering Credit?
No. Customers who install solar will be exempt from the Market Net Metering Credit if they:

  • Submitted an Application for Cap Allocation (ACA) by September 26, 2016 at 2 p.m.
  • The ACA was deemed completed by the Administrator of System of Assurance
  • The cap allocation was granted by January 8, 2017.

What credit do I get if I am exempt from the new Market Net Metering Credit?
You will continue receiving Net Metering Credits at 100 percent of the distribution (where applicable), transmission, transition and Basic Service rates for 25 years from the date of when your Solar Net Metering Facility goes online.

Does the 25 year limitation apply to all exempt customers?
No. The following customers are exempt from the Market Net Metering Credit for an unspecified number of years until there is a change in the statutory regulations:

  • Host customers that are designated by the Department of Public Utilities as a Net Metering Facility of a Municipality or Other Governmental Entity.
  • A Class I Net Metering Facility that has a nameplate rating equal to or less than 10 kW on a single-phase circuit; or 25 kW on a three-phase circuit.

When am I eligible to receive net metering credits?
You will be eligible to receive net metering credits only after your unit is authorized to be online and you have provided:

  • Evidence that you have received a Cap Allocation from the Administrator of the System of Assurance (see MassACA's website). Simplified systems (less than 10 kW AC single phase and less than or equal to 25 kW AC three phase) are exempt from the Cap Allocation requirement;
  • A complete and accurate Schedule Z;
  • For agricultural net metering facilities, a determination from the Commissioner of the Department of Agricultural Resources that a business is an agricultural business and that the net metering facility is operated as part of that business; and
  • For anaerobic digestion net metering facilities, a determination from the Department of Energy Resources (“DOER”), in coordination with the Department of Environmental Protection (“DEP”), that the facility qualifies under DOER’s regulations as a Class I renewable energy generating source pursuant to DOER’s Renewable Portfolio Standards regulations.

For billing, what are the two types of Net Metering accounts?
There are two types of customers, Host and allocatee. Host customers may produce excess generation. Credits from this generation may be used within the same account, or allocated to other customer accounts (via a Schedule Z form).

How is the total amount of the net metering credit calculated or determined?
In general, the net metering credit is calculated by multiplying excess generation (kWh) by the appropriate rate for each of the following charges:

  • Default service fixed charge.
  • Distribution charge.
  • Transmission charge
  • Transition charge

If I have a large credit balance due to net metering credits, can I receive a check?
No.  Class I and Class II customers with large credit balances should complete a new Schedule Z form to allocate excess net metering credits to additional electric accounts.

Per the tariff: For any Billing Period that a Host Customer earns Net Metering Credits, the Distribution Company shall allocate Net Metering Credits by applying them to a designated Customer’s account. The Distribution Company shall carry forward, from Billing Period to Billing Period, any remaining Net Metering Credit balance.

 

If I qualify, how soon would I get a check for the net metering credits? (Class III customers)
It usually takes about three weeks from the point Billing receives the meter reads to the processing of a check by Accounts Payable.

How many times may I submit a new Schedule Z?
A new schedule Z may be submitted twice in a calendar year.

Who qualifies as a Public Entitiy?
Only the Department of Public Utilities (DPU) can classify participants as municipalities, other government entities or public entities. There is no self-designation available.

  • To receive this classification, a participant must file an application with the DPU. The application and instructions are available on the MassACA website.  Once approved, the DPU will assign a public entity classification number.

When is a public entity required to obtain official classification from the Mass. Department of Public Utilities?
There are three situations where a municipality or other government entity would need to obtain a classification number from the DPU:

  • The public entity wants to apply for net metering.
  • The public entity is already taking advantage of net metering.
  • The public entity is going to receive net metering credits from a different public entity.

Can I allocate to an Eversource gas account or an Eversource electric account in a different service territory?
No. Net metering credits can be allocated to other electric accounts within the service territory and ISO load zone of the Host Customer account consistent with Section 1.07 of the Net Metering tariff.

Can a customer close their account to cash out the net metering credits?
No. If a customer closes their account, the residual net metering credit will be used to offset net metering recovery surcharges for all customers.

Can a customer partially cash out their credits?
Net Metering Credits will not be cashed out either in full or partially.

Are net metering credits applied or credited to basic service and/or alternate supplier charges?
Yes, if the net metering credit is large enough, it is used to pay off the Host Customer’s distribution and supplier balances in full. If the net metering credit is not large enough to fully pay off the Host Customer’s bill and there is a supplier balance, the credit is split 50/50 for non-low income customers and 35/65 for low income customers.

If there is no supplier balance, e.g. the current supplier balance is zero, and the customer does not allocate the credit, it remains on the distribution portion of the account.

What is the Market Net Metering Credit?
This is a new credit applied to certain customers who install solar generation after Sept. 26, 2016 per legislation that was signed into law in April 2016.

How will the Market Net Metering Credit be calculated?
The Market Net Metering Credit is equal to 60 percent of the distribution, transmission, transition and Basic Service rates per kWh.

When does the new Net Metering Credit become effective?
The Market Net Metering Credit is effective September 26, 2016.

Will all customers receive the New Market Net Metering Credit?
No. Customers who install solar will be exempt from the Market Net Metering Credit if they:

  • Submitted an Application for Cap Allocation (ACA) by September 26, 2016 at 2 p.m.
  • The ACA was deemed completed by the Administrator of System of Assurance
  • The cap allocation was granted by January 8, 2017.

What credit do I get if I am exempt from the new Market Net Metering Credit?
You will continue receiving Net Metering Credits at 100 percent of the distribution (where applicable), transmission, transition and Basic Service rates for 25 years from the date of when your Solar Net Metering Facility goes online.

Does the 25 year limitation apply to all exempt customers?
No. The following customers are exempt from the Market Net Metering Credit for an unspecified number of years until there is a change in the statutory regulations:

  • Host customers that are designated by the Department of Public Utilities as a Net Metering Facility of a Municipality or Other Governmental Entity.
  • A Class I Net Metering Facility that has a nameplate rating equal to or less than 10 kW on a single-phase circuit; or 25 kW on a three-phase circuit.

​Contact Eversource

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Schedule Z documentation can be mailed to:

Eversource Energy
Attention: Eversource EM DG
​247 Station Drive
Westwood, MA 02090

Simplified Apps: 781-441-8285
All Other Apps: 781-441-3409

Schedule Z documentation can be emailed to:

emdg@eversource.com

For Net Metering Billing questions call a Customer Care Representative:

Residential: 800-592-2000
Business: 800-340-9822

Schedule Z documentation can be mailed to:

Eversource Energy 
Attention: Eversource WM DG 
55 Russell Street 
Hadley MA 01035-9455

413-787-1087

Schedule Z documentation can be emailed to:

wmdg@eversource.com

For Net Metering Billing questions call a Customer Care Representative:

Residential: ​888-​783-​6616
Business: 888-783-6610