(last update: 9/20/22)
CMLP Solar PV Rebate: Offers a one-time rebate of $625 per kW(DC) of installed solar PV generation capacity, capped at $3,125 per service address. Residential installations up to 167 kW(AC) and commercial installations of any size are eligible. There is no expiration date anticipated for this rebate.
Steps to Installing Solar
A. Explore Options & Sign a Contract:
- ***IMPORTANT NOTE: If your property already has or you are considering installing a sub-meter - such as for an EV (electric vehicle), winter electric heating rate, etc. - please read this page and its sub-pages to familiarize yourself with the options and trade-offs when combining sub-meters with solar panels.***
- We recommend that you solicit proposals from at least three solar installers for your new solar PV system. You’ll find information to help you with this step at our Lease/Buy/Choose an Installer webpage. People who’ve already installed solar are also a good source of information about installer performance. Check online reviews, talk with people you know, or ask CMLP’s Energy Specialist Pamela Cady (firstname.lastname@example.org or (978) 318-3149) to put you in touch with Concord homeowners or businesses who’ve installed solar and volunteered to coach others.
- When soliciting proposals from solar installers, tell them you are interested in applying for the CMLP Solar PV Rebate. Confirm that they’re familiar with the CMLP Solar PV Rebate and interconnection requirements outlined in the next step.
- For large scale sites, CMLP may require paired storage:
- If prior solar capacity at that site is under 50 kW(AC) and more solar is added, battery capacity must be paired with any solar capacity in excess of 50 kW(AC). The battery capacity must be capable of storing 4 hours of electricity produced by any solar capacity in excess of 50 kW(AC), at its peak solar electricity production potential.
- If prior solar capacity at the site is over 50 kW (AC), battery capacity must be paired with any new solar capacity added. The battery capacity must be capable of storing 4 hours of electricity produced by your new solar capacity, at its peak solar electricity production potential (AC).
- In both instances, CMLP must be able to control the times of battery charging and discharging.
B. Submit Interconnection Application with Related Documents:
CMLP Solar PV Rebate and interconnection documents to be emailed by the installer to CMLP:
C. Approval to Install from CMLP:
CMLP staff reviews paperwork and, if all requirements are met, sends signed Approval to Install document to property owner and solar installer. (Note: Current CMLP electrical distribution system limitations may preclude the installation of solar arrays over 25 kW without an accompanying energy storage system. Decisions are made on a case by case basis after engineering review.) An email from CMLP with "Approval to Install" in the subject line marks successful completion of this step.
D. Install Equipment:
- Solar PV panels installed on property
- Town Building Department's Wiring Inspector visits site to give permit approval.
- CMLP's Electrician, triggered by Building Department's approval email, installs "send and receive" meter
(a brief power outage is required; new meter installed next to solar meter; property owner does not need to be on site)
E. Approval to Operate from CMLP:
- CMLP Engineer conducts final project review (on-site visit not usually needed)
- CMLP emails signed Approval to Operate document to property owner & installer
An email from CMLP with "Approval to Operate" in the subject line marks successful completion of this step.
- Property owner begins generating their own power!
F. Receive Your CMLP Solar PV Rebate:
Property owner receives one-time check by mail from Town of Concord for CMLP Solar PV Rebate (if rebate check requested rather than on-bill credit). This arrives 4 – 6 weeks after Approval to Operate email. Any rebate under $600 is issued as a bill credit. If a customer requesting a check has been in arrears frequently in the past two years, CMLP may apply all or part of the rebate as a bill credit rather than as a check. The rebate can also be directed to your solar installer to help you with cash flow.
If you have any questions, please contact:
Concord Municipal Light Plant
PO Box 1029
1175 Elm Street
Concord, MA 01742
ATTN: Pamela Cady