No, you may use any contractor of your choice. If you are searching for a solar or storage contractor, we recommend that you visit the Energy Sage platform, which is an excellent resource for information and obtaining quotes from local contractors. Moreover, for heat pumps, we recommend using a contractor associated with the NYS Clean Heat Statewide Heat Pump Program, the MA CEC Ground-Source Heat Pump Installers List, the MA CEC Participating Air-Source Heat Pump Installers List, or the MA CEC Installers Directory.