Cost Modifiers

In addition to the customer selectable packages, the program has these site-specific cost modifiers:

  • Small Systems (under 16 panels): $0.75 per watt for increased balance of systems
  • Very Small Systems (12 panels or fewer): individually priced
  • Large Systems (30 panels or more): $0.25 discount
  • Detached Building: individually priced
  • Pole or Ground mount racking: $0.95 per watt, system must be 20 panels or greater
  • Electrical trenching from detached building: individually priced   
  • Tree removal: individually priced, per a 3rd party arborist     
  • Non-adjacent arrays: $600 fixed adder, for each additional array section
  • Membrane roof: $0.45 adder per watt for attached racking
  • Membrane roof ballast racking: $0.20 adder per watt, available for systems 16 panels or greater only
  • Standing seam metal roof: $0.05 adder per watt
  • Slate and tile and metal shingle roof systems: individually priced
  • Walk-able roof discount: $0.10 discount  per watt for roofs 5/12 pitch or lower
  • Very steep roof: $0.10 adder per watt for roofs 10/12 pitch or steeper     
  • Reinforcing rafters: $40 adder per rafter, for wood frame pitched roofs with attic access only
  • Relocation of vent pipe: $400 fixed adder, pitched roofs, PVC pipe with attic access only

  • Electric panel upgrade: $1,200 fixed adder, as needed if existing is undersized or older
  • Electrical service upgrade: $2,400 fixed adder, as needed if existing is undersized
  • Electrical sub-panel: $400 fixed adder, may be required if panel is full
  • Combiner panel for multiple inverters: $200 fixed adder
  • Interior conduit run: no charge, as is included when possible on every system
  • Automatic SREC reporting to the Mass PTS: $500 fixed adder for systems employing a single SolarEdge inverter. $1,200 for 3rd party meter when needed, such as multiple inverters.
  • System Monitoring: no charge, as is included on every system
  • Snow Guards: $60 per panel, as requested by customer or suggested by SunBug. 4 panel minimum
  • Critter Guards: $30 per panel, as requested by customer or suggested by SunBug. Full perimeter only
  • Extended inverter warranty (25 years): $0.10 adder per watt, as requested by customer

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