Distributed Generation

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Committed to Serving You Well
Distributed Generation
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Todays Discussion

• New State Wide Collaborative Process
• Radial, Spot Network Area Network
• Netmetering Power Purchase Contracts

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Distributed Generation Layout

• Lockable, visible disconnect switch accessible
  24/7 located at the service entrance

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Uniform Statewide Process

• Process designed by a collaborative of Mass
  utilities, vendors, government agencies
  environmental groups
• Identifies process, costs timelines
• MDTE order requires all public utilities to
  follow this process as of 4/1/04

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Process Highlights

• Two different applications and four tracks
• Simplified Application
• Simplified Track
• Simplified Spot Network Track
• Standard Application
• Standard Track
• Expedited Track

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Process Flow
10 days
10 days
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Customer Costs
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Type of Connection

• Radial Few issues with interconnection. 95 of
  our customers are served radially.
• Spot Network Larger, non-inverter based DG can
  present significant safety and reliability
  issues. Spot Networks typically serve individual,
  large customers and can be found in Boston,
  Newton, Brookline, Cambridge New Bedford.
• Area Network Currently, no known designs have
  been identified to properly address the safety
  and reliability concerns of DG on an area
  network. NSTAR has area networks in downtown
  Boston and Cambridge.

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Netmetering Power Purchase

• Netmetering
• The meter will spin forward and backward to allow
  for the difference in customer usage versus DG
  production
• Allowed for 1 billing cycle, i.e. overproduction
  cannot be carried over to the next month or next
  season
• Customers must sign a power purchase contract to
  receive payment or credit for monthly
  overproduction
• Power purchase represents the generation portion
  of the electric bill
• Netmetering allowed only for 60 kw and below

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Above 60 kw

• If any overproduction is expected
• Customer must sign power purchase agreement
• Bi-metering must be installed to record any
  overproduction

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Questions?