NEMA
5-21-14
Utility Metering vs. Submetering
Utility Meter
Meter provided by utility with the purpose of measuring an energy source
to generate a bill.
Submeter
Submetering is the installation of metering devices to measure actual
energy consumption after the primary utility energy meter.
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Key Markets
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Commercial Real Estate (owners, property manager, facility/energy manager)
 REITs
 Multi-site
 Retail
 Multi-tenant

Demand Response (CSP & Utility)

Industrial/Manufacturing/Processing (plant engineer)
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Consulting Engineers (energy efficiency program coordinators)
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Institutional - K-12 & Universities (facility manager, sustainability coordinator)
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Solar PV/Renewable Energy (monitoring provider, equip manufacturers)
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Government (regional energy managers, REMs)
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Data Center (facility managers)
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OEM (equip manufacturers)
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Why? Expected Savings
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Applications
Historical (Still Growing…)
• Tenant Billing
• Cost Allocation
• Energy Management (M&V, LEED; PV; O&M)
Growth Applications
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OEM
Critical Power (Datacenters)
Demand Response
Integrated Metering Solutions (Systems not components)
Plug Load Metering
Energy Efficiency driven by Codes and Mandates
Services for end-user driven by energy information
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Growth Applications
Metered Panels
• Existing and new electrical panels
Repurposed Building Space
• Existing buildings continue to be repurposed. When this happens,
building owners require spaces to be metered to allocate utility costs
or simply for energy efficiency (Energy Codes & Mandates)
Critical Power (Datacenters)
• Cloud computing is driving growth of 24/7 facilities where monitoring
and managing power is critical, especially with PUE (Power Usage
Effectiveness) essentially ratio of total amount of energy used by a
data center facility vs. energy delivered to computing equipment.
Energy Efficiency driven by Codes & Mandates
• From EPAct 05 to Seattle Energy Code, adoption of metering
mandates and compliance continues to expand.
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Growth Applications
Demand Response
• C&I taking advantage of utility/municipal incentives to curtail
energy use on demand.
Generation
• PV and Wind
OEM
• EVSE, Electrical Panels (including lighting), Inverters
• (DC) Telecom and PV
Plug Load Metering
• Most estimations of plug loads range from 10% to 30% of a
building's electricity use.
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Technology Trends
Integrated Platforms / Advanced Communications
• Shift to smart, network enabled meters that have advanced
communications. Even BAS moving to server based solutions.
Self commissioning preferred.
Software / Mobile Applications
• Meter isn’t enough. Customers are demanding low cost (free)
software and mobile applications that allow them to easy access
information and to configure devices.
Wireless Metering
• WiFi, Zigbee, 900MHz, Cellular. Customers want a low cost
option for cloud enable devices.
Rogowski CTs
• Easier installation; less inventory; excellent for BAS, system
integrators, ESCOs etc..
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Metering & Market Challenges
We interviewed our largest customers and asked what was most challenging
about implementing metering technology:
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Most metering projects were for main building-level metering and
installation costs were generally higher than the cost of hardware
2. Electricians did not understand communications protocol or wiring and
were not accustomed to carrying a laptop
3. Most metered spaces did not have a receptacle to power devices for
communications needs (wireless, cellular)
4. Service size and type weren’t always accurate or known
5. Panel space was often limited and CT installation proved challenging
6. Cost of communications – LAN and Cellular
7. Inability to easily share data with multiple systems
8. Need for installation and commissioning services
9. SMB users didn’t have internal expertise for continuous commissioning
10. Regulatory concerns (compliance / billing)
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Small / Medium Commercial Building
Small/Mid Size Commercial Bldgs.
• Owner needs low cost system for main energy
sources (could be multi-site need)
• Wants remote access & ability to share data
with the cloud
• Option to read data manually/download data
• Wants an open / scalable solution
HD Pulse
Module
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Where can NEMA help?
• Legislative, Regulatory, Education
• Lobbying cities to adopt submetering ordinances and mandates
• Outreach and marketing tools to boost awareness
• Example – NEMA’s Building Tool Kit
• United group to have a voice in industry regulations
• Certifications
• Example: CA W&M vs. Measurement Canada
• Forum for industry leaders to collaborate & drive growth in the industry
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Q&A
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