Requirement Summary
This measure can be claimed when smart metering is provided in each unit of the building. The owners may subscribe to an online monitoring system or install a Home Electricity Management System (HEMS), which requires little additional equipment installation. Note that this measure cannot be claimed when 'prepaid meters' are installed as they are not considered smart meters under EDGE.
The smart meter must be able to show readings of the last hour, last day, last 7 days and last 12 months of usage data, and the devices should be accessible within the home. Other objectives of the smart meters and / or HEMS are:
- Measure home electricity use and real power;
- Analyze measurements;
- Relatively low price per home;
- The smart meters solution must be workable in offline households with no web dependency.
Intention
The intent is to reduce energy demand through increased awareness of energy consumption. With smart meters, end-users can appreciate, understand, and contribute to responsible use of energy in the building. Smart meters can display measurements and recommendations.
Approach/Methodologies
When smart meters are installed in each unit of the building, end-users receive immediate feedback that can result in 10 to 20% energy savings, as they are able to identify consumption in more detail than with conventional meters.
Potential Technologies/Strategies
Smart metering is designed to provide occupants with information on a real-time basis about their domestic energy consumption. This may include data on how much gas and electricity they are consuming, the costs, and the impact of their consumption on greenhouse gas emissions.
A detection unit (the transmitter) is affixed to an existing utility meter and tracks energy use. The display unit receives a wireless signal from the transmitter and displays the consumption information in real time and cost for the end user. Many companies also offer online monitoring systems which require little to no additional equipment installation.
The benefits of smart metering include controlling demand; improving equipment performance by signaling the need for preventive maintenance or repairs; optimizing operational efficiency with controlled costs; and maximizing property values.
For best results it is recommended that separate smart meters be used for different uses, i.e. lighting, cooling, heating, hot water, and plug loads. This will offer better visibility of energy usage and therefore better management. Some design considerations for an optimal HEMS are as follows:
- Include a utility-grade power meter, with network interface to home broadband router, or access to cloud based data analysis, as an option;
- Consider an inductive power meter (clamp-on sensor) with wireless Home Area Network (HAN) connection to in-home display (IHD) or web browser; and
- Use an interface to utility electricity meter for data acquisition, data storage in logger device, HAN connection to IHD or web browser.
Relationship to Other Measures
The contribution made by the measure is reflected in the common amenities portion of the energy chart. Although EDGE does not show savings in other areas of energy consumption, this measure increases end user awareness, which in the long term can help to significantly reduce energy consumption from appliances, heating, cooling, and hot water.
Assumptions
The base case assumes conventional meters, while the improved case assumes smart meters to be installed in each unit.
Compliance Guidance
| Design Stage | Post-Construction Stage |
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At the design stage, the following must be used to demonstrate compliance:
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At the post-construction stage, the following must be used to demonstrate compliance:
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