What is ECHONET?

What is ECHONET?

ECHONET is a communication protocol designed to create the “smart homes” of the future. Today, with Wi-Fi and other wireless networks readily available in ordinary homes, there is a growing demand for air-conditioning, lighting and other equipment inside the home to be controlled using smartphones or controllers, or for electricity usage to be monitored in order to avoid wasting energy.

To achieve this kind of low-energy, comfortable, safe and reassuring lifestyle, we first need to create a system of rules or a “communication protocol” that can be read by any manufacturer’s equipment. This is where ECHONET comes in.

The ECHONET Lite specification, in particular, is a communication protocol compatible with the now ubiquitous Internet. It is designed for ease of use and is simpler than the ECHONET specification.

The ECHONET Lite specification is already compatible with more than 100 types of device, and is also being adopted by the smart electric energy meters that will be installed in all households in future.

Introduction of ECHONET (8 min.)

Changes in the environment surrounding smart home

After reaching a peak in FY2004, the energy consumption in Japan has been on a downward trend. This is due to economic growth while curbing energy consumption as Japanese energy consumption moves towards energy saving, particularly in the industry sector, and the development of energy saving products has become popular.

However, when looking at trends by sector for growth between FY1973 (at the time of the oil embargo) and FY2018, while there was a slight increase (1.0 times) for the commercial and business sector with the progress in energy saving, mainly in the manufacturing industry, as a result of the significant rise in energy consumption (1.9 times) in the household sector, its share against the total consumption has changed from 8.9% to 14.0%.

Source: Ministry of Economy, Trade and Industry / Agency for Natural Resources and Energy–Japan’s Energy White Paper 2020

In response to the tight power supply and instability of energy prices after the Great East Japan Earthquake, there is a renewed sense of the importance of energy conservation in the household sector. The energy forecast for long-term energy supply and demand (energy mix) formulated in July 2015 indicates energy efficiency improvements to the same level as after oil crisis in the 1970s (around 35%). This level is unlikely to be achieved without improving the energy conservation of houses themselves.

On the other hand, thanks to a policy established to promote the introduction of solar power generation, it has increased by an average of approximately 64 MW a month since 2013 and is forecast to reach approximately 140 GW by 2030. The result of this may cause that the generated power has exceeded demand from business offices and homes is flowing into the power distribution system and as this has caused a rise in voltage in the power distribution system, it has the potential to interrupt the high quality and stable provision of power. In order to prevent this, in addition to promoting technical development that would restrain the amount of power generated by solar power generation, there are calls for promoting the deployment of equipment that can store energy, such as electric vehicles, storage batteries and heat pump water heaters, thus “creating electricity”, “storing electricity” and “efficiently using electricity”.


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