Feature Article 2
Home Energy Management System to
Support Efficient Energy Use through AI-based Control
Year by year, more solar power generating systems have been installed in Japan, and sunlight has now gained ground as one of the most important power sources in Japan.
CO2 reduction is a shared goal around the entire world now that the Paris Agreement, an international accord that deals with measures against global warming in and after 2020, was ratified. RE100, a global initiative uniting businesses committed to 100% renewable electricity, was set up as a sign of global society’s growing demands and needs for renewable energy.
However, when it comes to a system of purchasing generated power at a higher price, which is generally called a feed-in tariff (FIT) system, the power purchase unit price is annually decreasing with a reduction in system prices in Spain, Italy, and Japan in addition to Germany, a leading country in terms of installation of solar power generating systems. Conversely, the renewable energy charge, which is distributed as the purchase cost, is increasing. Thus, financial burdens on the general public are increasing.
As the system is nearing the end of validity, it seems that we are going into a new phase in terms of the use value or method of renewable energy.
Kyocera’s Home Energy Management System (HEMS)
It is expected that in the future more and more houses will be equipped with solar power generating systems designed to allow consumption within the house for efficient use of energy. As a specific example, electric power generated by solar power generating systems installed on the roof can be stored in a battery storage system or used to produce hot water with EcoCute units. Equipped with artificial intelligence (AI)*, Kyocera’s HEMS NAVIfitz estimates solar power generation output and power consumption based on weather forecasts and power consumption patterns and automatically controls the battery storage system, EcoCute or other equipment depending on the situation to ultimately make effective use of power in order to contribute to the user’s ecological lifestyle.
* AI capability will be available when the system is updated in August 2017 (planned).
Development of Corresponding Battery Storage Systems
A lithium-ion battery storage system with a 6.5kWh capacity and multi DC link was commercialized as a battery storage system corresponding to the AI control of HEMS NAVIfitz.
The name of this product, Multi DC Link, is given because it is capable of efficiently connecting the power from a solar power generating system to the battery storage system in DC for power charging. This means that a system in which power from Kyocera’s solar power generating system featuring high reliability for many years is controlled by the HEMS NAVIfitz and is directly charged to or discharged from the battery storage system of the Multi DC Link.
Comment from Marketing Staff
The new HEMS NAVIfitz predicts the solar power generation for the following day and the necessary power consumption based on weather forecast data and the accumulated customer lifestyle data and automatically controls the equipment.
With this system, the user can charge surplus power, made available from solar power generation, in a battery storage unit or use it with EcoCute or discharge power from the battery in time of the day when the unit price of purchased utility power is high, ultimately allowing the user to lower their power bill or reduce power consumption. We hope that we can help homes reduce their power consumption and realize a new energy society by maximum use of this AI capability.