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Self-consumption of Solar Power, O&M Featured at Trade Show

Xsol optimizes control of PV system/battery, TMEIC sets up new call center

2019/09/28 09:53
Kenji Kaneko, Nikkei BP Intelligence Group, CleanTech Labo
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"Control System Integrated With PV System" exhibited by Xsol (source: Nikkei BP)
TMEIC set up a new call center. (source: Nikkei BP)
Kitamura Manufacturing developed a panel cleaning system that reuses water. (source: Nikkei BP)

World Smart Energy Week, the largest-scale energy-related trade show in western Japan, took place at Intex Osaka (Suminoe-ku, Osaka City) from Sept 25 to 27, 2019, and 520 companies (including more than 100 solar power generation-related companies) participated in the show.

In addition to the components of solar power generation (PV) systems such as solar panels, PV inverters and mounting systems, many companies exhibited (1) systems for self-consumption such as storage batteries and power source control devices and (2) products related to O&M (operation and maintenance) services including remote monitoring systems, panel cleaning systems and inspection devices.

For self-consumption-type PV systems, Xsol Co Ltd (Kyoto City), Yamabishi Corp (Ota-ku, Tokyo), etc exhibited systems that can optimally control solar power generation and storage batteries. Also, Wave Energy Inc (Minato-ku, Tokyo), etc highlighted systems that maximize the amount of power consumed in house without using a storage battery. They are systems that do not transmit surplus solar electricity to a power grid and have functions to store surplus electricity and control output restriction.

For the trade show, Xsol commercialized "Control System Integrated With PV System" combining 15kW of solar panels and 15.36kWh of lithium-ion (Li-ion) batteries and exhibited it. Xsol reduced the cost of the system by eliminating a DC/DC converter. So, if electricity cost is reduced by making use of the peak-cut function, it is possible to recoup investment in about 10 years without a subsidiary in some cases.

As for O&M services, five or six years have passed since projects started at an early stage of the feed-in tariff (FIT) policy, and the number of O&M services that support periodic maintenance and can deal with aged deterioration is increasing.