DIC Introduces Self-consumption-type PV Systems at 5 Offices
Mitsubishi Electric provides one-stop service
Mitsubishi Electric Corp announced March 26, 2019, that it has delivered about 1.5MW of solar power generation (PV) facilities for self-consumption to five offices of DIC Corp.
Mitsubishi Electric provided a one-stop service including planning, engineering and construction and is also responsible for operation and maintenance.
With Mitsubishi Electric's solar panels and its own "Smart-Rico" energy management system, it increased installable capacity by controlling the output of PV inverter in accordance with the amount of power consumption and preventing reverse power flow. As a result, the total amount of self-consumed power was maximized.
The PV facilities were introduced at DIC's Chiba Plant (Ichihara City, Chiba Prefecture), Yokkaichi Plant (Yokkaichi City, Mie Prefecture), Saitama Plant (Ina-machi, Saitama Prefecture), Tatebayashi Plant (Tatebayashi City, Gunma Prefecture) and Central Research Laboratories (Sakura City, Chiba Prefecture). Solar panels and installation methods were arranged in accordance with the scale of installation site and installation environment (e.g. ground conditions), respectively, realizing the improvement of power generation efficiency and stable operation, Mitsubishi Electric said.
The solar panel employed for the plant is a 300W high-efficiency type whose efficiency was improved by using (1) the PERC (Passivated Emitter and Rear Cell) structure, which prevents the inactivation of electrons inside a cell, and (2) the SE (Selective Emitter) structure, which reduces resistance loss in a cell.
The scale of the PV system installed at the Tatebayashi Plant is larger than the scales of the PV systems installed at the other four plants. On idled land, 1.2726MW of solar panels were set up. The PV inverter is Toshiba Mitsubishi-Electric Industrial Systems Corp (TMEIC)'s product with a rated output of 1.25MW. Special specifications suited for the use conditions were adopted, according to Mitsubishi Electric. The system is expected to generate 1,308,704kWh per year.
At the Chiba Plant, 105.3kW of solar panels were installed on a folded-plate roof. The total rated output of PV inverters is 100kW. The system is expected to generate 103,961kWh of electricity per year.