Off-grid Solar Power System Introduced to Parking Area

2013/11/19 15:07
Kenji Kaneko, Nikkei BP CleanTech Institute

The government of Saitama Prefecture and Mitsui Fudosan Realty Co Ltd (Chiyoda Ward, Tokyo) opened an environmentally-conscious parking area on a site that was previously occupied by Saitama Prefecture Roudou Kaikan (Labors' Center) Nov 19, 2013.

The parking area, "Mitsui no Repark," is located near the Museum of Modern Art, Saitama. In the area, the "hybrid solar system," charger for electric vehicles (EVs) and signage and lighting devices that use LEDs were installed.

The hybrid solar system is not connected to a power grid of a power company (off-grid solar power generation system). It generates electricity with eight solar panels during daylight hours and charges a rechargeable battery. After sunset, the stored electricity is used to turn on the LED-based signage and lighting devices.

The solar panels generate about 1,839kWh of electricity per year. And the employment of the LED-based lighting devices is expected to save about 5,155kWh of electricity per year.

The prefectural government organized a public competition to design plans for the site. And Mitsui Fudosan Realty proposed the hybrid solar system, panels that block exhaust gas, the installation of an EV charger (200V) and other environmentally-conscious features for a parking area. As a result, the company was selected as a private parking lot operator.

In addition to the solar power generation system, the government praised other proposals that Mitsui Fudosan Realty made in consideration of both users and the neighborhood such as the installation of the panels that block exhaust gas between parking slots and adjacent pathways and the EV charger that can be used for 24 hours a day.