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Sekisui builds a house with 3 kinds of residential products with home energy storage technology

by:dcfpower     2021-03-11

With regard to the development of the Japanese household energy storage market and related technologies, it focused on the smart housing test of Japanese real estate company Sekisui House and the V2H (Vehicle to Home) technology being actively developed by Japan’s three major car companies. In 2011, Sekisui Jianfang launched a smart home product equipped with three types of batteries: fuel cell, solar cell and energy storage battery. This is the first in Japan. Among them, the fuel cell is a 700W or 750W household solid oxide fuel cell (SOFC), the solar cell is 3kW~6.4kW (mainly provided by Sharp), and the energy storage system (including power conversion device and HEMS) uses GS Yuasa. Lead-acid battery packs, Panasonic lithium battery pack packs and Leaf car battery packs. Based on a large number of empirical experimental data, Sekisui Building has reached some conclusions. For example, houses with three types of batteries can only be promoted by some consumers who are very concerned about safety in emergency situations (because of the 310 Ten thousand yen is obviously not worth the increased expenditure for the installation of these three types of batteries), if it is to be popularized, the price of the battery must be reduced to less than 30,000 yen/kWh. If, with the development of smart grids, Japan begins to implement dynamic pricing with a price change system in which electricity prices change drastically with demand,' electricity prices will increase when electricity is short, and the gap with normal electricity prices will increase, thus speeding up battery cost recovery. The company stated that the popularization condition of this kind of smart energy house is that the cost recovery time is half of the equipment life.

Green First HybridGreen First LiB

Green First V2H

Time to market 2011 08 August 08, 2012 October 01, 2012 October 01, 2012 Battery type Lead-acid battery

Car lithium-ion battery

Battery pack capacity 8.96kWh4.65kWh


Usual use method

You can use 4.4kWh among them, can automatically charge in the middle of the night, discharge during the day, and can use electricity at staggered peaks.

You can use 2.3kWh among them, and can automatically Charging in the middle of the night, discharging during the day, and peak-shifting power

It can automatically charge in the middle of the night and discharging during the day, and it can use the peak-shifting power, but it can only be used when the EV is stopped.

Automatically switch when the power is off. Switching

As long as the EV is present, it can be switched manually

Maximum output power during power failure

2.5~3kW, which can output 100V/200V voltage< /p>

2kW, can only output 100V voltage

6kW, can output 100V/200V


Linked with fuel cell during power failure


Can or not

Linkage of solar battery and energy storage battery

Don’t charge with emergency socket, you can use all remaining power

Don’t charge with emergency socket , You can use all the remaining power

Cannot charge

In emergency (power outage, gas outage, etc.)

Use solar battery power to charge, and can use solar battery power continuously in sunny days Charging, can be used continuously in sunny days

The maximum is 24kWh and can be used up completely

Whether to support HEMS Yes Yes Yes Battery supplier GS Yuasa Panasonic

Nichicon (AESC)

Energy storage system price 2 million yen (including power regulator and HEMS)

1.7 million yen (including power regulator and HEMS)

Import of stationary lithium-ion batteries

57 Ten thousand yen (only for equipment and installation costs)

Corresponding allowances

HEMS introduction business

Promotion of countermeasure business subsidies and HEMS introduction business

Clean Energy vehicles and other guides Entry countermeasure fee subsidy

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