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PV System, Battery, LP Gas Generator Combined to Cut Electricity Cost, Ensure Business Continuity

2019/11/07 19:49
Sousuke Kudou, technical writer
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Enetech Co Ltd (Komaki City, Aichi Prefecture) announced Nov 5, 2019, that it will commercialize a power generation system combining solar power generation (PV), storage battery and LP (liquefied petroleum) gas power generation facilities.

The system can supply electricity for more than several weeks if there are appropriate conditions such as weather and supply system of fuel, making it possible to deal with a long-term power failure.

Enetech will sell the system as "EGGS (Energy Generation from Gas and Solar)." In normal times, the system uses electricity generated with the PV facilities, stores surplus electricity in the storage battery and uses the stored electricity after sunset. When there is a shortage, electricity is purchased from a power company.

When the amount of electricity supplied from the PV and storage battery facilities is not enough in case of power outage, power is also supplied from the LP gas power generation facilities.

The output of LP gas power generation facilities can be several to several hundred kVA depending on budget and necessary amount of power. Compared with a storage battery with the same output, the cost for introducing them is about 1/10. By controlling the facilities in combination with other power sources, Enetech solved problems such as the time it takes to start up the facilities and long-time, continuous operation. They can also be used for peak shaving of power demand.

For example, if a system that cuts electricity cost by operating the PV, storage battery and LP gas power generation facilities in parallel and supplies 140kW of power for long hours in case of power outage is proposed to a customer whose contract demand is 250kW, the introduction cost will be about ¥40 million (with a subsidy) and the investment is expected to be recouped in less than 10 years.

Enetech will promote the system to companies that formulate BCPs (business continuity plans) or can risk human life in case of power outage such as medical and nursing facilities. There are some projects in progress, and the first system is scheduled to start operation within fiscal 2019.