蓄電池の入札に60倍以上の応募、州政府の設置義務で市場拡大へ

Published at Nikkei Technology Online --- 　2014年12月に、カリフォルニア州で最大規模の電力会社である米Pacific Gas &Electric（PG&E）社が、78MWの蓄電池の競争入札を開始した。2015年2月末の締め切りまでに、なんと募集の約64倍に相当する5000MW以上の応募があったという。

　PG&E社を含むカリフォルニア州の大手電力会社3社は合計で、2015年中に200MWの蓄電池を落札する予定である。3社による入札は、今後も2016年と2018年、2020年に予定されている。米国でエネルギー貯蔵用の蓄電池の市場が急速に拡大しそうだ。

州政府が蓄電池の設置を義務付け

　カリフォルニア州は、2020年までに再生可能エネルギーによる電力販売比率を33％にする目標を設定している。同州の電力会社は、この目標を予定よりも早く達成できる勢いで太陽光発電などの再生可能エネルギーの導入を進めている。

　しかし、再生可能エネルギーの大規模導入に伴って生じる、電圧変動などの電力系統への悪影響が顕著になってきたため、同州は民間電力会社 3 社（米Southern California Edison（SCE）社、PG&E社、米San Diego Gas & Electric（SDG&E）社）に、2020 年までに合計1325MWのエネルギー貯蔵用蓄電池の設置を義務付けた。州政府が電力会社に対して、蓄電池の設置を義務付ける法律を制定したのは、これが米国で最初の例となった。See More Here

ソーラーフレンドリーな電力会社はどこか

Published at Nikkei Technology Online --- 　米国の多くの電力会社が加盟しているSEPA（Solar Electric Power Association：米国太陽発電電力協会)は、電力会社別の太陽光発電導入量ランキングを毎年4月に発表している。例えば、1年間の導入量や、電気需要者1人当たりの平均導入量、系統連系接続件数などのデータである。

　SEPAによると、2014年度に米国では18万20000件の新しい太陽光発電システムが設置され、その合計導入量は5.3GW（交流換算）に上るという。導入量が多い電力会社がある州は、カリフォルニア(CA)、ハワイ(HI)、アリゾナ(AZ)、ニュージャージー(NJ)、そしてノースカロライナ(NC)だった。

　米国では、3000以上の電力事業者が、年間で約3兆7237億kWhの電気を、約1億3000万件の家庭と1850万件の商業・産業用の顧客に提供している。米国エネルギー省（DOE）のエネルギー情報課のデータによると、2014年の総電気販売金額は38億9000万米ドルであった。See More Here

Panasonic Ramps Up Japanese Solar Manufacturing to Meet Domestic Rooftop Demand

Published at Renewable Energy World --- Panasonic Corp, a Japanese electronics company, announced that it will expand its domestic solar cell and module production to meet the rooftop solar demand in Japan. The company will invest a total of 9.5 billion yen (US$78 million) in a cell production plant in Shimane Prefecture and a module plant in Shiga Prefecture.

The company’s current HIT production capacity is 900 MW per year, of which 300 MW is produced in Malaysia and 600 MW in Japan. The new investment will boost the domestic production capacity 150 MW to total 750 MW by March 2016, making its total annual production capacity more than 1 GW.

Panasonic’s solar cells, known as HIT, are hetero-junction cells composed of monocrystalline and amorphous silicon. Panasonic reached a conversion efficiency of 25.6 percent last year at the research level, and 22.5 percent at the mass production level.  Since high-efficiency cells enable more power per square foot than conventional solar cells, they provide a greater advantage to the majority of Japanese homes and offices, which have very limited roof-space.

The company will allocate the boosted domestic production capacity solely to the domestic market, specifically residential and rooftop systems below 500 kW while allocating modules produced in Malaysia to overseas markets.

Furthermore, as the domestic production ramps up, the company will phase out outsourced modules. The company has outsourced multicrystalline solar modules under an original equipment manufacturer (OEM) contract from Europe in order to meet demand for a large quantity of relatively inexpensive modules used for Mega Solar projects. In the fiscal year 2014, ending in March 2015, the outsourced solar modules represented approximately 18 percent of the company’s entire solar module sales, but the increased domestic production capacity will eventually replace all the outsourced modules... Read More Here

Born from Disaster: Japan Establishes First Microgrid Community

Published at Renewable Energy World --- Following the 2011 earthquake, tsunami and nuclear disaster in Japan, one city decided to transition to a clean, renewable future and became Japan's first microgrid community.

Although Japan's Fukushima prefecture is most commonly associated with the 2011 disaster due to the nuclear power melt-down, Miyazaki prefecture, located north of Fukushima, suffered the largest death toll, close to 10,000, and the largest flood damage in the nation.

Located on the coast, Higashimatsushima city was no exception. It had a catastrophic tsunami-caused flood, which put 65 percent of the city under water, with over 1,100 lives lost. Approximately 10,000 residents lost their homes and were forced to evacuate.

“After the disaster, some parts of the town didn’t get electricity for up to three months,” said Tohoru Ishigaki at the office of Future City Initiative under the city’s Department of Disaster Recovery Policy. “We strongly felt [after the disaster] that our responsibility was to provide reliable energy.”
Turn Local Tragedy Into a New and Vibrant Vision

To create a safe, resilient and sustainable society for the remaining population of 40,000, the city decided to deploy distributed, clean renewable energy sources. Under post-disaster recovery and reconstruction plans, the city set a bold goal to become a Net Zero Energy City by 2022, supplying the entire city with locally produced energy.

As a first step, the city turned a flood-affected former city park into a 2-MW solar photovoltaic (PV) project. This project symbolizes the city’s commitment to energy self-sufficiency. Mitsui & Co., Ltd, one of the largest trading company in Japan, completed this system in the summer 2013. The company also built PV carport systems with a total capacity of 270 kW at three locations on high ground, away from the vulnerable coastline. These sites are designated for evacuations and solar power will provide emergency power....Read More Here