* U.S. solar start-up partners with unit of GS Yuasa
* To build solar powered energy storage system
* Seek to resolve storage challenge facing solar industry
(Adds details on partnership, Suniva's capacity expansion,
chief marketing officer's comments, byline)
By Laura Isensee
LOS ANGELES, Jan 28 U.S. solar start-up Suniva
Inc said on Thursday it would partner with the U.S. unit of
Japanese battery company GS Yuasa Corp (6674.T) to develop
solar-powered energy storage systems.
Financial details of the agreement were not disclosed.
Under the deal, Suniva and GS Battery Inc would build
renewable energy systems integrating solar power panels and
battery storage at various sites in the United States.
The move seeks to solve a challenge faced by the emerging
renewable energy sector: how to store electricity generated by
wind and solar so that the clean power is available and
reliable when the wind is not blowing or sun is not shining.
"One thing that will make solar for many applications much
more reliable and available is having that storage capacity,"
said Suniva's Chief Marketing Officer Bryan Ashley.
Ashley added that the solar panels could prove to charge
batteries faster and better than the electrical grid. Instead
of the alternating current from the grid, solar panels provide
a direct electrical current straight to a battery, so that
there is no loss of power in the change of currents, he said.
Norcross, Georgia-based Suniva makes high-efficiency solar
cells and modules, competing with modules made by U.S.-based
SunPower Corp SPWRA.O and Japan's Sanyo Electric Co Ltd
6764.T, or Suntech Power Holdings Co Ltd's STP.N
high-efficiency Pluto panels. Its customers include Germany's
Solon SE SOOG.DE and India's Titan Energy Systems Ltd.
Last year, the company raised $75 million in a financing
round led by private equity firm Warburg Pincus LLC [WP.UL] to
expand its manufacturing capacity to 100 megawatts.
In the spring, the company will increase that capacity to
175 MW and it plans to open a second plant in 2011 with an
annual capacity of 400 MW to 500 MW, Ashley said.
For that second plant, the company expects to hire about 20
people, adding to its workforce of over 150 people; it is
waiting for a loan guarantee from the U.S. Department of Energy
to help fund the expected $250 million investment.
For the first project with GS Battery, Suniva would build a
30 kilowatt solar array at the battery company's headquarters
in Roswell, Georgia. The system would have 3,000 amp hours of
storage and use nano-carbon, lead-acid batteries.
The company said the projects would focus on commercial and
industrial markets and potentially the residential market. The
size of the projects would range from as large as 30 kilowatts
to as small as 3 kilowatts.
(Reporting by Laura Isensee, editing by Leslie Gevirtz and
Gerald E. McCormick)