(19)

(11)

EP 2 359 456 A2

(12)

(88) Date of publication A3: 29.07.2010 (43) Date of publication: 24.08.2011 Bulletin 2011/34 (21) Application number: 09830781.2 (22) Date of filing: 15.10.2009

(51) International Patent Classification (IPC):  H02J 13/00(2006.01) G06Q 50/00(2006.01) (86) International application number: PCT/US2009/060900 (87) International publication number: WO 2010/065197 (10.06.2010 Gazette 2010/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 04.12.2008 US 328703 04.12.2008 US 328714 (71) Applicant: American Power Conversion Corporation West Kingston, RI 02892 (US)	(72) Inventor: PAIK, Namwook Acton Massachusetts 01720 (US) (74) Representative: Hayden, Nicholas Mark  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)