(19)

(11)

EP 2 539 997 A1

(12)

(43) Date of publication: 02.01.2013 Bulletin 2013/01 (21) Application number: 11745007.2 (22) Date of filing: 22.02.2011

(51) International Patent Classification (IPC):  H02M 3/24(2006.01) (86) International application number: PCT/US2011/000318 (87) International publication number: WO 2011/102910 (25.08.2011 Gazette 2011/34)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 22.02.2010 US 338669 P (71) Applicant: Petra Solar Inc. South Plainfield, NJ 07080 (US)	(72) Inventors: JOSHI, Madhu South Plainfield, NJ 07080 (US) MODICK, Bruce South Plainfield, NJ 07080 (US) TRANSDAFIR, Titi South Plainfield, NJ 07080 (US) DECKER, Ron South Plainfield, NJ 07080 (US) KUTKUT, Nasser South Plainfield, NJ 07080 (US) (74) Representative: Ström & Gulliksson AB  Box 4188 203 13 Malmö 203 13 Malmö (SE)