Conshohocken, Pa. -- Ikea plans to install solar energy panels on two East Coast stores: Paramus, N.J., and Stoughton, Mass. Pending governmental permits, the rooftop installation will begin in the new year, with completion expected in spring 2011. The Paramus installation will have 4,600 panels generating 1,354,000 kWh/year, while the Stoughton site will have 2,800 panels generating 725,000 kWh/year.