PPB Industries Pittsburg, Pennsylvania Solar Energy Company Solar Power Corporation Produces solar energy collector cells for heating and hot water. Financed by Exxon. For orders for 1,000 units or more, they will sell 5-cell modules with output of 1-1/2 peak watts at $30 each. The company has sold arrays for navigation lights, offshore gas production platforms, radio message repeater stations in Yellowstone National Park and railroad signaling devices. |