ovonics energy conversion devices ovonic hydrogen-economy system solutions solar panel manufacturing thin-film photovoltaics pv united solar ovonic environmentally safe rugged solar shingles roofing bipv uni-solar power shingles alternative nickel metal hydride batteries nimh-battery solid hydrogen storage hydrogen refueling hydrogen infrastructure nickel metal hydride regenerative fuel cells electric vehicles ev hev evs hevs optical memory electronic-memory threshold switch ovonic quantum control devices cognitive computer hydrides environmental non-polluting amorphous materials chevrontexaco oum dvd research development barrier production ovonyx intel stan ovshinsky oshinsky closed-loop hydrogen economy central analytical laboratory electron optical microscopy energy wavelength spectroscopy icp surface analysis uv-vis-ir x-ray diffraction ocean tomo 300 patent index iso certification iso accreditation ovon ener orfc stempel