All the big oil companies did a lot of photovoltaic research in the 70's. I think it might have been exxon who were one of the earliest players. I don't think i

All the big oil companies did a lot of photovoltaic research in the 70's. I think it might have been exxon who were one of the earliest players. I don't think it was sinister then, just a diversification into "energy" companies, especially with the oil crises going on back then.