"We are therefore on the threshold of it being more cost-effective for German industrial companies, which consume between 500 and 2000 MWh, to use PV energy they have generated themselves, than to obtain energy from the grid at a price of 0.125 euro/kWh."
Study, Levelized Cost of Electricity from Renewable Energies - Christoph Kost et al. - Fraunhofer - May 2012
Installed costs in Germany have fallen by 20% since the Fraunhofer report was published last year... i.e. Industrial companies have crossed the threshold of cost-effectiveness.