There are no losses in generating from solar which is the topic of the article. There is no loss since there is no fuel. There is a loss in transmission but not enough to offset the roughly 4x reduction in energy use. As the other person also pointed out, there is the same loss in transmission for e.g. combustion engines. You don't pour the gasoline that came out of your back yard. It's extracted and processed for most of the world somewhere very far away and then transported. If anything, the losses in electricity are less than the energy required to transport these huge amounts of fossil fuels.