Farming In The UK

I am watching Countryfile and glass house farmers are complaining they cant afford to grow in glass houses because of high energy costs . My question is why ? In this day and age there is no need to relly on the energy grid for their energy . Their is now solar power and all sorts of steam power etc . Yes the initial pay out may be steep but then surely in the long run it would more than pay for itself . Instead of selling land to the power companies to cover in solar panels , put their own solar panels or build other energy generators and sell the excess they dont use back to the grid . That way its a win win . They then produce their own energy and sell the excess back to the grid which in the future once the initial cost has been met would be pure profit . They say we need to move with the times so why arnt we . We have wind , solar and alsorts of other ways to create energy including power from animal dung and rubbish and food waste . Why are we as a western first world country so far behind the times at a time when the government are pushing clean energy production . Why do we no longer have Made In Britain which used to mean money well spent and reliable products . Now everything comes from a third world country in Asia . Something has gone badly wrong .