I worked in wind turbines
to pay for university. Until I fell from 36ft height onto a steel floor.
The climb down from the turbine should have been (relatively) secure since I followed regs and used protection equipment. But the anchorage in the wind turbine tower was installed incorrectly and bent open when my hands slipped on the oily ladder on a cold December morning.
In Germany you can't sue your employer for negligence, since there is a "Gesetzliche Unfallversicherung" that insures him against all your claims, unless he tried to injure/kill you on purpose. In return, the "Gesetzliche Unfallversicherung" is supposed to pay for an equivalent education if you can't do your job anymore and compensate you for permanent consequences of work accidents.
In my case, that means no help in getting an education (since I was still a student at the time of the accident) and 400€/month for not being able to walk without a crutch, two smashed elbows, some nerve damage to the arms and higher back pain when my back is upright. The courts still have to decide on that, though.
Nothing for about 20 month of hospitals.
At least I can type, and luckily my parents pay for food and room while I finish university.
I recommend against believing you will be cared for if anything happens to you while working in Germany. I don't know about other countries.