Indeed. Even solar.
Energy is neither created nor destroyed.
Solar PV arrays convert solar radiation into electrical energy, but this process is not 100% efficient. Some energy is lost as heat during the conversion process.
Entropy.
In the context of solar PV arrays, this means that while they convert solar energy into electrical energy, they also increase the entropy of the system. The overall process is not perfectly reversible, and there are always losses associated with it.
Energy Payback Time.
The manufacturing, installation, and maintenance of solar PV arrays require energy inputs. The energy payback time is the time it takes for the solar PV system to generate the amount of energy that was used to produce it. This means that the system does not provide "free" energy immediately; it takes time to recover the initial energy investments.