These systems could be composed of any devices capable of converting energy from the environment, such as solar energy, thermal energy, or the energy of motion, to electrical energy.
(These systems; could be composed; of any devices capable of converting energy from the environment, such as solar energy, thermal energy, or the energy of motion, to electrical energy)
These systems
could be composed
of any devices capable of converting energy from the environment, such as solar energy, thermal energy, or the energy of motion, to electrical energy