Free energy. It is possible?

 “Free energy” refers to the idea of a system that can generate power by taking energy from a limitless source.

As far as we know :

The total amount of energy in a closed system is fixed, free energy IS NOT POSSIBLE. The total amount of energy in the universe cannot increase or decrease. Energy is conserved https://en.wikipedia.org/wiki/Conservation_of_energy. Free energy implies a system which generates more energy than the input energy. According to second law of thermodynamics, there is no machine whose efficiency is 100%. Entropy of a system increases while doing an irreversible process.
CONCLUSIONS : infinite amount of energy (FREE ENERGY ) is impossible. But, a large source of energy is possible.
LARGE SOURCE OF ENERGY