: No mechanical system is 100% efficient; energy is always lost to friction, air resistance, and electrical resistance [4].
This converts DC battery power (12V, 24V, or 48V) into 120V/240V AC household power. generator free energy
Once your initial investment of, say, $3,000 for a solar/battery system is paid off (compared to $100/month in grid electricity), you have achieved effective free energy for the remaining lifecycle of the system. : No mechanical system is 100% efficient; energy
