Untethered to the grid or to batteries, PV modules can still do useful work around your home, farm, or ranch.
PV systems that power loads directly from a PV module or array are called “PV-direct,” and operate only when the sun is shining. These systems are much less expensive and easier to install than battery-based or grid-tied designs. They do not require batteries, charge controllers, or inverters, all of which are expensive and reduce overall system efficiency.