DC vs AC – Off Grid Systems

Different applications call for different sized systems.

At Texas Off Grid, we specialize in customized off grid solar systems. Our systems can vary in production size, capacity, voltage, power demand, and design. The two systems we install are DC and AC Coupled. Coupled is the term used to describe how the solar is interconnected to the electrical system.

AC Coupled off grid systems – The new kid on the block

In the past decade, demand for grid tied solar has taken inverter and solar module efficiencies to unbelievable levels. The innovative technology in grid tied systems has now been utilized to cooperate in Off Grid Solar Systems. In AC coupled systems, the solar modules send DC electricity to a Grid Tied Inverter. The Grid tied inverter then sends the AC electricity to the Off Grid Inverter. The Off Grid Inverter directs electricity to loads as required and uses excess electricity to maintain the charge of the battery bank.

AC Coupled systems are best suited for larger systems with many AC electrical loads.

DC Coupled off grid systems – Grandpa is still live and kickin’

DC coupled systems have been utilized since the beginning of off grid solar. In a typical Dc Coupled System, the solar modules produce a DC electricity that is sent to a DC Charge Controller. The DC Charge Controller monitors the capacity of the battery bank and charges the batteries using elecgtricity from the solar modules. Advanced DC Coupled Systems maximize efficiency by directing the DC electricity to both the batteries and the Inverter that feeds the loads.

DC Coupled systems are best suited for smaller loads that have few AC loads or only DC loads.