We design our microgrids with flexibility in mind. For instance, Mi-Grid can be installed with either AC or DC power coupling. We can power you either way. Our systems can work with solar or wind power too.
AC VS. DC COUPLING MI-GRID
Mi-Grid AC vs. DC
Solar panels can be connected to Mi-Grid in two different ways. They can be DC coupled or AC coupled. Coupling is simply the term we use for the connection of the solar panels to the Mi- Grid system.
Mi-Grid—DC
DC coupling is the traditional way to connect solar panels to the Mi-Grid system. It is also the most efficient. Solar panels are DC (Direct Current), like a battery. It is easiest and most efficient to keep the power DC when storing to the batteries.
Mi-Grid—AC
AC coupling means the power is converted to Alternating Current, like your household power, before connecting to the Mi-Grid system. This means Mi-Grid can be retrofitted onto existing grid-tied solar systems. The advantage is a more simple installation of the solar array.
Which is better?
For Off-Grid systems, where efficiency is extremely important, DC coupling is definitely preferred. With most Grid-Tied applications, the efficiency loss only shows up when the utility is offline. And AC coupling allows a larger solar array to be connected to a smaller inverter battery system, maximizing savings, while reducing installed cost.
Retrofit systems connect the Mi-Grid system with AC coupling. With little change to a standard grid-tied system, you gain peace of mind with battery storage and generator backup. Mi-Grid keeps you going.
AC vs. DC cost
At the time of a new installation, similar AC and DC systems are nearly the same cost.
Where the budget is constrained, an AC coupled essential system is best. The system can be upgraded later if more inverter power is needed.
DC systems are best when off-grid. Efficient storage of the energy provides the most predictable power around the clock.
Looking to build a custom solar power? Great, get in touch with our engineers by submitting a form with your specifications and needs here.
Diagram of a Mi-Grid coupled with AC power.
