Question on Micro-Inverters

[jflorey2]

jflorey2 - I'm confused by your answer.

I would expect the sine wave phase is random for each inverter.

No, the sine wave is exactly the same for each inverter.

Each inverter is connected to an AC line. That AC line has an AC voltage on it. (If not the inverter will never start up.) The phase of that AC signal can be detected by the inverter, and is identical at all inverters on that circuit.

[npaizis]

jflorey2 - I'm confused by your answer.

I would expect the sine wave phase is random for each inverter. So it's 16.7 milliseconds from rising edge to rising edge. If we assume that inverter#1 is the reference, what happens if inverter#2s rising edge is 0.5 seconds later than #1s rising edge. They would cancel out and the voltage would be 0v. Obviously this doesn't happen so how do they align the phase angles so they all coincide at the same time and are all in the same phase?

[jflorey2]

I am curious how the micro-inverters align the phase angles when connecting multiple micro-inverters in parallel.
Anyone know?

They align to the phase of the voltage signal, which is present at each inverter.

[npaizis]

I am curious how the micro-inverters align the phase angles when connecting multiple micro-inverters in parallel.

Anyone know?