Grid-Tied AC microinverter
Posted: Fri Sep 23, 2016 11:09 am
These devices have a unique feature- they must first see 120 VAC, 60 Hz on their output, before they switch on and contribute power to that AC line.
The purpose is to disable the output of a solar module in the event the grid goes down. If the inverter did not shut down, it would be supplying AC to a "dead" grid, causing a nasty safety issue for those working on the "dead" line.
In order to defeat this shut-down device for an application, I need to generate the grid voltage separately, to fool the inverter into working as if it is feeding a grid.
Looking for ideas on a small cheap 120 VAC sine wave, 60 Hz generator from a 12 volt battery. Not sure how much power this oscillator need supply, perhaps half amp @ 120 VAC?
I have tried off the shelf plug in the cigarette lighter inverters, but their trashy 120 VAC output does not fool the microinverter into turning on. The micro is looking for clean grid quality AC.
Ideas?
The purpose is to disable the output of a solar module in the event the grid goes down. If the inverter did not shut down, it would be supplying AC to a "dead" grid, causing a nasty safety issue for those working on the "dead" line.
In order to defeat this shut-down device for an application, I need to generate the grid voltage separately, to fool the inverter into working as if it is feeding a grid.
Looking for ideas on a small cheap 120 VAC sine wave, 60 Hz generator from a 12 volt battery. Not sure how much power this oscillator need supply, perhaps half amp @ 120 VAC?
I have tried off the shelf plug in the cigarette lighter inverters, but their trashy 120 VAC output does not fool the microinverter into turning on. The micro is looking for clean grid quality AC.
Ideas?