I bought this inverter for cheap and I wanted to put in my RV, but it only lights the red alarm led, the previous owner indicated me that the inverter was part of a three phase system and I have to reset to default mode, can I do this without having to buy the USB interface?
You will meed the USB device for removing the existing configuration.
It is really useful to have that device anyway for making configuration changes in the future, so I think you will get to use it more than once.
Some people even pack these USB MK3 devices as part of their essential holiday luggage!
