It is indeed a RFM69Pi @433 MHz. You would use it to receive data coming by radio on the ISM band from either emonTx’s or emonTH’s.
I think we’re missing the big picture. What is it that you’re trying to achieve, and what equipment do you have that you haven’t yet mentioned. Bear in mind all we know is what’s written in this thread, because there isn’t much of a hint in what you wrote last July, other than you had then a “PV system they key parts of which are the panels, an optimmersion controller and a wattson monitor.” and from the photo above, it looks as if the Wattson monitor is not in service.