Yes, if your generator controller measures the fuel level, then we can extract that data from the controller. If the controller does not measure the fuel level, then you may add a fuel gauge to measure any fuel tank remotely.

Yes, we can monitor whatever data can be obtained from the controller. Most older controllers provide basic alarm data.

Yes, if the controller does not provide this ability as a part of the controller, then the remote start/stop can be hard-wired.