Here's the thing...
I'm planning on placing the inverter, batteries and panels in the vicinity of the old house - it's got a nicely sized and perfectly angled/oriented (for solar) roof, also a better sized and protected from the elements area to place the solar equipment.
And that's the only reason for my initial plans on keeping the older overhead line, even though it's indeed clearly inferior to the newer, high quality underground cable.
Or the location of the solar hardware is not really a problem?
If chosen to keep and use the new house/underground line...
At the moment I don't quite understand how I could go about a grid connection design (for emergencies) if using the underground link to the meter since it is located away from the proposed location of solar hardware.
Would I need in that case run two additional lines instead of one, linking the new house to the inverter placed at the old house?
As in one line for a "normal" state of connection to the inverter, and then the second line just for the emergency connection to the grid?
Or is it going to be an ATS automatic transfer switch positioned at the new house that will be handling that situation via a single line? Again all other solar hardware is planned to be kept at the old house location.
As you can tell, I'm still quite lost,.
And yes, I'll definitely let a "Pro" handle the actual design and implementation.
Over here, I'm just trying to wrap my averse to all things electrical mind around the basic concept.
Thank you!!