Design of 12kW solar panel system at 100m distance

[cajocars]

It’s a hybrid. I don’t know what operating modes it has for using a grid connection, IE whether it will properly control transfer relay to avoid parallel operation if you have no interconnect agreement. Are you allowed to interconnect in parallel with no agreement as long as you zero export?

I am not sure; you can connect up to 800W of ‘plug&play’ solar panels (microinverters with no export limit) by just informing the distribution network. There isn’t any legislation for pure off-grid as most systems are grid tie.
Off grid with ‘zero export’ seems to be a grey area where most people just do it without telling anyone.