Oh heck yes, setup could be an issue for sure.I feel many solar installs, and collaboration between solar co, supplier, and retailer, can be sadly lacking. We have 3 phase, with 2 x 5kw inverters on 2 phases.Solar co's and electricity suppliers can really muck up metering / settings.For 10 months, ours was wired up single phase, then after correcting that, found the system software was also set for single phase.Not sure what it cost us for that time, but in winter our production was pretty carp, ...