Comment Re:Learn how to read before commenting (Score 1) 58
This faulty reasoning is exactly why it is dangerous. If you have a 15A fuse, wiring is rated for a bit less than that as permanent load. If you have a PV feed of 5A in the circuit, consumers can pull at least ~17A without triggering the fuse. That's enough to start damaging the wires over an hour or two.
For the sake of argument presume this happens. There is a PV on a circuit that is already overloaded with sum of multiple loads across different outlets reaching 17A. 15A circuits in the US are generally fed by 14 AWG romex. The difference between 15 and 17 amps with this gauge wiring is dissipation of an extra watt per meter. This is not going to damage jack diddly squat.
In the real world if a circuit was overloaded in this way then it is going to trip after a couple of minutes unless it is only overloaded when sun is shining on the panels.
Not all anti-island detection implementation are the same. Some can detect parallel inverter, others can't.
Chances are high that the cheaper the micro inverter (and therefore the home PV), the less likely it is to
Can you name even one such "cheaper" micro inverter that does this?
actually be able to detect this case. Especially when mixing different models, things become out of spec very fast and anti-island detection is essentially the feature that keeps the upstream RCD working.
Multiple micro-inverters are commonplace. You are effectively asserting without evidence the technology does not work. This is what that type of failure you describe would mean.
Lets for the sake of argument assume what you are saying is the case. The solution is requiring home depot to sell listed solar kits that meet applicable standards (e.g. UL 1741 et el). In the US this may be necessary anyway due to state specific curtailment logic.
Millions of people all around the world are doing this sort of install and half of the states in the US have legislation in the works to allow it too. There is nothing remotely "surprisingly dangerous" about plugging panels into wall outlets.