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For a DC Optimized grid-tie system (e.g. SolarEdge) is it correct to assume that each Optimizer isolates the individual panels from the current and voltage of the string? That is to say, given that the Optimizer is an MPPT, does each panel see only it's own PV created voltage and current? If this is true, this would seem to entirely prevent PID (which is rare these days -- or at least not often discussed for residential systems) and would also prevent / limit panel busbar scorching / accelerated corrosion from seeing high DC voltages and currents -- especially if some panels in the string are partially shaded. Thus, aside from the increased risk of optimizer failure, it would seem to suggest that the panels themselves would be under somewhat less electrical strain.
Of course the corollary is, "Does it matter?" "Is there any tangible benefit?"
Of course the corollary is, "Does it matter?" "Is there any tangible benefit?"
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