<snip>
> does give higher voltage a slight benefit, but 750 versus 600 is hardly
> enough to really matter.  It all just comes down to voltage * current

Perhaps it matters enough to reduce the number of rectifier taps into the grid.

Edison first wired commercial services in DC, with the drawback being a generating station was needed every quarter mile or so. Economy of scale led us to use polyphase AC to keep infrastructure costs in check.

How far apart are the transit taps into the grid? How much could a 20% increase in voltage increase the distance between taps?

> in the end.  Incraease voltage and you decrease current and get the
> same result.  Maybe the invertor is more efficient with some input
> voltages than others, but again, it isn't a big voltage difference so
> probably doesn't matter much.
>
> --
> Len Sorensen