Solar panels in parlell vs series.

[48V_GE11_Motor]

For a system that is around 5000.00 watts What would be the advantage of connecting the solar panels in paralell for Lower Array voltage vs series where the solar array voltage can get quite high. If I kept the Solar Panel system voltage around 48 Volts but the current around 120 amps. Is this OK? What is normally done in this case and why?

[Naptown]

high voltage low amperage will reduce line losses, reduce wire size reduce the need for combiners and fuses.
All around a better solution.

[Sunking]

For the same reason electric companies use high voltage.

[Mike90250]

For a system that is around 5000.00 watts What would be the advantage of connecting the solar panels in paralell for Lower Array voltage vs series where the solar array voltage can get quite high. If I kept the Solar Panel system voltage around 48 Volts but the current around 120 amps. Is this OK? What is normally done in this case and why?

No advantage, unless you want to make your wire supplier rich.

[StevesWeb]

Consider the gauge wire required for 120 amps, now raise it so you don't have a house fire, then price out that wire and the breakers required would cost.

When inverters fail I'd expect it to be because of the current being drawn, PN junctions get warmer as they handle more power, much more so than wire.

Higher voltage makes much more sense IMHO.

[Zeke]

As high a voltage as possible

So the theory is to setup your panel array to produce the highest voltage as permitted by the charge controller. The result being efficiency and cable cost saving.