The MNTRANSITION is made to transition from PV wire to standard wire and is good for 1000VDC. It works for 2 isolated outputs and up to 4 strings of PV. Includes 15 position GROUND BAR. When used on a system over 600 volts be sure to use 1Kv or higher rated wire both in and out. Standard THHN/THWN Wire is only rated to 600VDC.