Im considering either dual 6000xp's or a single 18Kpv. Currently running a single LV6548. While I like the 18Kpv and its single form factor would fit better in my solar room, the reports of back feeding the grid even with zero export enables is a deal killer for me. However all the other features are very nice. That lead me to consider 2 6000xp's, however the appearent slow transfer time of 30m sec in parallel mode has me concerned. Anyone actually running these have any negative experience with the transfer time or anyone tested it to see what it actually is time wise?