OK taking everyone's comments to heart, I'm dropping the suitcase panel (which did get to 13.5 V today) and going to 4X100W. I'm going to use some aluminum low profile unistrut to install the panels since that seems to be popular and I have some on hand. How are you people attaching those, short lag screws?
But this is what I ordered:
Renology 100 W panel monocrystalline
Victron SmartSolar MPPT 100/30 Solar
RENOGY 5 Pair MC4
MC4 Y Branch Connectors pk/2 X2
100amp Circuit Breaker X3
8 AWG 15ft red/black w/mc4
bayite DC 6.5-100V 0-100A LCD Display Monitor