Brian,
We have the Renogy 100W suitcase also and on our 1st. two week trip in Arizona we found it to work fantastic on keeping our two 12v batteries charged. Did not need to use the Honda 2000i generator during the two week adventure. Knowing this I would have purchased it sooner.
I'm sure you will be very satisfied with the unit.
M & N
Tundra TRD V8 4x4 w/Leer Shell
EU2000i * Prodigy * McKesh * Trek * Renogy * ENU