All - Thanks to all for the responses. For now, I'll forgo an extra display and just monitor the setup via the voltage meter.
Almot wrote:
...Tell them to keep Z-mounts, those are useless for RV installations... .
OK, what do I look for in mounts for a fiberglass RV roof?
Almot wrote:
...Morningstar is a reputable brand, but from looking at brief description I can't see what is the bulk voltage and whether it is a 3-stage and if so what are the setpoints...
I found the datasheet on the Morningstar support page. It says "Charging stages: Bulk, absorption, float, equalize" Sounds like a Bulk, plus 3 stage controller.
"Regulation Voltage" is listed at 14.4v for flooded cell batteries, I'm guessing this is bulk voltage.
I suppose all I care about is" 1) is bulk high enough to fully charge the batteries, and 2) does the float stage kicks in properly and prevent overcharging when it sits in storage in the summer sun.
http://www.morningstarcorp.com/en/support/library/SunSaverENG_R3_5_12web1.pdf