What is the rated Voc for each panel?
You can get the tracer 40a mppt for around $200 or so altho we still haven't seen any one actually successfully using that series of controllers yet.
Temp sensing at the battery is important if you deal with excessive heat or cold. Some controllers like the Eco-worthy have the sensor inside of it so as long as it is in the same conditions as the batteries, the affect is the same. Most low end controllers have no sensor at all.
There are advantages to both mounted and unmounted panels. Those with mounted tend to over emphasize the time and effort it takes to set them up (10 min) and turn them (5 seconds) and then discount the extra amps to be had early and late when mounted panels are barely putting anything out. In other words my single portable is worth both of yours mounted.
