Looking for a 40 amp MPPT solar charge controller

Salvo wrote:
That doesn't look too bad. Why are you going with such high voltage? Look at the efficiency plots. Better to do some parallel to reduce string voltage and increase efficiency.

Salvo, I was wondering about that, myself. It appears there's only about a 1% difference in efficiency, though? (3215bn graph)

I'm looking to go mppt next fall, for fall thru spring solar charging, with my two 12v/140w panels, and am wondering if I should go series or parallel?

Thanks!