For the OPs use there is little difference between serial and parallel. With 40' of wire (one way?) there is less loss with serial.
I also went serial due to the better shade power due to bypass diodes, but that is not a OP concern.
OP Your panels provide 560W/14.8V (bulk charging) = 37.8A minus wiring and controller losses. As others point out usually less due to panel orientation and less than clear air, perhaps 20 percent less. Also as you found out panels produce more power when cooler and conversely less when warmer. Some controllers like apparently yours tolerate over paneling. You don't get any additional maximum amps but rather the CC is not damaged. However over paneling can provide more available power for the day.
