Even with my panels being portable and tracking, each trip I find a way to set them flat to get a idea of how they will be once mounted. For summer use with decent weather, (our usual half days of sun), the 230w poly flat was more than enough for the trailer functions and even some inverter use in a more traditional manner of use the battery, charge the battery.
The 245w monos flat are late sleepers. The level of light needed to wake them up is more intense than the poly and they stay groggy until the sun is at a better angle to them. Tracking they were fine as they would kick out about 26a as soon as the sun was on them.
That's why Mr wizards panels do well for him is because they require the least amount of light to get them going. He may not be getting barn burner amounts of power but it is something. Our poly putting out 4a on a cold, cloudy weekend kept us off the generator until the sun came out a few days later. The monos would have never produced enough to wake up the controllers.