Looking at the data sheet, I see that the Blue Solar (w/o BT) has a Max Amp of 20A, but it's Isc Cut-off is 15A. On the other hand the Smart Solar (w/ BT) has a Max Amp of 15A, and a Isc Cut-off of 15A. Can the Blue Solar cut-off be reprogramed to say 19.5A, just below its 20A Max