I see you can limit Input current as well as output with new Classic Firmware.
With Grid Tie Inverters it's practice to oversize the array in relation to Ratings.
Can you limit the current to keep within the wire size / SCC Amp rating
and upsize the array a bit? Don't care if it clips a few minutes a day.
Where is NEC2011 on this? Used to have to de-rate
current output relative to Controller ratings in the PWM days,
Is this so with MPPT programmable charges that limit currents
and are rated for continuous opr.
Don't have access to 2011 NEC here.
Overcurrent protection is best done by the overcurrent protection devices that were designed for that purpose -- breakers and fuses. I would never, repeat NEVER, rely on the pwm regulation in a charge controller to make sure my wires and CC, or worse, house don't burn up. What if the CC breaks, or it has a software bug?
You should size every component in the system according to the ampacity and overcurrent protection requirements in the NEC.
Breakers are sized to protect wiring, not electronics. You can adjust the Classic to do many things, but make sure the breakers and wiring is adequate to protect. When a charge controller breaks, they typically short internally from battery plus to battery minus. This condition puts a direct short across the battery bank. You need a breaker that will trip to keep the wires from burning up. By the way, all controllers work this way.