I have a SmartSolar 100/20 and firmware V1.59. When the charger is equalizing my Lead acid batteries, the charge current seems to be: (Set Equalisation current) - (load current), even though there is enough input power, the current is not compensated. This leads to a less effective Equalisation cycle for my batterybank. The Equalisation current is set to 4A as advised by the battery manufacturer. I suspect this to be a software 'feature' that can solved quite easily. :-)