Alan, are you sure?
The electricity bill suggests an average of 293 kWh/day were supplied, and on the slackest day in December, Penton reports 198kWh/day going into the shipping container.
The green line (FPL) dips below the red line (Penon) between the interval marked "Nov 2015" and "Dec 2015" ... so I guess I should have said "second half of Nov 2105". Penon's power for that period varies between 266 and 274, where FLP drops to 200.
But going back to July 2015, even if I set the input power to 400 kWh .. above FPL's maximum daily for the month, I still get a COP of over 50.