The electrolyzer should produce enough hydrogen for backup power in the absence of PV power. So, optimum number of electrolyzer unit consists of 19 units with rated 500kW for each one. The limited operational range of the electrolyzer is (20 -100% of rated power).
The flow rate of hydrogen gas through hydrogen compressor is equal to 105.32 Nm3/h (0.00262 kg/s).