PLoL not in line with missing energy or E_Load - Stand alone project

[smsas]

Good day,

I'm having a hard time understanding the probability of "loss of load". 

I have a PV+battery stand alone project. I've seen that even when the loads>generation, the PLol is 0%. 

However, if I table the missing energy, there is some. How can I connect the missing energy to a loss of load event?

Thanks.