They also charge for the installation.
However you make a big error in your post,,,,, you use the word sensible when talking about PLN. The two cant be used together.
Great spirits have often encountered violent opposition from weak minds. Albert Einstein
La motivation vient en se motivant ~ Motivation come by self-motivation
From what I was told, it's more for PLN to gauge how much power they need to produce. As with a lot of things I've noticed, it's a lazy way to get much needed data.
thanks for elaborating !
always interesting to discover how things work here, wether logical or illogical