Hi,
With regards to the Endesa letter I helped a friend of mine with it, with the translation and talking to Endesa etc.
He decided to rent the ICP from Endesa for 0.6 cents a month, but for this he had to install a box, with an electrician. He paid around 80 euros for the BOX, it was an English electrician in Duquesa who did it (120 euros if they have to fit it on the wall) and now he is waiting for the Endesa people to come and install the ICP.
He sent the letter back, called them and now he is waiting.
I think is just an extra expense and trouble to have this ICP, but I hope my comment was helpful.
Cheers,
Valentina