Posted: Sun Apr 1, 2018 5:09am
I suggest that once you've got a smart meter, you don't immediately change contracts.
First register with Iberdrola Distribution so you can access your usage hour by hour and do this over a number of days. That should allow you to establish which 8 hours you want to choose to be at the cheaper rate.
Then do some number crunching - which should be fun.
Looking
at today's prices:
Plan
Noche is 0,069775 €/kWh low, and 0,148533 €/kWh high,
Plan
Elige 8 Horas is 0,074613 €/kWh low, and 0,168531 €/kWh high.
As you can see, the 8 hour plan rates are higher than Plan Noche.
Plan Noche gives you 14 hours at the cheap rate, currently 11.00 pm through to 1.00 pm, and in winter from 10.00 pm through to noon.
I've not looked at the 8 hour plan details recently, but when I last did, you could choose either a consecutive 8 hours, or two blocks of 4 hours. However, this may have changed to give you more flexibility.
My tentative conclusion:
Eight hours of your choice at cheap rate may well be offset by the other sixteen hours being at a high rate, and Plan Noche may well work out to be the cheaper option.
Take care not to wear out your calculator!