Harry Bloomfield, Esq. wrote:
alan_m wrote :
That is why you can only make a price comparison with someone else if your
annual energy usage is near identical.

You cannot even do that, because the cost varies depending on where you
live, your postcode - for the same product, from the same supplier.

The tariffs are region based (on the old electricity boards). So you can
compare with someone in the same region. (My Symbio quote was Eastern, BTW)

A lot of tariffs are M pence per unit plus C pence standing charge. This is
a straight line: y = Mx + C
where C is the y-intercept (the price you'd pay if consuming nothing).

You can plot these lines on a graph and compare them. This will tell you
how sensitive you are to consumption - which tariffs are cheapest for which
usage, and how much your usage can vary before you fall onto a less-good
tariff. You might find, though, that the amount of difference between the
top tariff and another 'good' one is fairly marginal.

Theo