Tariff comparison graphs

runciblespoon

One thing the usual energy price comparison sites don't tell you is the tipping points between tariffs. If you tell the site that you use 10,000 KWh then the site may recommend Tariff A. But you don't know at what point Tariff A becomes the cheapest. Perhaps it's only between 10,000 and 10,200. Maybe you'd rather choose Tariff B which is slightly more expensive for 10,000 but gets much cheaper below 9,000. Without putting in lots of different numbers into the comparison sites it's very hard to tell this sort of thing.

Is there any site out there that constructs graphs of the prices? I knocked up a quick spreadsheet to compare some of the fixed price tariffs:


SPF=Scottish Power Fixed September 2009
SPFNSC=Scottish Power Fixed Sep 2009 No Standing Charge
EDF=EDF Price Protection 2009
BGPG=British Gas Price Guarantee 2009
(all Eastern region, just looking at the price of fuel - no extra discounts included)

The trouble is that some providers don't publish their prices (yes that means you, Eon) and I don't want to get tied up in worrying about Direct Debit discounts, cashback etc etc. I just wondered if anyone had done a similar but better price graphing site? Or a raw data feed I could use to build my own?