Actually it seems there is quite a lot of conflicting info... o One site - E10 offers 3 split periods
---- 3hrs afternoon, 2hrs evening, 5hrs overnight o Another site - E10 offers 2 split periods
---- 3hrs afternoon, 7hrs overnight
I suspect it is simply regional variation...
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S&SE E10 periods vary based on locality
---- Midlands 5hrs overnight, 3hrs afternoon, 2hrs evening
---- Scottish 3hrs overnight, 3hrs afternoon, 4hrs evening o I recall a more significant variation elsewhere
---- may be E10 times are varied or have been varied
---- however I do not think they use over-grid signalling
---- I think they just use a ?Radio-4-beep-synch-signal?
That document also lists prices for customers. Manweb have the highest service charge/day I notice (24p) Midlands have by far the lowest service charge (11p).
There are further discounts re 6% for monthly D/D and prices include VAT - so basically knock the VAT off.
Additionally there are 3 suppliers of E10... o
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nPower o Southern Electric o Powergen
E10 might become popular if we can get some air heatpumps that have good efficiency at UK low temps - a la Canada ones. Not expensive "appliances", cheap to install, cheaper than gas or at least closer to parity & on-demand with good control.
What are Atlantic Energy & Gas prices for E7... o In the Manweb area for comparison
---- E7 peak -- 17.28p/unit for the first 900 units per year
---- E7 peak -- 9.40p/unit for the remaining units
---- E7 night -- 3.85p/unit for the 7hr period
---- prices exclude 5% VAT & 1-month-free discount (8.3%) o Glancing at the E10 prices, it seems a fair whack more
---- so much more I am not sure E10 is very economic
---- unless you have many storage heaters vs 1 as backup
I much prefer an air heatpump re on-demand & control, but am not convinced they will work well in a UK January.