Cos of the way it worked out I only saved about 80p. They average out your use over the same periods preceding the event. One week I had negative priced electricity so I'd maxed out on car charging which killed my average. And at the times of the events my eccy price was low (or negative) anyway so the payback was small.
Hardly worth bothering for me!!
Still my average cost per kWh for Aug is 6.99p which isn't bad (472kWh)
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