It's most likely due to a rebate or cash back when changing providers. You can save a lot of money by switching providers every 12 months and taking cash back into account. If you have dispatchable loads (i.e. flexible charging of an electric vehicle) and a suitable electricity meter, you can also save a lot of money be choosing a dynamic tariff that tracks market prices (plus taxes etc).
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It's most likely due to a rebate or cash back when changing providers. You can save a lot of money by switching providers every 12 months and taking cash back into account. If you have dispatchable loads (i.e. flexible charging of an electric vehicle) and a suitable electricity meter, you can also save a lot of money be choosing a dynamic tariff that tracks market prices (plus taxes etc).