eli5 – Why does renewable-generated electricity go up with the cost of non-renewable?

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My UK energy provider says my electricity is produced with 100% renewables, so I presume water, wind, solar. So why am I affected by such big increases in electricity charges (price per kWh)?

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Anonymous 0 Comments

Renewables not including nuclear were about 10% of national grid output over the last week.
A: All of us on renewable energy tariff are getting renewable only, I think it’s unlikely.
B: if non renewable price goes up then all prices go up as suppliers will purchase renewable.
C: bill is made up of wholesale cost, a renewables tax (around 25% of bill I think), tax, markup, so actual costs of power aren’t the sole component.

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