system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 - Why does renewable-generated electricity go up with the cost of non-renewable?

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)?
gpt
Simple.

Your energy provider isnt an energy producer. They just BUY the energy from producers and sell it to customers like you.

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The total supply of energy is under pressure from obvious sources, so those prices rise.

The renewable energy sources thus become more interesting for all potential buyers.

The supply is limited, but demand rises, so the price goes up.

The owners of these green energy producers wind/solar/water/nuclear, power plants are making more money because their costs didnt rise, but their sales prices did.