Lets look at price of thermal coal in China

https://www.sunsirs.com/uk/prodetail-369.html

830 RMB/ton for a coal with calorific value: 5500 kcal/kg

This gives thermal cost of heat 5 USD/GJ .

"The Middle East and Africa achieved the lowest levelised cost of electricity (LCOE) among regions in 2025, with an LCOE of US$37/MWh, while the LCOE of utility-scale solar PV in China reached US$27/MWh."

https://www.pv-tech.org/solar-pv-retains-most-competitive-lc...

Solar US$27/MWh can be converted to 7,5 USD/GJ.

How much changes the cost when you have industrial application which needs energy 24/7 ?

Nuclear is an answer along with other sources. Opposition to nuclear by the Green Party in the UK is a self-sabotage IMHO. They may argue how limited government subsidies should be allocated but outright opposition to nuclear energy is just stupid to me.