Polysilicon prices have risen for five weeks running, with the highest price observed being $33.60 dollars for a kilogram of monocrystalline-grade, while polycrystalline-grade is $18.60. Monocrystalline, which is the more important category, observed a 3% rise last week and a 2% rise this week. With at least three grams of polysilicon needed per watt of manufactured silicon photovoltaics, this means polysilicon now costs at minimum $100.8 per kW of monocrystalline PV, and $55.8 per kW of polycrystalline PV. A typical utility-scale solar plant costs $1,000 per kW – so the tripling of the polysilicon price since its 2020 nadir has increased the cost of building a solar plant by 7%, even including all the non-Balance of Systems (BoS) costs such…