$0,01 per kWh from solar, that is the price worldwide on the condition that they sell you the panels at a reasonable price and don't overcharge you on all the other parts like micro-inverters, field or rooftop installation, permitting and labour. That adds up to around 5 cent for rooftop solar in Australia for example (including everything). 1 cent is for solar panels lasting 50 years (with 20% degradation over decades), we refer to such prices as Levelised Cost Of Energy (LCOE) over lifetime. It halved in the last 10 years for solar and it will halve again (20% cost reduction on each doubling of manufactured capacity). Similar for batteries, they also go down around 20% each year.

1 kWh Wind, or Hydro, Thermal and other renewables do not go down as much in cost price because they have mechanical or chemical components that do not last as long as solar cells and need maintenance and repair.

We keep the cost low by group buying in bulk at wholesale prices (a shipping container with 770 panels for 20-30 houses) with our coop instead of premium installer prices by the electrotechnical or building companies. If you let our Fiberhood coöperative in the US install your solar, batteries, tiny house or eCamper you do not pay these high tariffs, we have enough panels pre-tariff. So you still can hit 1 cent per kWh but only if you get the decent installers and sellers.