For the solar panels - was it reported by an independent organization or reported by China?

I am afraid it's the same fake metric as with the electric scooters earlier. China subsidized them, so companies vastly overproduced dinky scooters to milk subsidies, inflate their numbers and inflate connected sharing businesses with a huge fleets. Those now sit in huge piles of electrowaste, which predictably explode in a beautiful toxic lithium fires 🔥.

Same happened earlier with cheap electric bikes and motorbikes.

Same happened earlier with cheap electric cars.

And we are talking here only about mountains of overproduction that cannot be hidden. God knows how much of the number was inflated along the chain of reporting, as is customary in China.