Top solar companies, banks and insurers have stopped doing business with at least a half dozen recently ?built U.S. panel factories because of uncertainty over whether their ties to China could disqualify them from clean-energy subsidies, according to industry executives and documents reviewed by Reuters. The ?shift, driven by new Trump administration policies, jeopardizes more than a third of U.S. solar capacity in factories initially built ?by Chinese ?firms. Details of how the policy uncertainty is driving installers and insurers away from U.S. solar factories with China ties have not been previously reported. The emerging effects dovetail with U.S. President…