BERLIN (Reuters) – Germany’s Sono Motors has signed up a new partner for its partly solar-powered cars and is sticking to its goal of commercial production in 2023, after abandoning talks with the electric carmaking arm of indebted Chinese property developer Evergrande. Sono said on Tuesday it would produce its first vehicles in Finland with supplier Valmet Automotive, rather than in Sweden as originally envisaged. The company had said in 2019 its production partner would be National Electric Vehicle Sweden (NEVS), the Swedish electric vehicle unit of Evergrande Group, but a binding agreement …