Tesla’s planned solar factory in Texas has landed in the middle of a US patent lawsuit between two Chinese solar equipment makers, both chasing the ingot-growing furnaces Tesla needs to hit its 100 GW goal.

Linton Crystal Technologies, a Rochester, New York company wholly owned by China’s Dalian Linton, sued Zhejiang Jingsheng in a Texas federal court last week. Chinese industry reports say Jingsheng won a roughly 3 billion yuan (about $420 million) Tesla order for crystal pullers earlier this year.