Within the US downstream sector, there is a weary impatience that slips easily into anger with SolarWorld and its unbending demand that its Chinese rivals be put through the ringer.

The thinking in the downstream sector goes like this: So what if Beijing and local governments give cheap land or loans to domestic PV manufacturers? Or if those companies are a tad too aggressive in their pricing in overseas markets, maybe selling below cost on the odd occasion? Considering how young solar energy is in the US and how many powerful enemies it still has, doesn’t it deserve any break it can get?

Such sentiments are understandable, but no matter how irritating it may seem to some, SolarWorld — which operates the...