TAN includes a 2.8% weight in SOL, 3.9% in JKS and 5.2% in CSIQ. KWT holds 0.6% in SOL, 3.2% in JKS and 4.8% in CSIQ.

TAN has gained 13.0% year-to-date while KWT is up 9.2%. The two ETFs have been among the best performers, with TAN up 116.1% over the past year and KWT 89.2% higher.

Guggenheim Solar ETF

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Max Chen contributed to this article.