The judicial commission probing into the solar panel scandal has summoned Kerala Chief Minister Oommen Chandy to testify as a witness. The commission, headed by retired High Court judge G Sivarajan, will record Chandy’s testimony in Thiruvananthapuram on January 25. The solar scam refers to the allegations of irregularities in the solar panel business run by Biju Radhakrishnan and his then companion Sarita S Nair.