What is the 'Shakti patam' that happened in Shrisailam from Sun-god?

Swāmi Replied:- Śaktipātam is only the transfer of power of God to a devotee without the entry of God into the devotee. Even demons attained the miraculous powers from God. Actually, the real background is that God is never separated from His power. When God transfers His power to a devoted demon due to his rigid penance, it only means that whenever the demon is performing a miracle, invisible God is performing that miracle from outside so that it appears as if the miracle is performed by the devoted demon. This is the process of the miraculous power of a good devotee also. Only in the case of incarnation, God performs the miracle directly since God is identified with that medium. This does not mean that incarnation is greater than a sincere good devotee. In incarnation, God became one with the medium whereas in the case of devotee, God became the servant of the devotee performing the miracles as per the wish of the devotee.