The description of Lord Sun is given in great detail in the Vishwakarma Silpa as follows:
According to this his chariot should have one wheel and the Lord should have a lotus in each hand and seven horses should draw the chariot.
According to the Bhavishya Purana, on the right side the figure of Agni should be depicted and on the left that of Skanda.
The Lord's chariot is called Makaradhwaja. His two gatekeepers Danda and Pingala have swords in their hands.