Steel Tec was a model construction system by Remco Toys, Inc. and made in China. It was on the market from 1992 - 1997. It is generally compatible with Meccano using the same hole pitch and thread type. In most cases missing parts can be substituted with Meccano parts which are currently available.
This robot by Gary Mayhak has only 2 motors. The solar panel recharges the batteries. You can see a SVX controller mounted at the rear.