Essentially, it was a half-track with the ball of a Tesla coil mounted on top, which was omnidirectional. The Tesla tank was used as a long-range support unit for main battle tanks such as the heavy tank, and sometimes also as a scout, since it was relatively fast compared to other soviet vehicles. The Tesla tank also jammed enemy radars if it got close enough to a radar dome.
The tank was reasonably fast (owing to its half-track design) and its weapon was effective against all surface targets. However, its advantages come at the price of high costs of manufacture, as well as thin armor. The Tesla weapon also had a relatively long cooldown time required to recharge the capacitors, making it vulnerable in a combat situation with several opponents.
This tank was not widely deployed and was only used on some occasions. Two versions of it have been reported to exist: the first was mounted on a mobile command center chassis and looked very similar to it. The second was notably bigger and saw more deployments. Both however performed almost identically, with the first version having less armor but more firepower than the second one.
Some important operations where Tesla tanks were present included the protection of the Sarin nerve gas facilities, the destruction of the Allied MiG prototype. Tesla tanks were also present in Siberia to defend the nuclear production facilities. They were also used by the Soviets to destroy the Chrono tank prototypes and to defend the base near the Super tank testing grounds, among other deployments.
After the war a new version of the tank was created but it still was not widely deployed.
The Tesla tank only appears in the two expansion packs of Red Alert, Counterstrike and The Aftermath.
In Counterstrike, it appears in both sides' campaign, but is not normally buildable in Skirmish mode, however can be with a glitch. (You cannot have Aftermath installed. Simply load a mission where the Tesla Tank exists, exit the mission and start a Skirmish match, the existing Radar Truck will now have the Tesla weapon)
In The Aftermath, it was made available in skirmish and in some missions in the campaign. The Tesla tank of Counterstrike uses the sprite of the Radar jammer, while in the Aftermath it its own appearance. The Tesla tank has a long range (outranges Turrets and Pillboxes), but is vulnerable to being outnumbered. It is also incapable of responding to air attacks.