Heavy tank
The Char 2C was one of the largest tanks ever produced. At the start of World War II, France and the Soviet Union were the only countries to have inventories of heavy tanks, such as the Char B1, T-35, and KV-1. The Matilda II was designed under the British infantry tank concept which is similar to the heavy tank having thick armor and weighing more than their other tanks. It’s usually separate because they have less firepower with their cruiser tanks (comparable to mediums) at the time having the same main armament but more machine guns. Later war examples were the German Tiger I and II, as well as the Soviet IS series. Note that "heavy" versus "medium" is more a question of tactical roles than weight; the Panther, for example, was a "medium" tank that outweighed most Allied "heavy" tanks.
Char G1
"Baudet-Donon-Roussel" proposed to build a tank with the general outlines of the Char B1, including a high return track run, but with seven road wheels per side that unlike the B1 did not require a daily greasing, instead using sealed ball-bearings. The track was to have a continuous rubber (Pendelastic) inner lining. The project was to have the following dimensions: a length of 556 cm; a width of 280 cm and a height of 285 cm. It thus was the largest and heaviest of all proposals with a weight of 28,5 tonnes. Track width was to be 35 cm. The normal wading capacity was to be 145 cm; BDR thought it also possible to make the tank fully immersible to cross rivers while being guided from the river bank. It was planned to install an air-cooled Potez 12V 320 hp engine, placed transversely in the hull. The transmission was petro-electrical and of the Gebus-Roussin type. The fuel tank was to have a capacity of 520 litres. The armament was to consist of a 75 mm SA35 howitzer in the hull with 70 rounds. In the 1937 configuration, the tank was to have an APX4 turret with a 47 mm SA35 gun with 102 rounds. As the hull was wide enough to place the 75 mm gun in its middle, the turret should have been moved to the left, but this was forgotten in the proposal, as the commission pointed out.