This paper illustrates a full design of charge controller regulate the charge of 155 Ahr,12V lead acid battery. This battery has wide applications especially with agricultural equipments such as tractors, scrapers, loaders.........etc. In agricultural remote areas in Egypt, battery play important role in agricultural environment. This due to that, the batteries are a source of electrical energy in all modern agricultural equipments. Consequently, the regulation of its charge becomes very important due to increase the equipment performance reliability. The paper presents all design steps of the whole circuits of proposed battery charger controller. The battery is charged from solar cell array. This type of charge system is very suitable for the previous agricultural remote areas. The designed charge controller may be used with different charge system rather than solar cells array. The paper presents also the test of all controller elements in the operating field.