A Century of Deep-Cycle Battery Expertise Founded in 1925 by George Godber and Carl Speer, Trojan Battery Company has become the world's leading manufacturer of deep-cycle solar and powertrain batteries, with a wide range of energy storage solutions including deep-cycle flooded lead-acid, Trojan AES, AGM, and lithium-ion batteries. With nearly 100 years of battery manufacturing experience, we have shaped the world of deep-cycle battery technology.