Abstract: An energy storage system is selectively mountable to a vehicle and includes a frame, a battery supported on the frame, and a frame mounting interface. The frame includes a base surface and a mounting surface. At least a portion of the base surface is positioned in a plane oriented at an acute angle relative to a direction that is perpendicular to the mounting surface. The base surface may rest on a ground surface while the frame is not mounted to the vehicle. The frame mounting interface is positioned adjacent the frame mounting surface. The frame mounting interface may engage a chassis mounting interface positioned on a chassis of the vehicle, and the engagement of the base surface with the ground surface causes the frame mounting interface to be positioned in an orientation that may facilitate engagement with the chassis mounting interface while the frame is not mounted on the vehicle.

Abstract: An energy storage system is removably coupled to a vehicle and includes a frame, a battery supported on the frame, and a frame alignment system. The frame includes a base configured to rest on a support surface while the frame is uncoupled from the vehicle, and a first mounting feature configured to engage a complementary second mounting feature positioned on the vehicle. The battery is configured to provide power to the vehicle while the energy storage system is coupled to the vehicle. The frame alignment system includes a guide surface configured to engage the second mounting feature as the frame is coupled to the vehicle, the engagement between the guide surface and the second mounting feature facilitating alignment between the first mounting feature and the second mounting feature.