A battery module arrangement configured for deployment with respect to a battery module compartment within a battery module mounting area of an energy storage system, comprising: a battery module configured to be inserted into and/or removed from an interior space of the battery module compartment via an insertion-side of the battery module compartment; a clamp-based insertion-side cover configured to be closed over the insertion-side of the battery module compartment, wherein the clamp-based insertion-side cover includes: an endplate (405; 600B; 600E) of the battery module, a compartment section of the battery module compartment, and a plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) that are integrated as part of the clamp-based insertion-side cover and are configured to secure the battery module inside of the battery module compartment by clamping the endplate to the compartment section, characterized in that: wherein each of the plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) includes a screw (505C; 505D), a clamping bar, and an endplate section (600B; 600E), wherein the screw (505C; 505D), is configured to be inserted through a hole in the clamping bar and into a fixation point on the endplate (405; 600B; 600E) which causes contact pressure to be applied by the clamping bar to the compartment section in a direction that is different from an insertion direction of the screw (505C; 505D) into the hole. a battery module configured to be inserted into and/or removed from an interior space of the battery module compartment via an insertion-side of the battery module compartment; a clamp-based insertion-side cover configured to be closed over the insertion-side of the battery module compartment, wherein the clamp-based insertion-side cover includes: an endplate (405; 600B; 600E) of the battery module, a compartment section of the battery module compartment, and a plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) that are integrated as part of the clamp-based insertion-side cover and are configured to secure the battery module inside of the battery module compartment by clamping the endplate to the compartment section, characterized in that: wherein each of the plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) includes a screw (505C; 505D), a clamping bar, and an endplate section (600B; 600E), wherein the screw (505C; 505D), is configured to be inserted through a hole in the clamping bar and into a fixation point on the endplate (405; 600B; 600E) which causes contact pressure to be applied by the clamping bar to the compartment section in a direction that is different from an insertion direction of the screw (505C; 505D) into the hole. an endplate (405; 600B; 600E) of the battery module, a compartment section of the battery module compartment, and a plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) that are integrated as part of the clamp-based insertion-side cover and are configured to secure the battery module inside of the battery module compartment by clamping the endplate to the compartment section, characterized in that: wherein each of the plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) includes a screw (505C; 505D), a clamping bar, and an endplate section (600B; 600E), wherein the screw (505C; 505D), is configured to be inserted through a hole in the clamping bar and into a fixation point on the endplate (405; 600B; 600E) which causes contact pressure to be applied by the clamping bar to the compartment section in a direction that is different from an insertion direction of the screw (505C; 505D) into the hole. wherein each of the plurality of endplate-to-compartment clamping arrangements (425; 430; 435; 615; 500C) includes a screw (505C; 505D), a clamping bar, and an endplate section (600B; 600E), wherein the screw (505C; 505D), is configured to be inserted through a hole in the clamping bar and into a fixation point on the endplate (405; 600B; 600E) which causes contact pressure to be applied by the clamping bar to the compartment section in a direction that is different from an insertion direction of the screw (505C; 505D) into the hole.