The DC module “Direct current” is an additional module of elec calc™. It allows the design and sizing of low voltage electrical installations in direct current, up to a voltage of 1500 VDC. Completely integrated into the elec calc™ software, it maintains all of its functionality and ergonomics and allows the creation of installations mixing DC and AC parts. It meets the sizing needs of auxiliary networks (control and command) and general distribution, excluding those relating to specific standardization or regulations (photovoltaics, rail traction, etc…).