Auxiliary power tap assemblies for battery energy storage systems and battery energy storage systems and methods including same

A method for providing auxiliary power from a power supply to a BESS unit of a battery energy storage system (BESS), the BESS unit including an energy storage battery and an auxiliary power unit including an auxiliary power connection terminal, the method comprising:

• forming an auxiliary power supply network including:
• an auxiliary power trunk cable electrically connected to the power supply;
• and
• an auxiliary power connection system including an auxiliary power tap assembly including:
• a tap cable;
• an insulation piercing connector (IPC);
• and
• a fuse;
• wherein:
• the IPC is engaged with the auxiliary power trunk cable to electrically couple the tap cable to the auxiliary power trunk cable;
• the tap cable electrically connects the auxiliary power trunk cable to the auxiliary power connection terminal;
• and
• the fuse is connected to the tap cable electrically in-line between the IPC and the auxiliary power connection terminal.

A pre-assembled auxiliary power tap assembly for forming an auxiliary power supply network to provide auxiliary power from a power supply to a BESS unit of a battery energy storage system (BESS), the auxiliary power tap assembly comprising:

• a tap cable including a tap cable conductor;
• an integral insulation piercing connector (IPC) engaged with the tap cable and electrically contacting the tap cable conductor;
• and
• an integral fuse folder connected in-line on the tap cable;
• wherein:
• the IPC is configured to engage an auxiliary power trunk cable to electrically couple the tap cable to the auxiliary power trunk cable;
• and
• the tap cable is configured to electrically connect the auxiliary power trunk cable to an auxiliary power connection terminal of the BESS unit.