Voltage sense
Voltage Sense uses battery voltage data that is accurately measured directly at the battery terminals (or very close) and provides it to the charger, the charger then uses this voltage data to dynamically increase the output voltage and precisely compensate for voltage drop in the cabling and connections between the charger and battery.
This enables the battery to be charged with the exact voltage as configured in the charger, instead of a lower voltage due to voltage drop in the cabling and connections.
Voltage drop is proportional to the charge current and cabling/connection resistance (V=IxR), so voltage drop will vary during a charge cycle and can be quite significant when charging at higher charge currents through cabling and connections with higher than optimal resistance; in this scenario voltage sense will be particularly beneficial.
Note that voltage sense does not allow inadequately rated cabling/connections to be used or compensate for excessively high voltage drop; for reliable and safe operation cabling and connections must all be suitably rated and appropriately sized for the application; refer to the 'Installation > Wiring' section for more information.