Differences in Nature and Application

48V:The "nominal charging voltage" for lead-acid batteries. It is used for standard charging, during which the voltage gradually rises until it reaches the full-charge voltage (e.g., 54.75V).

54.75V:The "full-charge voltage" for lead-acid batteries. It is primarily used for float charging—a maintenance phase at the end of the charging cycle—to prevent overcharging and extend the battery's lifespan.

58.4V:The "nominal charging voltage" for lithium iron phosphate (LiFePO4) batteries. It is designed to work with a three-stage charging process (constant current, constant voltage, and trickle charge), aligning with the specific charging characteristics of lithium batteries to prevent overcharging and cell swelling.

Differences in Compatibility and Device Suitability

48V:Applicable *only* to devices powered by lead-acid batteries (e.g., standard electric bicycles, small-scale lead-acid energy storage units). These two voltages can be used in tandem (48V for standard charging, 54.75V for float charging). They *cannot* be used with lithium batteries; doing so will result in battery damage.

54.75V and 58.4V:Applicable to devices powered by 15-series or 16-series lithium iron phosphate batteries (e.g., electric forklifts, floor sweepers, outdoor energy storage units). They are completely *incompatible* with lead-acid batteries; misuse will lead to lead-acid battery swelling, electrolyte leakage, or even fire.