55V

55V refers to a potential difference of 55 volts, commonly used to describe DC systems in consumer electronics and industrial equipment. In practical terms, 55V DC is high enough to pose a risk of electric shock under certain conditions, but it is lower than many high‑voltage systems, and equipment designed for it must be appropriately rated.

In battery technology, 55V often appears as the nominal or maximum pack voltage for lithium‑ion configurations. For example, a lithium‑ion pack made from 13 cells in series has a nominal voltage around 46–48V and a fully charged voltage near 54.6V; packs configured with 14 cells in series reach about 58.8V when charged. Marketing labels such as 55V or 52V are commonly used to describe these ranges, even though exact voltages depend on cell count and chemistry.

Common applications include electric bicycles, portable power stations, and telecom or data‑center power systems that use DC distribution in the 50–60V range. Designers must consider insulation, creepage and clearance distances, and components rated for at least 55V when specifying cables, connectors, switches, and enclosures.

Measurement and safety: To verify a circuit is at 55V, use a properly rated DC voltmeter with the circuit de‑energized or with appropriate safety procedures if measuring live. Handle energy storage systems with care to avoid short circuits and, when possible, discharge stored energy before servicing.

See also: low‑voltage safety thresholds and DC distribution standards.