A product name often describes the system class. The actual nominal voltage, full-charge voltage and discharge limits are separate specifications that matter when integrating a battery.

Voltage class is not the complete voltage specification

CY’s 12V-class LiFePO4 catalogue platforms have a nominal voltage of 12.8V. The 48V-class motive platform listed on this site is 51.2V nominal. These labels do not establish compatibility with an existing charger or controller; compare the complete voltage window.

Use watt-hours to compare nominal energy

Nominal energy in Wh is nominal voltage in V multiplied by capacity in Ah. For example, 12.8V × 100Ah = 1280Wh, while 51.2V × 100Ah = 5120Wh. Both are 100Ah packs, but they have different nominal energy and system voltage.

Nominal energy is not guaranteed usable energy

BMS cut-off settings, discharge rate, temperature, age and the equipment’s conversion losses affect delivered energy. A simple Wh ÷ W calculation is an initial estimate, not a verified runtime. Validate the complete system with representative loads.

Check current as well as capacity

Capacity does not specify the current a pack can continuously supply. Ask for the continuous and peak current limits, peak duration and relevant test conditions. The BMS, cells, wiring, connectors and thermal design must all support the intended load.

Use the nominal voltage and energy to compare platforms. Use the full electrical and mechanical specification to confirm suitability.

Start the conversation

This guide supports initial project discussions. Model-specific limits and the equipment manufacturer’s instructions take precedence during integration.

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