Temperature windows, ventilation and enclosure sizing for a pack.
Temperature windows and derating
Capacity and current derate outside 15–35°C; plan for the worst month, not the average.
- What’s Special About DL+ 12V 320Ah Heated Battery
- How Temperature Extremes Affect 24V LiFePO4 Battery Performance
- How Can Temperature Management Affect the Performance of 12V LiFePO4 Batteries
- How Do 36V LiFePO4 Batteries Prevent Thermal Runaway and Other Hazards
- How Does Temperature Influence Battery Capacity
- Impact of Ambient Conditions on 36V Lithium Batteries
Ventilation, IP rating and enclosure space
An enclosure that cannot shed heat turns a good pack into an ageing one.
Questions
Short answers to the ones that come up most.
Does temperature change capacity?
Yes — expect 10–20% less at 0°C and more current derating in the heat.
Do I need ventilation?
Yes, for heat removal, even though lithium does not vent hydrogen.
What IP rating do I need?
IP65 for most outdoor installations; higher for washdown or marine.
