LiFePO4 at din

About emergency lighting | 08. March 2023

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Lead-acid battery or lithium-iron-phosphate?

Proven battery technologies at din

Different battery technologies are of great importance for users regarding their areas of application and properties. The choice of the right battery technology for an emergency lighting system depends on several factors. Depending on the environmental conditions, there are different requirements concerning the battery technology used. We highlight the general differences and special features of LiFePO4 and lead-acid battery technology.

The lithium-iron-phosphate battery (LiFePO4) or also called LFP belongs to the group of lithium-ion batteries. It is currently the safest lithium technology, it is considered intrinsically safe and has been widely used in practice for more than 15 years. It therefore fulfils the basic requirements for using LiFePO4 technology in addition to the proven lead-acid technology in our decentralised SU NET and fire-resistant SU ESF30 systems.

In application, there are different advantages for the two battery technologies:

LiFePO4 at din
LiFePO4 battery:

LiFePO4 battery:

  • Proven & safest lithium technology
  • No VEXAT document necessary
  • No gassing
  • 50,000h/5.7 years din full warranty for +10 °C to +35 °C ambient temperature
  • Operating range from 0 °C to 40 °C
  • High cycle stability
  • No ventilation required
  • Low weight
  • High intrinsic safety
  • Safe protective circuit
  • No toxic heavy metals contained
Lead-acid battery:

Lead-acid battery:

  • Proven & safe technology
  • Inexpensive to purchase
  • 50,000h/5.7 years din full guarantee for +18 °C to +22 °C ambient temperature

Both battery technologies score in different ways. Lead-acid technology is convincing because of its low purchase costs and long lifetime at a relatively constant ambient temperature of 20 °C.  However, the lifetime decreases with increasing ambient temperatures per °C.

LiFePO4 technology, on the other hand, additionally shows its strengths at higher temperatures > 28 °C and a high durability of the lifetime under these ambient conditions. The higher purchase costs are put into perspective over the course of the operating life, as the replacement cycle is significantly lower compared to lead-acid batteries. In applications where ventilation cannot be implemented (e.g. historical buildings), the LiFePO4 battery is a very good choice because it is gas-free.

Specific requirements of an application

Ultimately, the choice between lithium-iro- phosphate batteries and lead-acid batteries depends on the specific requirements of an application. Both technologies have their justification and, in conjunction with our innovative SU NET systems, form a perfectly coordinated total solution package.

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