Lithium SuperPack LiFePO4 is the safest of the mainstream li-ion battery types. The nominal voltage of a LFP cell is 3,2 V (lead-acid: 2V/cell). A 12,8 V LFP battery therefore consists of 4 cells connected in series; and a 25,6 V battery consists of 8 cells connected in series.

Integrated BMS and safety switch

The SuperPack batteries are extremely easy to install, not needing any additional components. The internal switch will disconnect the battery in case of over discharge, over charge or high temperature. The batteries can be connected in parallel. Series connection is not allowed.

Efficient

In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance. The round-trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead-acid battery is 80%. The round-trip energy efficiency of a LFP battery is 92%.

The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiencies of 50% or even less in solar systems where several days of reserve energy is required (battery operating in 70% to 100% charged state).In contrast, a LFP battery will still achieve 90% efficiency under shallow discharge conditions.

Rugged

A lead-acid battery will fail prematurely due to sulfation:

  If it operates in deficit mode during long periods of time (i.e. if the battery is rarely, or never at all, fully charged)

  If it is left partially charged or worse, fully discharged (yacht or mobile home during wintertime)

A LiFePO4 battery does not need to be fully charged. Service life even slightly improves in case of partial charge instead of a full charge. This is a major advantage of LFP compared to lead-acid.Other advantages are the wide operating temperature range, excellent cycling performance, low internal resistance and high efficiency (see below).LFP is therefore the chemistry of choice for demanding applications.