WeCo Srl Italia
www.wecobatteries.com
4K4 PRO V 1.11 28-9-2021
Many chemical reactions are effected by temperature, and this is true of the reaction that occurs in
a storage battery.
The chemical reaction of a Li-Ion is slowed down by a lowering of the electrolyte temperature that
results in less capacity.
A battery that will deliver 100% of rated capacity at25°C will only deliver approximately 75% of
rated capacity at 10°C.
At temperatures below -7°C the BMS will allow only 0.1C charging Current below -7°C the charge is
forbidden.
As part of the performance Warranty, Charge and Discharge shall be in the range 20-25°C 0,5C any
usage outside this range is not covered by Performance Warranty
Depth of Discharge (DoD)
Depth of discharge is a function of design. The deeper the discharge per cycle, the shorter the life
of the battery. A cycle is a discharge and its subsequent recharge regardless of depth of discharge.
The number of cycles at a specific DoD and the projected life in years the battery / battery system
will provide prior to needing replacement.
Charging
Majority of battery capacity/life issues can be traced to improper charging. Improper charging
settings may lead to an overcharging or undercharging condition.
WeCo guarantee only batteries connected via BMS line to the Approved inverter
Typical Inverters/Charge Controllers are equipped with CAN/BMS interface ad no settings are
required to charge and discharge the battery.
Warranty
Although the BMS of the battery allows a wide range of use both in terms of temperature and
charging currents, this should not be construed as an implicit authorization to use the battery at
these levels.
For the purposes of the performance guarantee, it is mandatory that the battery is used within the
range of temperature and charge / discharge current and Depth of Discharge indicated in the
performance guarantee.
Any other use, even if permitted by the BMS ranges, is not covered by a performance guarantee
