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3.2
Installation of several batteries in series or parallel connection
LiFePO4 batteries can be connected in series and/or parallel, please note:
•
Before installation, make sure that the batteries have max. 50mV voltage deviation from each other, if
this is not the case, charge both individually to 100%, then equalise by discharging individually.
•
When connected in series (max. 4 batteries), the voltage increases, but the capacity does not increase.
•
With parallel connection (max. 4 batteries) the capacity increases, the voltage does not change. The
currents for both charging and discharging increase accordingly.
•
A circuit in which the batteries are connected both in series and in parallel is theoretically possible, but is
not recommended.
•
In the case of series or parallel connection, the cable lengths of the positive and negative cables should
be the same for the connections between them. The cross-sections must also be the same.
•
Consumers and charging devices should be connected „diagonally" in the case of parallel connection, i.e.
plus from the first battery, minus from the last or vice versa.
Here are examples of series and parallel circuits:
Series circuits:
3.3
Maintenance
•
LiFePO4 batteries require no regular maintenance other than cleaning with a damp cloth; they are abso-
lutely maintenance-free.
•
Nevertheless, check the tight fit of the pole terminals from time to time.
•
Cyclical use once a year is recommended, charging to 100%.
3.4 Storage and decommissioning
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If the battery remains installed in the vehicle for longer than 6 months and is not used, disconnect the
terminals from the battery if possible or switch off the battery isolator switch.
•
If the battery is stored removed from the vehicle, the terminals should be protected with a protective
cap or masked off; storage in a dry place at a temperature of approx. 20°C is ideal.
•
Before storage, please charge to approx. 70-80%, this gives enough leeway to compensate for the
self-discharge (<3% per month) and to store for several months.
Parallel circuits:
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