Operating Instructions
Lifetime of the battery:
• Recharge deeply discharged batteries immediately:
Incipient Sulphation of the lead battery plates due to deep discharge
is to be prevented by charging soon, particularly in case of high
ambient temperatures. If the grade of sulphation is not too intensive,
the battery can recover part of the battery capacity after several
charging/discharging cycles. Deep discharge of LiFePO4 batteries is
absolutely to be avoided!
• Partially discharged batteries:
In contrast to other battery types, lead and LiFePO4 batteries do not
have any harmful memory effect. As a result, in case of doubt, partially
discharged batteries have to be charged fully as soon as possible.
Always store only fully charged lead batteries. Recharge them
periodically, particularly in case of used (older) batteries and higher
temperatures.
• Keep the batteries cool and dry, LiFePO4 batteries preferably above
0°C. Choose an appropriate location for installation.
• In case of insufficient solar power and/or high current consumption,
the lead battery should be subject to occasional full charging by means
of a mains supply charger.
• Overvoltage Protection:
The 12 V solar controllers protect themselves against connection
of excessive battery voltage rates or will be switched-off in case of
defective additional charging systems (chargers, generators or similar
systems), switching threshold 15.0-16.0 V, depending on the battery
type.
• Overvoltage Limitation:
Sensitive consumers are protected by means of a limitation of the
charging voltage to max. 15.0 V during all modes of charging.
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