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"Standby" (only MPP 170 CI):
• Short flashing every 2 sec.:
Display of readiness for service in case of missing solar power (at night).
All light-emitting diodes are flashing simultaneously:
The positions of the selector switches for the main/leisure battery are incorrect. For reasons of safety, the solar
controller is switched-off. Adjust the desired battery type according to table 1.
Operating Instructions:
• Lifetime of the battery:
• Recharge totally discharged batteries immediately:
Incipient Sulphation of the lead battery plates due to total discharge is to be prevented by soon charging,
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.
Total discharge of LiFePO4 batteries is absolutely to be avoided!
• Partially discharged batteries:
In contrast to other battery types, batteries on lead and LiFePO4 basis do not have any harmful memory effect.
Consequently: 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.
• Overload/Overheating Protection Solar Controller:
The solar controller is equipped with a double electronic protection against overload and with an automatic
protection against adverse installation conditions (e.g. insufficient ventilation, excessive ambient temperatures) by
gradual reduction of the charging capacity.
• Voltage Measurement: The voltage rates at the solar controller might by falsified by losses at the charging cables.
Never use the controller without battery.
• Operation with switched off LiFePO4 main battery:
• In case the battery is disconnected from the solar charging controller by the (prescribed) BMS, the latter will,
as long as the solar power is adequate, provide the set voltage at its output terminals according to the
characteristic line of charging. Consumer units continue to be supplied by the solar charging controller as long
as they have not been separately disconnected from the BMS and the solar power is adequate.
• Whether a battery disconnected by the BMS will switch back on by itself and can therefore continue to be
automatically charged by the solar charging controller depends on the type of battery and its BMS.
• The charge of the starter battery continues to be retained if there is sufficient solar power.
In case of unattended operation, the battery might be totally discharged due to too many consumers and lack
of solar power. We recommend an (undervoltage) protection for the battery by means of the following
appliances:
Votronic Battery Protector 40
(Power rating 12 V / 40 A) Order No. 3075
or
Votronic Battery Protector 100
(Power rating 12 V / 100 A) Order No. 3078
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