IMPORTANT: every Studer systems absolutely require power from the battery to operate. If your battery reaches 0%, the system will shut down completely and will not restart unless the battery is recharged using an external charger. The inverter can not start without a voltage supplied from the batteries and can not recharge the battery even if there is solar or an AC source available.
What can I do if the battery reach 0% and the system shutdown?
In this case, the only solution is to charge the batteries using an external charger that matches their voltage. We recommend contacting the battery manufacturer to determine the most appropriate voltage and settings for this situation. Once you know the charge voltage, disconnect your battery pack from the inverter and charge each battery separately to the same level (for example, 20% for each battery). Once all the batteries are charged to the same level, reassemble your battery pack and connect the batteries to the inverter. You can then power on the batteries and restart the inverter, which will once again receive power from the battery and be able to operate. Important: Before restarting the system, please make sure you have a power source capable of recharging the batteries (solar energy, AC source, genset…). We recommend that you keep all power-consuming devices turned off until the charge level is high enough to allow you to use them again and prevent the batteries from reaching again 0%.
What can I do to prevent this problem from happening again?
This problem is usually caused by incorrect system settings (incorrect battery configuration) or an improperly sized installation (for example, excessive power consumption, insufficient solar energy, or the lack of a grid connection or generator).
- Check the battery settings. We recommend not allowing the system to use 100% of the battery’s capacity. To achieve this, a SOC for backup of 20% is recommended, as well as a SOC for end of discharge of at least 15%.
- If the problem persists after making the recommended adjustments, we recommend either increasing the system’s capacity (by adding more solar panels, a generator, a wind turbine, or any other source that can prevent this issue) or reducing the power consumption of the loads connected to the system.