7 Commissioning SMA Solar Technology AG
98 SI80H-60H-OffGrid-IA-en-11 Installation Manual
If you wish to control the utilisation of excess energy, set the multi-function relay as follows:
1. Switch to installer mode (see Section 7.5).
2. Select the 241.07 ExtPwrDerMinTm parameter and set it to the minimum time that the
multi-function relay remains in the NO position.
3. Select the 242.08 ExtPwrDerDltVtg parameter and set it to the voltage difference relative to
the target value of the cell voltage during float charge.
4. Ensure that the multi-function relay used for control is set to ExtPwrDer (see Section 7.10.2).
7.11 Changing the Battery Protection Mode
Function of the battery protection mode:
Battery protection mode protects the battery.
If the battery falls below the limiting values for the state of charge (SOC), the battery protection mode
activates. In battery protection mode, the off-grid inverter switches to standby or automatically
switches off. Battery protection mode has three levels. There is one SOC limiting value that can be set
for each level. Levels 1 and 2 of battery protection mode are time-dependent with start and end times
(see Section 7.7"Setting Time-Dependent Functions",page89).
• Level 1
If the battery falls below the SOC limiting value for level 1, the off-grid inverter switches to
standby between the start time and end time. In this way, you can specify times for which you
prefer the stand-alone grid to be switched off if there is an energy deficit.
Charging process Parameter Default value
Boost charge 222.07 ChrgVtgBoost VRLA 2.40 V
FLA 2.55 V
Full charge 222.08 ChrgVtgFul VRLA 2.40 V
FLA 2.50 V
Equalisation charge 222.09 ChrgVtgEqu VRLA 2.40 V
FLA 2.50 V
Recording of the measured values of the cell voltage reacts to changes with
time-lag
The off-grid inverter calculates the cell voltage from the measured battery voltage.
The off-grid inverter calculates an average from the measured values of the battery
voltage. As a result of the calculation of an average, the cell voltage that is recorded
reacts to changes with time-lag.
To Next Page
Loading...
