Request Conditions For The Electricity Grid; Operating Modes For The Electricity Grid - SMA SUNNY ISLAND 8.0H Installation Manual

SMA Solar Technology AG
10.10.3 Request Conditions for the Electricity Grid
To adapt grid management to the requirements of the off-grid system, you can change the request
conditions of the electricity grid.
Request for the electricity
grid
State-of-charge-dependent
request
Load-dependent request
Time-controlled request
Charging-process-dependent
request
10.11 Operating Modes for the Electricity Grid
The off-grid inverter distinguishes between two operating modes.
Charge mode:
Charge mode on the electricity grid is characterised by the off-grid inverter charging the battery or
receiving battery charge.
Silent mode:
The off-grid inverter saves energy in silent mode. In silent mode, the off-grid inverter is in standby and
the electricity grid supplies the loads. The off-grid inverter regularly exits silent mode in order to
recharge the battery.
If the off-grid inverter is in silent mode, a grid failure can lead to a brief failure of the stand-alone grid.
In this case, the loads are temporarily not supplied with power.
Installation Manual
Explanation
Depending on the state of charge of the battery, grid
management requests the electricity grid to recharge the battery.
In this way, grid management prevents the battery from
discharging too much. Tip: You can also set the request to be
dependent on the time of day.
If the consumption load in the stand-alone grid exceeds a
configured limit, grid management requests the electricity grid.
The electricity grid then supplies power to the loads. This reduces
the load on the battery.
You can set the days, times and durations for electricity grid
request by grid management.
You can configure whether the electricity grid is activated for full
charge, equalisation charge or both charging processes.
10 External Energy Sources in the Off-Grid System
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