SMA Solar Technology AG Electrical Connection
Installation Guide SMC9-11TLRP-IEN100640 49
5.8.2 Setting Off-Grid Operation
To operate the inverter in an off-grid system with Sunny Island, you must set the inverter via the
"Default" parameter to off-grid ("OFF-Grid") operation.
You have several possibilities to set the inverter to off-grid operation:
• Setting via Sunny WebBox
or
• Setting via Sunny Data Control or Sunny Explorer.
5.8.3 Additional Country Parameter
The deactivation criteria (voltage, frequency) are specified via country parameters for all Sunny Mini
Central inverters.
Type SMC 9000TLRP-10 / 100000TLRP-10 / 110000TLRP-10 Sunny Mini Centrals have an
additional default country parameter "MVtgDirective". This parameter expands the deactivation limits
of the inverter for voltage and frequency to a maximum / minimum. This country setting may only be
selected if the plant or inverter is operated with an external three-phase decoupling protection, which
disconnects the Sunny Mini Central from the grid automatically if non-permissible voltage and
frequency values occur. Device protection is still guaranteed.
DANGER!
Danger to life due to high voltages in the event of outage of the public grid.
If you set the inverter to off-grid operation, it does not fulfill any country-specific standards
and regulations. Therefore, if there is an outage of the public grid, there is a danger of back
feed.
• Never operate the inverter directly on the public grid when set to off-grid operation.
Requirements for the setting
Set the installation country as described in section 5.8.1”Setting the Installation Country”
(page48) before setting the country parameter described here.
DANGER!
Risk of lethal electric shock if external decoupling protection is missing!
If the country setting is "MVtgDirective", the Sunny Mini Central with Reactive Power
Control may only be operated with an external three-phase decoupling protection device
which complies with the country-specific requirements.
Without this external decoupling protection, the Sunny Mini Central does not disconnect
from the grid when the standard requirements are exceeded.
• Install external three-phase decoupling protection.
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