SMA SB 3000TL-US - Manual (Page 22)

5 Secure Power Operation SMA America, LLC
22 SB3-5TLUS22-BA-en-14 User Manual
5 Secure Power Operation
If the inverter has a secure power supply, you can use the energy from the PV plant directly via the
connected socket-outlet in the event of a grid failure. The inverter automatically regulates the energy
supply of the secure power socket-outlet according to the solar irradiation on the PV plant. While the
secure power socket-outlet is in use, the inverter is disconnected from the grid and does therefore not
feed into the power distribution grid. The secure power socket-outlet can not be used over-night,
because there is no solar irradiation available for the supply of the socket-outlet.
Requirements
☐ The inverter must be showing the error message 202, 203, 204, 205 or 801.
☐ There must be sufficient solar irradiation.
☐ Load with a maximum power of 1,500 W
Procedure for the secure power operation
1. Switch off the inverter miniature circuit-breaker.
2. Switch on the socket-outlet.
3. Plug in the load.
4. Switch on the load.
Do not connect any devices that require a stable electricity supply
The power available during secure power operation depends on the solar irradiation on the
PV modules. Therefore, the power can fluctuate considerably depending on the weather or
may not be available at all. In the event of solar irradiation being too low or overload of the
socket-outlet, the voltage supply of the secure socket-outlet will also be interrupted.
20 seconds after interruption, re-establishment of the voltage supply will be attempted
automatically. This can lead to the inadvertent starting of the connected loads.
• Do not operate any devices via the secure power socket-outlet that are dependent on a
stable electricity supply for their reliable operation.
• Ensure that the loads that are connected to the secure power socket-outlet do not require
more than 1,500 W.
Disconnection of the inverter due to insufficient irradiation
When the inverter disconnects itself due to insufficient irradiation, you have to switch back on
the socket-outlet as soon as irradiation is sufficient.