36 SB3-5TL-21-BE-en-10 Operating Manual
7 Initial Start-Up SMA Solar Technology AG
7.4 Commissioning the Inverter for the First Time
When commissioning the inverter for the first time, proceed as follows.
Requirements:
☐ The inverter must be correctly mounted.
☐ The circuit breaker must be correctly rated and mounted.
☐ All cables must be correctly connected.
☐ Unused DC inputs must be sealed using the corresponding DC connectors and sealing plugs.
☐ The country data set must be configured according to the country or purpose.
Procedure:
1. Mount the lower enclosure lid:
• Place the lower enclosure lid on the enclosure and secure with screw 6.
2. If an ESS is used, the ESS has to be plugged in firmly. The ESS must be aligned parallel to and
flush with the enclosure.
3. Attach the enclosed warning label "Risk of burns from electric arc" so that it is clearly visible on
the disconnection device on the AC side.
4. Switch on the circuit breaker.
5. If an external DC load-break switch is installed, switch it on.
6. If the multi-function relay is used, switch on the load supply voltage, if necessary.
☑ The start-up phase is beginning.
• Then tighten all six screws with an Allen key
(AF 3) in the order 1 to 6 (torque: 2 Nm).
Currents in the DC cabling after connecting the ESS
After connecting the ESS, DC currents may occur in the DC cabling, even when there is
no AC-side supply. This is not an error but normal behavior of the inverter when in
operation.
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