SMA Solar Technology AG 3 Product Description
Installation Manual SB30-50TL-21-IA-en-21 19
3.5 Electronic Solar Switch
The ESS is an optional DC load disconnect unit. The ESS prevents the formation of electric arcs when
the DC connectors are removed.
When plugged in, the ESS forms a conductive link between the PV array and the inverter. Removing
the ESS interrupts the electric circuit and allows you to disconnect the DC connectors from the inverter
safely.
Item Description Explanation
A Plug ‒
B Safety precautions
sticker
• Never operate the inverter without the lower
enclosure lid in place.
• Observe all documentation that accompanies the
inverter.
C ESS sticker • If the ESS is plugged in, the DC electric circuit
remains closed.
• To interrupt the DC electric circuit, you first need to
perform steps 1 and 2.
• Remove the ESS.
• Remove all DC connectors.
To Next Page
Loading...
