SMA PV Offset Box Price

Can you provide me some important details and Installation Manual of SMA PV Offset Box (Accessories for PV Inverters)?

[Rajkumar Agarwal]

The SMA PV Offset Box applies a voltage against earth to PV modules and so disperses any power-reducing charges in the PV modules.
It is intended exclusively for in-parallel operation on inverters with a maximum DC voltage of 400 V to 1,000 V.

It can be operated with both a string inverter and with an inverter with several inputs. In an inverter with several inputs, the negative PV inputs must be internally bridged for the purpose.

Product Description

The SMA PV Offset Box dissipates power-reducing charges in PV modules.
It is connected in parallel with the inverter and applies a voltage against earth to PV modules.
It can apply a set voltage or automatically regulate its output voltage.
Depending on its configuration, it performs various functions.
Overnight, it can dissipate PV modules charges which have accumulated during the day.
In continuous operation, it regenerates PV modules whose efficiency was previously reduced.
It continually monitors the connection of the functional earthing (FE) and the insulation of the PV plant.
Prior to starting operation, it checks whether the PV strings are reverse poled or interrupted. Faults are displayed via LEDs.

Fault Indication Relay
An external fault indicator is connected via the fault indication relay in the SMA PV Offset Box.
Depending on the type of electrical connection, the fault indicator is activated either in the event of a disturbance or during fault-free operation of it.