Photovoltaic grid-connected inverter user manual

What is a PV inverter manual?

The inverter is grid-connected, transformer-less, robust and of high conversion efficiency. This manual contains information about the inverter, which will provide guidelines on connecting the inverter into the PV power system and how to operate the inverter. The manual cannot include all information about the PV system.

How to connect multiple inverters in a PV power system?

Where there is only one inverter in the PV power system, connect “PE” cable to the ground. Where there are multiple inverters in the PV power system, connect “PE” cables of all inverters and mounting frame of PV arrays to the same copper bus bar. In this way, it will establish equipotential connection. EN 50178.

How do I connect an inverter to the grid?

Connect the inverter to the grid only after getting an approval from the local electric power company. Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with requirements, for which, refer to "10.1 Technical Data". Otherwise, contact the electric power company for help.

Can inverter be connected to PV modules?

Inverter CANNOT be connected to the PV modules, the positive or negative terminal of which needs to be grounded. Any other or additional usage is not permitted except the intended usage. Inverter may only accept PV modules with Protection Class II as its input. Inverter may only be connected to utility grid via distribution board.

What is the main circuit of a PV inverter?

Fig. 2-5 shows the main circuit of the inverter. The MPPT is utilized for DC input to ensure the maximum power from the PV array at different PV input conditions. The inversion circuit converts the DC power into AC power and feeds the AC power to the utility grid through the AC terminal.

How to maintain a PV inverter?

During the installation and operation of the inverter, please ensure that the positive or negative poles of PV strings do not short-circuit to the ground. To avoid the risk of electric shock, do not perform any other maintenance opera- tions beyond those described in this manual. If necessary, contact your distributor first.