Photovoltaic inverter return box

What is a PV offset box?

In PV plants with transformerless inverters which, due to their design principle, are significantly less expensive and more efficient, the required effect can be achieved using the PV Offset Box. The PV Offset Box exploits the fact that the PID effect is reversible and progresses relatively slowly.

Can the SMA PV offset box be combined with any inverter?

In principle, the SMA PV Offset Box can be combined with any inverter. However, in order to connect the SMA PV Offset Box to a PV plant, approval by both the manufacturer of the PV modules and the inverter manufacturer is required. If necessary, observe additional requirements by the manufacturers.

How does a PV inverter work?

It drives a corresponding direct current which the inverter converts into grid-compliant alternating current. The earthing of the PV array, its potential, is prescribed by the potential of the connected electricity grid and the design of the inverter.

Can transformerless inverters prevent negative earthing of PV modules?

In addition to negative earthing of the PV array, SMA Solar Technology AG now offers a simple technical solution to prevent this reduction in power of PV modules reliably, also when using transformerless inverters.

Why should you choose LS solar combiner boxes?

As developed based on customers’ needs, LS’s PV combiner boxes provide optimum connections and protections from the modules to the inverters. High reliability and safety. Optimized for solar power plants. The enclosure was made of metal (SS304) to increase durability. It is designed based on the latest IEC standards and has been certified as CB.

Do PV arrays need re-combiners?

Depending on the needs of the site, a given PV array can use any combination of junction boxes, pass through boxes, and combiner boxes. Beyond combiner boxes, some very large arrays require re-combiners. These are essentially “combiners of combiners.”