Photovoltaic inverter DC protection

Does a PV inverter need surge protection?

The inverter is typically the most expensive component within a PV system, making it essential to properly select and install the correct surge protection device (SPD) on both the ac and dc lines. The closer the strike is to the inverter, the more damaged the inverter will be.

How to install a surge protection device in a photovoltaic system?

In a photovoltaic system, the placement and quantity of Surge Protective Devices (SPDs) on the DC side are determined by the cable lengths between the solar panels and the inverter. If the cable length is under 10 meters, it is sufficient to install an SPD near the inverter.

How do I protect my inverter surge protection system?

Prioritize adhering to industry standards and utilizing approved hardware for connections to maximize the lifespan of your inverter surge protection system. Surge protective devices (SPDs) have been becoming the most accepted and most effective electric device in protecting surge events in industrial use.

What is a DC inverter?

An inverter, or DC inverter, or solar inverter, is an electronic device that converts direct power to alternating power, which then can be supplied to multiple end uses. The utilization of inverters contributes to promoting the sustainability of green power and alleviating the pressure of power supply.

Why are solar PV inverters costly?

Inverters are expensive, but for industrial applications, an even more expensive failure is the cost of downtime. When lightning strikes a solar PV system, it causes an induced transient current and voltage within the solar PV system wire loops.

Why is surge protection important for inverter systems?

Improper surge protection could lead to inverter malfunctions, system downtime, and even safety hazards. Before we hop into surge protection measures section for inverters, it is worth introducing some of the most common surge sources associated with inverter systems.