Ring inverter anti-DC saturation

What is inverter saturation?

Inverter saturation, commonly referred to as “clipping”, occurs when the DC power from the PV array exceeds the maximum input level for the inverter. In response to this condition, the inverter typically adjusts DC voltage to reduce the DC power. This is done by increasing voltage above the MPP voltage, thus reducing DC current.

How do inverters reduce DC power?

In response to this condition, the inverter typically adjusts DC voltage to reduce the DC power. This is done by increasing voltage above the MPP voltage, thus reducing DC current. Most, but not all inverters self-limit.

What is inverter clipping?

Inverter clipping, or “inverter saturation,” occurs when DC power from a PV array exceeds an inverter’s maximum input rating. The inverter may adjust the DC voltage to reduce input power, increasing voltage and reducing DC current. Alternatively, the inverter may restrict or throttle the inverter’s AC output.

Why do inverters clip?

The inverter may adjust the DC voltage to reduce input power, increasing voltage and reducing DC current. Alternatively, the inverter may restrict or throttle the inverter’s AC output. Inverter clipping is typically seen in PV systems that have high — for example, greater than 1.4:1 — DC/AC ratios. Why does it matter?

Are ring inverters reliable?

Ring's inverters provide a reliable source of mains power while working remotely. The PowerSourcePro and PowerSourcePure range of commercial grade inverters provide an AC mains power source from the vehicle battery, allowing operation of mains powered electrical equipment on the move.

Do all inverters accept higher DC/AC ratios?

Fair warning: Not all inverters can accept higher DC/AC ratios! If the inverter clips output power on the AC side, field experience shows that internal AC components will wear out faster. But overloading the DC side of these inverters may void the warranty, so installers must check for a maximum DC/AC ratio on the manufacturer’s datasheet.