High voltage grid-connected inverter in Sydney Australia

How does a solar inverter respond to high grid voltages?

Before the voltage is so high it disconnects, your inverter may also reduce its power output in response to high grid voltages. If your inverter sees a grid voltage that is too high for too long, Australian Standards mandate it disconnects from the grid.

How do grid-connected inverters reduce grid voltages?

To help reduce grid voltages, all grid-connected inverters must now manage generation based on voltage. Here, an inverter shuts down eight times between 12.30 pm and 3.30 pm due to high voltages—note where power (the green line) falls to zero. But the 6.3 kW system (5kW inverter) still generated over 30 kWh for this day in late November 2018.

What is the grid voltage for a 60038 inverter?

The grid voltage Australian standard AS 60038 is 230V +10% -6%, which is a range of 216V to 253V. The Australian standard for your inverter instructs that it must disconnect from the grid if voltage exceeds 255V for 10 minutes or exceeds 260V for any amount of time.

What happens if a solar inverter is too high?

If your inverter sees a grid voltage that is too high for too long, Australian Standards mandate it disconnects from the grid. Before the voltage is so high it disconnects, your inverter may also reduce its power output in response to high grid voltages.

Why does an inverter push power out to the grid?

An inverter pushes power out to the grid because it runs at a higher voltage than the grid. Current flows from a point of higher voltage towards a point of lower voltage, never the other way around.

Can inverters increase voltage if grid voltage is too high?

In 2016, significant changes to AS 4777.2 occurred and a 255V output was set on inverters. Before this change, inverters were able to increase voltage if the grid voltage was too high.