Since the power was restored to my area after the collapse of the electricity pylons in Pretoria, the voltage has been very high - sometimes as high as 254.8 V.

My Sunsynk is set to reject any voltages from the grid above 250 V with the result that I run almost exclusively on batteries and solar. This causes problems because my system was not designed for that.

What grid voltages can a Sunsynk inverter handle. Can I increase my maximum grid voltage to as high as 256 V ?

10 hours ago, Grootkoos said:

Since the power was restored to my area after the collapse of the electricity pylons in Pretoria, the voltage has been very high - sometimes as high as 254.8 V.

My Sunsynk is set to reject any voltages from the grid above 250 V with the result that I run almost exclusively on batteries and solar. This causes problems because my system was not designed for that.

What grid voltages can a Sunsynk inverter handle. Can I increase my maximum grid voltage to as high as 256 V ?

Yes you can set it to 256V.

The grid code for ZA to which grid tied inverters should conform is 260V and over that the inverters must switch off. 

Once all work is completed and higher loads on the network the grid voltage should come down again. 

In my area in KZN Midlands the voltage swings wildly. I have had highs up to 270V, but have Under & Over Voltage protection before the inverter which is set to a range of 180V to 266V. The SunSynk 8.8 kW inverter handles this range without problems. Currently as I type this, the Voltage is at 250.4V.

See Below:-

Edited April 12, 20231 yr by TimCam

Thanks. I have increased the max voltage to 256 v and everything works well now.