Easysolar 12/1600/70 AC output pulses under load, Has latest firmware updates as of the 30/9/2019. when running a small loads 10 to 20 watts OK, when running more the 300 watts the AC output pulses between 230Vac to 200Vac and lower? load was a heat gun as an example.
Battery is 12v 800Ah AGM pack and fully charged to 100% SOC voltage does not dip down below
13v under the 300 watt load.
The main torroid transformer buzzes very badly.
This is a new install.