Sergey Kandaurov

Yes, I set to to 60 Hz and it stays 60. I was thinking that maybe it does not like something about line power quality, but it does not explain why everything goes to normal after restart.

I just installed Anern AN-SCI02-Azure-2400 inverter, which looks like Voltronic clone. It's used primarily as a battery charger from solar and grid, so another inverter can provide power to a house with stable voltage and zero switch time in case of blackout. The problem is that after a blackout, the inverter fails to detect grid. The grid line icon blinks for a fraction of second, but inverter never goes to line mode. The same is when inverter is on - it just continues to work in a battery mode, even though AC power is present. Restarting (turning off inverter and disconnecting solar and grid power) helps. Until next blackout. Interesting, the the screen stays on displaying just the battery symbol when lice AC (undented) is present, but turns the screen off when line AC is off. The seller was not very helpful, just said "no fault on your video, you can connect load" and stopped replying. I am about to return the inverter and request refund, but before doing it I'd like to make sure I am not missing anything simple. I tried different settings with no change in behavior. Current settings: Program 01 - SUB Program 03 - APL Program 16 - SNU Interesting that WatchPower sometimes shows 15-45 V and 30-40 Hz AC input before restart. After restart it shows ~210 V and ~60 Hz as it should be. Here is data from WatchPower. The blackout happened at 09:51, power was restore around 10:28, but the inverter detected AC line only when I manually restarted it at 12:30.