With the inverter of my solar system on standby at night, it typically consumes a steady 2W of power.
I’ve noticed that for the last few nights my inverter seems to be acting up, where it would occasionally cycle (~1-3 second period) between consumption (up to ~-15W) and production (up to ~15W) for long stretches. Then it’s quite again for a while. This is in the middle of the night. No sunlight, no moonlight.
Have a look at the picture from the last two nights. The green arrows point at three such periods.
I first noticed it on the main “Now” bubble screen. where the solar bubble would constantly appear and disappear when it’s dark outside…
Looking back at the history, this started a few days ago. Was always steady all night before.
I worry that there might be something faulty. This is a Xantrex converter from 2009.
Anyone seen something similar? Anything I could test?