F20 DC overcurrent
Last couple of days I’ve been getting an F20 fault. It appears to be triggered when the PV has charged the battery to 100% and the mode is switching from PV supplying load + battery charging to load + export. Blip seems to last a few seconds - where the inverter supplies all power from grid - then it all works normally again. Inverter is a 3.6kW hybrid, with a 10k lithium battery and a 4.6kW PV array across two equal strings. PV load has maxed out at around 2kw the last few days so should be well within limits.
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To add. Has all worked fine for 8 months including through periods of high PV generation.