I have connected 4 x 175W Victron solar panels in series to a SmartMppt 100/50 that charges a Victron 160Ah Lithium battery. The global charge works perfectly, but the accompanying trend screenshot shows that every x time the PV voltage and PV current briefly drops and rises again in full sunshine. The event intervals always have the same time span, which (I think) means that a wiring error can actually be ruled out. The last dropdown on the right side of the screenshot means that I've switch off the Mppt. Does anyone have an idea what's going on here on the screenshot?
