Between 12 h and 13 h, a new wire has been attached to the PV panel, a with a soldered connection, hidden from precipitations. No galvanic voltage should contribute to the PV one on rainy nights any more (Milan Wudia worked on this with me). Moreover, due to a record atmospheric pressure since August (1040 hPa at sea level), a standard pressure curve would be above the graph; I've chosen a solution, that values over 1036 hPa are mirrored down again at this line (dotted black line indicates that). This option has been added on Jan 2.