The + of the solar panel should be connected to the anode of the diode, and the cathode (+) should be connected to the + of the battery.

In other words, the arrow of the diode should point from the + of the solar array to the + of the battery.

the negative of the panel is connected to the negative of the battery.

put the + and – symbols on the battery and on the panel, it will help.

edit: I get the cathode and anode reversed, sorry. I just look at the arrow, it should point in the direction of conventional current.

edit2: re latest sketch, you have the battery reversed, with – terminal connected to the diode, should be the + terminal. Put the “+” and “–” symbols on the battery, it will help. battery – should be connected to array –

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