Top: LAP spacecraft potential (blue circles) and MIP electron density (red dots) during a rotation of the Rosetta solar array of 60 deg from the sun, for which two dashed lines indicate the start (red) and end (blue) of the test. Bottom: spacecraft potential result at various γ_ph and V_B from an adaptation of our solar panel model to a Rosetta spacecraft box with ten panels, for which n_ew = 50⁻³, T_ew = 5 eV, at 3.4 AU with no cold electrons present.