The problem of the determination of the photovoltaic module (converter) regime in the normalized or relative form is examined. The parameters of characteristic regimes, such as the maximum power regime, short circuit, open circuit, are considered as the base values. Utilized linear-hyperbolic approximation of the current-voltage characteristic gives the interpretation of the deviation of regime from the maximum power regime as the rotation of a radius-vector in the projective coordinate system. The obtained relationships make it possible to compare the effectiveness of the current regimes of photovoltaic converters with the different parameters.