def plot_hsu(hst, models, max_speed, pressure_charge, max_pressure):
    """
    For the given HST computes the sizes, efficiencies and plots the efficiency map.

    Returns:
    ---
    fig: plotly figure object
    """
    hst.compute_sizes()
    hst.compute_speed_limit(models['pump_speed'])
    hst.add_no_load((1800, 140), (2025, 180))
    return hst.plot_eff_maps(max_speed,
                             max_pressure,
                             pressure_charge=pressure_charge,
                             show_figure=False,
                             save_figure=False)