Saving you (((@house-type * (1 + ((@occupants - 2) * 0.08)) * 900 * @Roof-direction * @shading) * (0.30 + (@EV * 0.10)) * 0.24) + ((@house-type * (1 + ((@occupants - 2) * 0.08)) * 900 * @Roof-direction * @shading) * (1 - (0.30 + (@EV * 0.10))) * 0.15) ) / (@Elec-bill * 12) * 100% of your total electricity bill!