In the northern hemisphere, large south-facing windows receive more total sunlight during the day and would be a part of a solar heating system.

Passive solar heating system

Explanation:

The goal of passive solar heating systems usually refers to the system in which the energy provided by the sun is used for heating and cooling of the living places in a house.

When sunlight falls on the house, the building elements capture the heat energy of the sun and it later releases back this heat when the sun is not there. The main objective of this system is to regulate the room temperature. It is comprised of two main elements, one is the glasses that face towards the south and a thermal mass that is used for heat absorption, storing and distribution of heat.

i was actually wondering the same thing but i've tried and i don't think you can. i think once you set it up then that's what it stays as. sorry ; -;