Trombe wall

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A Trombe wall is a massive Equator-facing wall that is painted dark color in order to absorb thermal energy from incident sunlight and covered with a glass on the outside with an insulating air-gap between the wall and the glaze.

Pros :

The most flexible solar option.

Work in mild climates as well as in extreme cold.

They can even be used to cool a building instead of heating it.

They stop sun drenching.

Reducing glare.

Cons :

Costly to install

It has to be carefully designed

Ensures that the thermal mass wall of suitable thickness to absorb the excess heat.