Is it legal to install solar panels outside my window?

Hi, I live in an HDB appartment, and I was wondering if it is legal to install photovoltaic panels outside of my window.

killer litter. You have to get a permit from HDB.

killer litter. You have to get a permit from HDB.

Oh ok.

Oh ok.

though that's said. What type of solar panel are you intending to put and size.

Oh nothing too huge, 200ft by 200ft.

though that's said. What type of solar panel are you intending to put and size.

I dont know man, I hav eyet to work out the details and specifics.

I dont know man, I hav eyet to work out the details and specifics.

from my course of studies. one that's mono crystalline, about 20 cm by 5cm produces around 4-5V and 1.5A under irradiance of 1000

efficiency will degrade as temp increases.