It cannot be used on a cloudy day

It cannot used for roasting

It's heating energy is lower than normal cooker

advantages of solar cooker are:

1. there is no cost of fuel.

2. it is environment friendly and there is no residue like ash etc.

3. cooking is hygienic and nutritious.

disadvantages of solar cooker are:

1. cooking is slow.

2. it cannot be used all times.

3. a solar cooker can perform only limited functions.