explain i. total daily system energy requirement ii. days of autonomy as used when sizing solar electrical installation

i. Total daily system energy requirement:

The total daily system energy requirement refers to the amount of energy that a solar electric system needs to produce on a daily basis in order to meet the energy needs of the end-use load. This includes the energy required for lighting, heating, cooling, and other electrical loads. To determine the total daily system energy requirement, it is necessary to first assess the energy needs of the end-use loads and then calculate the size of the solar electric system needed to meet those needs.

ii. Days of autonomy:

Days of autonomy refers to the number of days that a solar electric system can operate without being recharged or supplemented with energy from an external source. This is an important consideration when sizing a solar electric system, as it determines the amount of energy storage capacity that is needed to ensure that the system can meet the energy needs of the end-use load over an extended period of time. The number of days of autonomy that a solar electric system requires will depend on the size of the system and the energy needs of the end-use load.