Once you decide to go for solar installation on your rooftop, you would need to decide the type of solar rooftop PV system that you want to install. It could be off-grid roof-top or an on-grid solar rooftop PV solar system. For more details on off-grid and on-grid, please refer http://ecosoch.com/power/
For a standalone off-grid solar system, load energy consumption is a critical parameter in designing a PV System required. It’s compulsory that we do accurate load assessment so as to design the exact size and number of solar panels, battery and inverter.
If it’s on-grid solar system, PV systems may be designed to satisfy a portion of existing site electricity loads. For these type of systems, the limiting factor is going to be the shade free south facing rooftop area available to mount solar panels.
If its an existing building, one way to assess Energy Requirements of a building is to look at it’s electricity bill and get the number of Units of Energy Consumption during a month and divide it by number of days in a month to get your per day’s consumption. This gives the total energy consumption.
But what exactly are Power, Energy and a Unit (measured in kWh)? An understanding of power and energy fundamentals is essential for better assessment of your PV system requirements.