Factors to consider when choosing how many solar panels you need:
There are many factors to take into consideration when deciding how many solar panels to get installed on your home, based on your energy consumption and budget.
The biggest thing which will affect how many solar panels you need is how much electricity you consume, and how you use it. There’s no point in getting too small a solar PV system that won’t put a dent in your electricity bill.
How much sunlight you get in your area is also an important factor in what size of a system is needed. In Ireland the south and southeast get the most sunshine throughout the year, while the northwest gets the least.
If there is less sunlight in your area, more solar panels will be required to generate the same amount of electricity as elsewhere.
Solar Panel Size and Rating
Solar panels vary in their power output based on their size, the cell efficiency, and the materials which the panels are made of. Monocrystalline or Polycrystalline silicon panels, or Thin-Film Panels will all have different levels of efficiency and cost.
All of the above factors must be considered in light of the budget you have for installing a solar PV system on your home.