Photo voltaic is the term used for generating electricity from Solar energy. Photo voltaic cells are mounted on panels similar solar panels used for heating water. See also, Generating your own electricity
Ireland receives adequate solar radiation to make this a viable means of generating renewable electricity. There are massive benefits to generating electricity by this means. For example say that you already heat your house by means of a Heat Pump, then you can avail of free electricity to operate your heat pump during cold weather. During very cold weather the sky is often very clear thus providing much ample quantities of solar radiation during daylight hours for your photo voltaic cells.