Solar Panels

Solar Panels convert SUNLIGHT into ELECTRICITY. 

The electricity from Solar Panels is in direct current (DC) form. For use in the home this has to be converted into alternating current (AC). This is done using an Inverter.

Any electricity generated by the panels which is in excess of the household need can be either:

               1. Exported to the grid for payment.

OR

              2. Stored in a battery for later use. A Hybrid Inverter is required in this case.

Alternatively it can be diverted to heat water which you may or may not use.

System Size and performance.

System size or potential output is quoted in kiloWatts peak (kWp). This is the maximum out it will achieve in near ideal conditions. Systems will get close to the peak output around midday on sunny days in the summer months. Different panels have different output so the number of panels does not necessarily indicate system size.

Typical system sizes vary from 3kWp to 10kWp, though larger or small systems have been installed.

Irrespective of the size of the system installed the payback period is typically 6 to 8 years, depending on a number of factors including:

- Orientation of the panels, with South usually being best. East/ West might achieve 90% of best case.

- Household annual usage which can vary from 4,000 units to 12,000 units per annum. A unit is 1 kW of electricity for 1 hour.

- Energy prices and smart price plans.

- System setup.

Where to go for advice?

The Irish Solar Owners facebook page is a goldmine of information and advice. It has over 50,000 members from all around the country who are happy to share their experiences. It is very well run, and includes members with very high levels of expertise who are very helpful.