How many Solar Panels do I need in Ireland?

To calculate how many Grant Solar Collectors you would need in Ireland see the table below:

Table to calculate the number of collectors required:
Direction of the RoofSolar Radiation KWH/Year3 PERSON HOUSEHOLD4 PERSON HOUSEHOLD5 PERSON HOUSEHOLD6 PERSON HOUSEHOLD
South900—10002223
South1000—11002222
South1100—12002222
South West / South East900—10002233
South West / South East1000—11002223
South West / South East1100—12002222
West900—10002334
West1000—11002233
West1100—12002223
East900—10002334
East1000—11002333
East1100—12002223