They can. But as far as I understood the subsidy scheme to support the sale of solar panels does not include imports, however stupid this is since all solar panels are imported.There is no Irish manufacturer.Try this page for a huge range on (special)offers :
http://www.top50-solar.de/
Click the "welcome" box for the English version if you're not automatically directed.
P.S. I did the check on the solarserver myself, here is the first special offer that popped up for € 2,560-.
This price includes 3 panels with a total of 6.1m2, 300l tank, control unit, anti freeze,expansion barrel and mounting material. It does include the Vat as well, but neither the transport to Ireland nor the installation on the roof. See yourself at [broken link removed] .If you were living in Germany their subsidies would bring down the price to €1,972-, again without the installation.
The German subsidy is €84.- per started m2.
Europes largest manufacturer of solar panels (flat collectors) , an Austrian company, claims that the panel costs on their own are only 8% of the total solar system costs, most of the total price is profit. For the traders, for the installers.So if you're planning to go to the continent with a delivery van it might be worth to load it with solar panels instead of beer (smiley) before coming back, it would be healthier and more profitable......
As far as I understood Turkey and China have even better offers, but I haven't checked their pages.
P.S. Another here, the same size and specs, for € 2499.-:
http://www.solarheizungsshop.de/