The power grid is to be upgraded over the next decade to accommodate 80 per cent renewable energy.
Eirgrid is expecting demand to grow by up to 50 per cent due to industry growth and the electrification of vehicles and home heating.
The one billion euro plan involves 40 infrastructure projects - with some new power lines required, which may include pylons.
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Business correspondent Vincent Wall says four areas have been earmarked so far:
