From reading what others have done, I think once you place your order, fill out a few application forms and your EV grant is approved, the dealer will get a SEAI reference number for you. You then contact the ESB with this SEAI reference number to organise the chargepoint to be installed. There is 5k in the SEI grant off the 330e and a further 2.5k in VRT rebate. I think BMW were giving another 4k off recently in the form of a contribution if you took their finance/PCP offer or if you bought one with no trade-in.

More information here around the grant:
http://www.seai.ie/Grants/Electric_V..._Grant_Scheme/