Cavan's Kingspan says it aims to only acquire zero emission vehicles by 2025.
The company has taken delivery of three new electric vehicles into its fleet this week.
It now takes its fleet of electric vehicles to 69 and it says from 2025 it won't acquire any petrol or diesel fuelled vehicles.
As part of its plans, Kingspan is installing new charging points at its headquarters in Kingscourt with the new unit recently granted planning permission by Cavan County Council.