A once-off additional fuel allowance payment of €300 is also due to be paid from the 20th of November.
The Society of Saint Vincent de Paul says many families are still very worried about their energy bills, despite price reductions from this month.
450-euro in electricity credits were announced as part of last month's budget, which will apply to bills between the start of December and the end of March next year.
A once-off additional fuel allowance payment of €300 is also due to be paid from the 20th of November.
Customers of Electric Ireland, SSE Airtricity, and PrePay Power will see price cuts on their bills from today, with Bord Gais Energy and Flogas following suit next week.

Speculation Grows Over Micheál Martin's Future As Fianna Fáil Leader
Higher Fuel Bills This Month As Petrol And Diesel Prices Edge Up Again
Man (20s) Seriously Injured During Alleged Assault In Kildare Town Was Found Unresponsive At 3.15 This Morning
Tóibín: “ Extreme” Views Highlighted In Secret WhatsApp Groups Will Not Be Tolerated, As He Points To Diversity In Aontú
Gardaí Investigate Alleged Attack In Kildare Town
“And My Daughter Won’t Like Brown People”: Aontú Fires Kildare Youth Leader Over Racist Messages
Michael D. Higgins Congratulates Catherine Connolly Following Decisive Kildare Vote
With Kildare Boxes Opened And Postal Votes Being Counted, Connolly’s Path To Áras An Uachtaráin Seems Certain