Lebanon's electricity grid is back online after the army supplied fuel to two key power stations that had run out, a minister says, ending almost a day of total blackout.

The Deir Ammar and Zahrani plants ground to a halt Saturday, causing the state electricity network to collapse completely for the second time this month.

The Mediterranean country is battling economic turmoil, and the cash-strapped state has in recent months struggled to import enough fuel oil for electricity production.

Most Lebanese saw no major change to their daily lives on Saturday, as the state has been barely providing one to two hours of power a day for months.

Energy Minister Walid Fayad says that the grid is back up and running.

"The network is back to normal, as it was before the gasoil ran out at Deir Ammar and Zahrani," he says in a statement, implying production will revert to the previous few hours a day.

He thanks the army for handing over 6,000 kiloliters of gas oil, half of which he says went to each power station.