Feb 14 (Reuters) - Plug Power said on Wednesday it will start taking cost-cutting measures and reduce its workforce as the hydrogen fuel cell firm faces liquidity challenges.

Shares up 5% at $4.38 in premarket trade.

Plug Power has been facing liquidity issues amid supply challenges in the liquid hydrogen market in North America, and had raised going concern doubts in November. It also planned a $1 billion equity raise last month.

The company expects to cut its annual operational expenses by more than $75 million and will bear a one-time implementation cost of $15 million.

"The decision is made in the interest of preserving the company's agility and innovation capacity," the company said.

(Reporting by Tanay Dhumal in Bengaluru; Editing by Krishna Chandra Eluri)