Fluence Energy (FLNC) said late Tuesday it priced a private placement of $350 million of 2.25% convertible senior notes due 2030.

The initial purchasers have been granted a 13-day option to purchase up to $50 million in additional notes.

The notes will be convertible at an initial rate of about $21.35 per share.

Net proceeds will be used for working capital, upgrading the company's production lines and for general corporate purposes, the company said.

The offering, which has been upsized from $300 million, is expected to settle on Thursday.