US-based smart grid company Silver Spring Networks raises debt and options, alongside a strategic alliance with Hitachi, as it prepares its flotation.

Smart grid technology company Silver Spring Networks has raised $30m in debt and options, after it signed a strategic partnership with Hitachi.

The company announced the debt and option fundraising in a Securities and Exchange Commission filing on Friday. A spokeswoman confirmed the funds were from Hitachi.

This filing comes after Silver Spring said in an update to its S-1 filing last month: "In February 2012, we entered into a note purchase agreement with Hitachi and issued…