Copper started shipping its award-winning induction range last fall, officially launching a new category of battery-equipped home appliances. The internal battery not only gives a serious performance boost, but also supports the grid and avoids expensive electrical upgrades to buildings. Now, Copper is closing a $28 million Series A financing to expand its operations into new markets and products.

The financing, a combination of equity and debt, was led by Prelude Ventures, which invests in startups with the greatest potential to mitigate climate change. The round also includes Building Ventures, as well as existing investors Voyager, Collaborative Fund, Climactic, Designer Fund, Necessary Ventures, Leap Forward Ventures, and Climate Capital.