Behind the scenes of Primus Power’s battery lab

Take a peek behind the scenes of Primus Power’s battery lab in Hayward, Calif. The company makes a flow battery, which pumps a liquid electrolyte over an electrode to store energy. One day it could help power companies add solar and wind to the grid.

Biden, Chu: We’re at a crossroads for clean energy

It’s been hard to avoid the elephant in the room at the fourth annual National Clean Energy Summit. While the clean energy industry was eager to talk about the latest cleantech breakthroughs, the reality is that the industry is facing a difficult near-term funding future.

A battery startup flows toward launch

Startup EnerVault is getting closer to commercializing its flow battery, which uses large liquid tanks of chemicals to store energy. The Silicon Valley company will be building a demonstration project next year to help launch the technology into the market in 2013.

What you need to know about flow batteries

Flow batteries — big tanks of liquids that can store energy — are jockeying for a place in a growing energy storage market that will enable utilities to better manage the electric grid, provide back-up power and potentially work with the electric rates system.

Primus Power Raises $11M for Grid Flow Batteries

Large tanks filled with fluids could be the next low-cost way to provide energy storage for the power grid. A company called Primus Power is developing so-called flow batteries, and has now raised a round of $11 million from a group of venture capitalists.