Flowing from Framingham

A typical flow battery has two tanks of liquids that are pumped past a membrane held between two electrodes.

 From Robert Whitcomb’s “Digital Diary,’’ in GoLocal24.com

We in the Northeast tend to be more enthusiastic about renewable energy than most Americans, in part because we tend to be more educated, including about global warming, and also because there’s no fossil fuel to be extracted in our region. But a big hurdle is boosting the capacity to store energy from solar- and wind-power facilities.

And so it was good to hear that Framingham, Mass.-based Ameresco has completed Phase 1 of Defense Department-funded research on flow battery technology as an alternative to lithium ion batteries, which degrade over time. The hope is that flow batteries may be more efficient than lithium ones and thus reduce the need for, say, diesel generators (with their pollution) used in microgrids. These new batteries might also cut utility bills.