battery storage – Enviro Updates

Ivan Penn, THE NEW YORK TIMES

When demand exceeded supply in a recent heat wave, electricity stored at businesses and even homes was called into service. With proper management, batteries could have made up for an offline gas plant.

Last month as a heat wave slammed California, state regulators sent an email to a group of energy executives pleading for help. “Please consider this an urgent inquiry on behalf of the state,” the message said.

The manager of the state’s grid was struggling to increase the supply of electricity because power plants had unexpectedly shut down and demand was surging. The imbalance was forcing officials to order rolling blackouts across the state for the first time in nearly two decades.

What was unusual about the emails was whom they were sent to: people who managed thousands of batteries installed at utilities, businesses, government facilities and even homes. California officials were seeking the energy stored in those machines to help bail out a poorly managed grid and reduce the need for blackouts.

Many energy experts have predicted that batteries could turn homes and businesses into mini-power plants that are able to play a critical role in the electricity system. They could soak up excess power from solar panels and wind turbines and provide electricity in the evenings when the sun went down or after wildfires and hurricanes, which have grown more devastating because of climate change. Over the next decade, the argument went, large rows of batteries owned by utilities could start replacing power plants fueled by natural gas.

But that day appears to be closer than earlier thought, at least in California, which leads the country in energy storage. During the state’s recent electricity crisis, more than 30,000 batteries supplied as much power as a midsize natural gas plant. And experts say the machines, which range in size from large wall-mounted televisions to shipping containers, will become even more important because utilities, businesses and homeowners are investing billions of dollars in such devices.

Martin Espinoza, THE PRESS DEMOCRAT

When Rick Mead and Mark Marion finally flip the switch on the solar array atop their rural Sebastopol home, their $300 monthly electric bill will drop to $25 — the cost of maintaining a connection to PG&E’s power grid.

A 30% federal tax credit, which declines next year to 26%, on the cost of the solar energy system made the investment a good idea, Mead said.

“It no longer made sense not to go with solar,” he said. “PG&E rates will increase in the coming years — in the long run, the estimate is that our system will pay for itself in seven years.”

But it wasn’t just economics that motivated Mead and Marion. The idea of powering their home on renewable energy was the right thing to do, Mead said, at a time when many people are troubled by the fallout of climate change, such as increasingly deadly and destructive wildfires in Northern California.

“It’s a great investment in ourselves, our community and our planet,” he said.

Jeff Mathias, owner and chief financial officer of Sebastopol-based Synergy Solar, which installed Mead and Marion’s solar system, said recent wildfires — which many argue have been exacerbated and supercharged by climate change — are bringing more attention to rooftop solar systems.

The increasing threat of fires and public safety efforts to prevent them that include potential blackouts are bringing more attention to residential solar energy systems that are environmentally friendly. Until recently, solar power mainly had been used by home and business owners to reduce electric bills.

A big concern among Sonoma County residents is a PG&E wildfire-prevention measure to temporarily turn off power to certain customers and entire communities, if necessary, threatened by a blaze, Mathias said.

“When power goes out, the system disconnects from PG&E and allows that home to continue to operate,” Mathias said.

Environmental Center of Sonoma County

Tag: battery storage

Its electric grid under strain, California turns to batteries

More residents turn to solar power as North Coast faces growing threat of wildfires, blackouts