Renewables

New solar flow battery with a 14.1 percent efficiency. Photo: David Tenenbaum, UW-Madison

CLICK HERE - STUDY - Chem - 14.1% Efficient Monolithically Integrated Solar Flow Battery

theverge.com - by Angela Chen - September 27, 2018

Solar energy is becoming more and more popular as prices drop, yet a home powered by the Sun isn’t free from the grid because solar panels don’t store energy for later. Now, researchers have refined a device that can both harvest and store solar energy, and they hope it will one day bring electricity to rural and underdeveloped areas.

The problem of energy storage has led to many creative solutions, like giant batteries. For a paper published today in the journal Chem, scientists trying to improve the solar cells themselves developed an integrated battery that works in three different ways.

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Figure 1. Average estimated annual residential rooftop PV market capacity potential from 2017 – 2030 (Source: NREL)

sepapower.org - by Jeffrey Cook - August 16, 2018

If the solar industry reaches this Department of Energy (DOE) target, it could dramatically alter the energy market and present a future where residential PV becomes a standard, cost-effective home installation, versus a luxury or long-term investment. A recent NREL report — Cost-Reduction Roadmap for Residential Solar Photovoltaics (PV), 2017-2030 — models a set of pathways that the industry could follow to realize this future. The analysis focuses on two key markets for residential PV cost reduction: installing PV at time of roof replacement and installing PV at time of new construction. These two market segments were selected because each offers significant cost reduction opportunities while representing a 30 gigawatt (GW) annual market nationwide (see Figure 1).

DC just proposed a first-of-its-kind regulatory body—and utilities should pay close attention.

CLICK HERE - Joint Release: Councilmembers Allen and Cheh to introduce bill modernizing DC’s energy grid

icf.com - by Steve Fine and Matt Robison - April 17, 2018

Two Washington, D.C. City Council members proposed a remarkable change in utility regulation last week. Mary Cheh and Charles Allen introduced a bill to create a Distributed Energy Resource Authority (DER Authority): a first-of-its-kind regulatory body that would be empowered to undertake traditional utility planning functions, and with a specific mandate to assess any proposed utility grid investment greater than $25 million and open it up to competitive bids.

Microgrid at Princeton University

utilitydive.com - March 20, 2018

The National Academy of Sciences defines “resilience” as the ability to prepare and plan for, absorb, recover from, and more successfully adapt to adverse events.  Since the September 2017 DOE NOPR to FERC, the energy industry has been working overtime to better define resilience.  FERC unanimously set aside the “90 days on-site fuel storage” provision espoused by DOE and opened a new docket (AD18-7) to more fully examine the current state of grid resiliency, asking the nation’s seven RTO’s and ISO’s to provide their definition of resiliency relative to the bulk power system by March 9.  Those ISO/RTO comments reflected regional variances as expected while sharing a common thread of the paradigm shift underway from central station power plants to more distributed generation . . .