Report: Public Rooftop Revolution

BY JOHN FARRELL | DATE: 1 JUN 2015   There are a lot of stories on residential rooftop solar but few if any on what cities are doing to make themselves energy self-reliant by using their own buildings and lands to generate power. In Public Rooftop Revolution, ILSR estimates that mid-sized cities could install as much as 5,000 megawatts of solar—as much as one-quarter of all …

Original Nations add solar for a long-term revenue stream

Solar is the ‘new casinos,’ offering long-term steady income Renewables targeted as a green path to stimulate economies Bloomberg, July 11, 2019 Dozens of new solar and wind projects are sprouting up on tribal lands across the U.S.  In the fall, Wirsol Solar AG expects to start building a 110-megawatt solar project on the Pine Ridge Reservation in South Dakota. And last …

Giant batteries and cheap solar power are shoving fossil fuels off the grid: Prices for utility-scale lithium-ion batteries have fallen by 35% in just the past 18 months

Giant batteries and cheap solar power are shoving fossil fuels off the grid, By Robert F. Service, Jul. 11, 2019 , Science Mag This month, officials in Los Angeles, California, are expected to approve a deal that would make solar power cheaper than ever while also addressing its chief flaw: It works only when the sun shines. The deal calls for …

Los Angeles Readies Nation’s Lowest Cost PV Project Yet at Less Than 2 Cents/kWh

Los Angeles’ municipal utility (LADWP) is readying a 25-year power purchase agreement for 400 MWac of solar power at 1.997¢/kWh along with 200 MW/800 MWh of energy storage at 1.3¢/kWh. There is no price escalator and the solar portion is a record low price for the United States. It even beats out the current US pricing leader – 8minute’s 2.375¢/kWh …

CCAs helping California get to 60% renewables by 2030 in the power sector and zero-emissions economy-wide by 2045

Community Choice Aggregators say they will use resource diversity, distributed energy resources and load management to lead California beyond its 2030 renewables goals. CCAs face unique challenges. Their lack of established credit may prevent new procurement, some power sector stakeholders told Utility Dive. CCAs responded that they will use resource diversity, distributed energy resources (DER), and load management to lead …

Natural Gas Beat Coal in the US. Now Renewables and Storage Are Beating Natural Gas

2019. Coal, the long-reigning king of the U.S. power sector, was officially dethroned by cheap, abundant natural gas in 2016. In 2018, natural gas fueled more than 60 percent of newly installed electric-generating capacity and accounted for 35 percent of total U.S. electricity generation. Now, even Indiana is rejecting new gas plants and Los Angeles has struck a deal on the largest and …

MIT Aerogel Generates Passive Heat From Sunlight

July 8th, 2019 by Steve Hanley  It’s below freezing on a rooftop in Cambridge, Massachusetts, but inside a device created by researchers at MIT, the temperature is 220º C. There are no moving parts, compressors, or vacuum pumps involved. Just sunlight and a special aerogel it has taken researchers at MIT 4 years to perfect, aided by grants from the Department of …

Nebraska tribe’s latest energy project: reclaimed solar thermal heaters

In addition to this Nebraska example, solar thermal heating technology is alive and well in Minnesota, where the Rural Renewable Energy Alliance (RREAL) designed its own heater and for years manufactured and installed them at no cost to low-income households. RREAL has shifted its focus to community solar and licensed the design to the White Earth Nation in northwest Minnesota. The tribe …

“Vision and Claims for 100% renewable electricity supply”

17.06.2019 ETIP PV publishes the White Paper Solar PV has recently become the lowest cost source of electricity in most parts of the world Solar PV can be used in all geographic regions and its generating capacity can be installed rapidly and scaled up modularly Solar PV can drastically reduce GHG emissions from the power sector and in other sectors …

Curtailment: In California, clean energy “overbuild” doesn’t have to be a dirty word

Also, EVs can be managed to charge coincident to renewable energy production (during daytime hours) or to a “flatter”, less peaky profile, and then fewer energy storage systems may be needed. High-penetration EV can take advantage of the electricity being generated during the middle of the day through workplace and public charging. Managed charging, in which a utility incentivizes charging …