A giant model of the entire US electricity sector which captures distributed energy resource (DER) potential has been getting a lot of attention. It estimates that distributed solar and storage can save $473bn in system-wide costs when deployed at scale (enough to power more than 25% of US homes). Rooftop solar is definitely much more expensive than grid generation, but its location (on your own roof) avoids a range of costly transmission and … [Read more...]
California: Designing electricity rates that are fair and encourage EV and Heat Pump take-up
Electricity prices in California are not fair and not good for incentivising electrification, says James Sallee at the Energy Institute at Haas, because of the way people are being billed. There is no doubt that electrification (grid upgrades, etc.) and climate mitigation (including controlling Californiaâs wildfires caused by power cable failures) must add to the cost of transition. But Californians can now find themselves paying up to twice the … [Read more...]
A marketplace for energy data will enable Europeâs grid expansion
The growth of the decentralisation of energy generation and storage combined with the digitalisation of the metrics of supply and demand is pointing towards a marketplace for energy data, explain Veronika SpurnĂĄ and Helena Uhde at the EU-China Energy Cooperation Platform. Such a marketplace will monetise the data itself, in recognition of its vital role in enabling the intelligent distribution of energy and investment. There will also be a place … [Read more...]
Coal regions are ideally suited for utility-scale Wind, Solar and jobs
Over 15% of total greenhouse gas emissions in the EU come from coal-fired energy generation. 18 EU countries still use coal for electricity production. The argument goes that the phasing out of coal threatens the livelihoods of coal workers and their regional economy. But it should be the opposite, argue Elif GĂŒndĂŒzyeli and Jörg MĂŒhlenhoff at CAN Europe. Coal regions are ideally suited for new gigawatt-scale wind and solar. They already have the … [Read more...]
Rooftop Solar: economies of scale can challenge the centralised grid
One of our recent articles explained how rooftop solar PV is more expensive that a centralised supply, and that the transmission and distribution cost savings of the rooftop system, on their own, do not make up for this cost difference. Here, Javier LĂłpez Prol at the Wegener Center for Climate and Global Change, University of Graz, responds to those challenges. First, the economies of scale of distributed rooftop solar are yet to be realised. … [Read more...]
Why promote Rooftop Solar when the Grid is so much cheaper?
Is rooftop solar in the U.S. getting more support than it deserves? One main argument from its advocates is that it will cut grid transmission and distribution costs that total hundreds of millions. Severin Borenstein at the Energy Institute at Haas crunches some numbers to try to uncover the true âavoided costsâ. He shows that any savings wonât come even close to making up for the higher cost of rooftop electricity. Itâs no match for the gridâs … [Read more...]
Will Germanyâs âEEGâ energy law amendments make renewable targets harder to meet?
Germanyâs Renewable Energy Sources Act (Erneuerbare-Energien-Gesetz/EEG), now 20 years old, is under discussion as a new amendment is supposed to come into force on January 1st 2021. Simon Göss at Energy Brainpool takes a detailed look at the highlights, including the new and higher targets, the financial role of municipalities, clean electricity subsidies, and solar and wind tender volumes. He explains there has been serious criticism of the … [Read more...]
Swedenâs new âprosumersâ: electricity generation at the city, village and residential level
54% of Swedenâs power already comes from renewables â the target is 100% by 2040 - and more and more is being generated locally on a small distributed scale, says Harry Kretchmer writing for the World Economic Forum. âDistrict Heatingâ plants are today using excess heat to warm over 75% of Swedish homes. Residential generation is happening too, creating âprosumersâ who both produce and consume. In Ludivika, 1970s flats have been retrofitted with … [Read more...]
Virtual blockchain for prosumers replicates a live utility-scale grid
Wayne Hicks at NREL describes research thatâs created a virtual blockchain âprosumerâ accounting system that replicates a live utility-scale grid. The goal of a real-world application is to allow countless individual households with their own electricity storage and generation to buy and sell power to each other; a truly revolutionary pathway. Clearly, it will require a system that securely accounts for vast amounts of transactions - a big enough … [Read more...]
Midwest U.S. grid operator MISO: modelling for a clean energy future
Planning canât be easy for a grid operator. Take MISO which operates one of the worldâs largest energy markets. Theyâre responsible for integration and bulk transmission across the central U.S., but decisions on the actual future energy mix and demand are being made elsewhere: by state governments, utilities and consumers big and small. Given the amounts invested in infrastructure and the lead times involved, no one will thank MISO if their … [Read more...]
Germany 2021: when fixed feed-in tariffs end, how will renewables fare?
Starting in 2021 many of Germanyâs existing âpioneerâ wind turbines, solar PV installations and biogas plants â launched with generous price guarantees - will stop receiving fixed feed-in tariffs. That means renewable capacity may be shut down if they canât find a new business model to run on. The new rules comes at a decisive time for Germanyâs energy transition as it tries to increase renewables to meet emissions targets and gradually increase … [Read more...]
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