Does storage make 100% renewables unaffordable? Martin Günther | pixelio.de

Scenarios » 02.09.2014

Does storage make 100% renewables unaffordable?

Though the IWES study does not estimate cost, one assumption for power storage is clearly unrealistic in this respect. Would a focus on cost – or Germany’s actual target of 80% renewable power – change things? read more »

How much wind & solar does Germany need to install per year? PSM

How much wind & solar does Germany need to install per year?

In 2010, the German government outlined its grand strategy for transforming the entire energy system to be increasingly powered by renewable energy. For most Germans, it’s clear that wind and solar power will be the cornerstone of the future energy system, but how much will need to be built per year? read more »

Sixfold increase in wind power from fewer turbines? Craig Morris

Scenario » 01.09.2014

Sixfold increase in wind power from fewer turbines?

The recent IWES study on a 100 percent supply of renewable power implicitly expects Germany to increase the share of wind power from 15 percent fewer turbines, with overall power consumption remaining basically unchanged. What would that look like? read more »

The affordability of 100 percent renewable power Foto: Ewkaa/Wikipedia

Scenarios » 29.08.2014

The affordability of 100 percent renewable power

The scenario we have described this week for a completely green power supply in Germany focuses on technical feasibility, mentioning the cost impact only in passing. Today, I share some of my thoughts about the affordability of the scenario and make a final call for questions I will post to the researchers next week. read more »

New Energiewende website online Foto: Max/Fotolia.de

New Energiewende website online

Clean Energy Wire (CLEW) is a new project aiming to communicate the Energiewende to the world. Its first dossier went online this month. It’s about time – I have been getting a bit lonesome here fending off misreports over the past few years. But that loneliness is not over yet. read more »

Reaching independence from Russian energy deliveries Foto: PR

Reaching independence from Russian energy deliveries

Today Hans-Josef Fell, chairman of European Energy Security Forum EuroSEF-2014, 26 September in Brussels, writes about the chance to become energy independent in Europe and what that means for us. read more »

Findings from 100 percent renewable power study Rudis-Fotoseite.de | pixelio.de

Scenarios » 28.08.2014

Findings from 100 percent renewable power study

The study we have reviewed this week mainly highlights its findings for the grid. The discussion revolves around what is needed to maintain frequency and voltage. read more »

No boom and bust without boom Foto: Krannich Solar

Policy » 27.08.2014

No boom and bust without boom

What can we do to prevent the kind of boom-and-bust cycles that we saw from feed-in tariffs in Spain and the Czech Republic? That seems to be the question behind the call for reverse auctions as a way of “reforming” renewables policy. The concerns are unfounded. read more »

Assumptions about power consumption for 100 percent renewable supply Foto: Urgixgax - pixelio.de

Scenarios » 27.08.2014

Assumptions about power consumption for 100 percent renewable supply

What does the recent study on the technical feasibility of 100 percent green electricity in Germany assume about power consumption, including power storage? Today, we investigate – and report on a significant finding about wind power. read more »

“Reforming solar energy subsidies” Martin Günther | pixelio.de

Policy » 26.08.2014

“Reforming solar energy subsidies”

Recent paper on the situation in Australia suggests that a reverse auction might be a good way of replacing feed-in tariffs. What problem are they trying to fix? read more »