New solar roof register in Bonn goes online today

BN - Is the roof of my house or company building suitable for a photovoltaic system or a solar thermal system? This question can now be answered quickly and conveniently online with the help of the new solar roof cadastre of the city of Bonn. In a building-specific map display, a coloured marker indicates whether and to what extent a roof is suitable for energy generation by means of solar power. Step by step, further information, for example on the economic efficiency, can be retrieved via a yield calculator.

The suitability of the roofs of all 129,000 buildings in the city for solar energy generation was recalculated using the latest, improved data. For this purpose, elevation grid data was used, which was determined by the district government of Cologne by means of laser scanning in spring 2016. Compared to the previous version from 2010, the new Bonn solar roof cadastre features, among other things, a fourfold higher resolution and a more differentiated designation of the roof areas.

The suitability of the roof surfaces for electricity generation via photovoltaic systems as well as for domestic water heating and, for the first time, also for supporting building heating via solar thermal collectors was calculated. The calculations also took into account the current changes in the framework conditions with regard to feed-in tariffs and self-consumption of generated solar power.

How the application works

In the city map, the installable system size and many additional data such as yields and savings potentials can be displayed for each building. In a newly developed yield calculator, costs and yields can be calculated and compared by entering additional user-specific information such as electricity consumption or household size. In this way, every owner can quickly gain an overview of the suitability of his or her building for the use of solar energy. Detailed instructions are available at www.bonn.de/...solardachkataster.php.

The City of Bonn points out that the information from the solar roof cadastre is an initial non-binding assessment. Essential prerequisites for a decision to build a system, such as the condition of the roof or the static suitability, can only be clarified by suitable specialist companies or qualified consulting organisations. Information on this can be found on the website of the solar roof register.

Bonn roofs have potential

According to the potential analysis of the solar roof cadastre, 6,800,000 square metres in Bonn are suitable for solar power generation. This corresponds to about the size of 950 football fields. Approximately 800,000 megawatt hours of electricity could be generated on this area. This could cover about 50 percent of the total electricity consumption in Bonn. For solar thermal energy, the result of the potential analysis shows 88,461 buildings in Bonn that could be used for this form of energy generation. This corresponds to about 70 percent of the buildings in Bonn.

Link:
www.bonn.de/...solardachkataster.php

Keywords: Stock, Blogs & Portals, Bonn, DE-News, Renewable, Climate protection, Tenant electricity, News Blog NRW, PV, Quarters, Settlements, Solar thermal

Published 1 December 2020

New Leipzig Charter between aspiration and reality

On the occasion of the meeting of the EU Ministers for Urban Development and Territorial Cohesion on the "New Leipzig Charter", Daniela Wagner, Spokesperson for Urban Development of the Alliance 90/The Greens in the German Bundestag, explains:

We welcome the "New Leipzig Charter". Without the transformational power of cities and the ideas and energy of their inhabitants, we will not be able to meet the challenges of the climate crisis. Nevertheless, the Charter contains considerable gaps. The guiding principle of the resilient city is missing. The development of robust and resilient cities is important in order to better assess risks and to be able to recognise and prevent dangers in good time. Nor is the model of the healthy city mentioned - despite the heat waves caused by the climate crisis, a never-ending stream of air pollutants from fossil combustion engines and the current challenge of a global pandemic.

In addition, there is a huge gap between the claims of the "New Leipzig Charter" and the actions of the Federal Government, which after all helped to develop the Charter. It would be nice if the content of the Charter were reflected to some extent in the policies of the Federal Government. For example, it is hard to understand why the paper talks about reducing land consumption, but the Federal Government does the exact opposite and reintroduces the land-grabbing paragraph 13b in the Building Code, which is highly questionable in terms of environmental and housing policy, or pushes through the construction of age-old plans from the Federal Transport Infrastructure Plan.

If the federal government is serious about affordable and well-designed housing being fundamental to urban development policy, then it should finally provide more affordable housing, double federal funding for social housing construction and introduce the New Housing Community Benefit. The energy turnaround in existing buildings should finally be advanced. With the "Fair Heat" action plan, we have presented a package of measures that financially incentivises investments in energy modernisation of housing with energy savings and the switch to renewable heat and significantly lowers the hurdles for the investments.

The statement in the Charter that urban transport and mobility systems should be efficient, climate-neutral and multimodal is also correct. Unfortunately, there is a considerable lack of implementation of the transport turnaround. What the federal government has done so far in terms of strengthening bus and rail pales in comparison to the billions in subsidies for the automotive industry. At the same time, the federal government is putting the brakes on the expansion of electromobility and has parked the topic of charging stations on the hard shoulder.

Source: PM of BÜNDNIS 90/DIE GRÜNEN in the German Bundestag from 30.11.2020

Keywords:
Soil & land consumption, DE-News, Mix of uses, Resource efficiency, SDG 2030, City, Environmental policy, Housing policy