Mirror, mirror on the wall…

The two links below, are from the online edition of Germanys biggest  News Magazine “Der Spiegel” (unfortunately only in German)

Amazing to see, how even in this respected and well known paper, slowly the idea of small solar installations, like the ones which SoLenium-technology  is advocating in this blog, is being taken seriously.

There is talk of an “attack of the photovoltaic-Guerrillas” and from “Power meters which turn backwards” and most significantly, that “it is against the norm, but not against the law”

The only downside is that both articles are almost exclusively based on a single source, which on closer inspection of their website, does not present itself as ‘very professional’.

For the content of the articles however this is practically irrelevant.

http://www.spiegel.de/wirtschaft/service/eigenverbrauch-von-strom-neuer-markt-neue-gerechtigkeitsfrage-a-939563.html#js-article-comments-box-pager

http://www.spiegel.de/wissenschaft/technik/mini-photovoltaik-solarenergie-vom-eigenen-balkon-a-923219.html

Look at these pictures as well.

http://www.spiegel.de/fotostrecke/solarenergie-selbstversorgung-mit-mini-kraftwerken-fotostrecke-101637.html

THE ARTICLES IN A NUTSHELL

It describes the original vision of Photovoltaic as being for individual people, but the main constrains, that to actually use it, one has to have once very own roof.

With small plug and play installations as promoted by http://www.suninvention.com/ these modules become easily transportable and thus roof-top independent. Even if people are moveing house, they can simply take them with them.

It then discusses in some detail the risks involved in this approach, and whether these risks are constructed by the industry or real.

The emphasis however, is on the reintroduction of fairness and a return to the initial solar idea, of self consumption, without subsidies or feed in tariff and a money return after approximately ten years.

A very encouraging and interesting read, a pity really, that it does not come in English.

Here however, one addition to the articles, because in them, this aspect is not very clear;

The risk of overloading and maybe setting alight the lines inside the house is very small, but real.

By plugging a solar installation straight into a wall outlet, the circuit this outlet is on ‘all in a sudden’ gets power from two sides at the same time. A consumer sitting between the two can either take the solar power (if enough is present) from one side, or ordinary power from the other side as usual.

A problem however is potentially created, if one connects more or a bigger consumer than usual at the same place. Could the circuit provide only 10 Ampere before (approximately 2300 Watt) then there is now somewhat more amperage available, depending on the size of the connected installation.

For small installations this effect is minimal, but for slightly bigger installations (as SoLenium-technology  promotes them as well), this can quickly be as much as another 10 Ampere.

10 + 10 = 20 Ampere (roughly 4300 Watt) is about as much, as the same circuit might theoretically carry. If this amount is drawn trough under dimensioned  or old wires, then this might exceeds those wires capacity, and since the normal fuse of 10 Ampere does not register anything out of the ordinary, it might well be, that a cable fire is possible to occur.

To prevent this from happening,  SoLenium-technology  offers you all the necessary advise. And if you are interested and want to learn more about this form to create and  consume  your own energy, than we recommend as always “read on”!

[Deutsche Übersetzung]

Spieglein, Spieglein an der Wand…

Nachstehend finden Sie die Links,  zu zwei Artikel im Online-Spiegel , die sich beide mit der Problematik der Fotovoltaischen Kleinstanlagen  auseinandersetzen.

Erfrischend, wie darin dieselben Argumente auftauchen, wie sie  SoLenium-technology  genau so in diesem Blog verwendet.

Von einem “Angriff der Photovoltaik-Guerilleros” ist da die Rede, von “Stromzählern, die rückwärts laufen” und ” Gegen die Norm, aber nicht verboten”

Schade nur, dass beide Artikel lediglich auf (fast) einer einzigen Quelle beruhen, die sich bei näherer Betrachtung leider nicht sehr professional auf ihrer Webseite präsentiert.

Dem Inhalt jedoch tut dies keinen Abbruch.

http://www.spiegel.de/wirtschaft/service/eigenverbrauch-von-strom-neuer-markt-neue-gerechtigkeitsfrage-a-939563.html#js-article-comments-box-pager

http://www.spiegel.de/wissenschaft/technik/mini-photovoltaik-solarenergie-vom-eigenen-balkon-a-923219.html

Diese Bilder sind auch nicht schlecht.

http://www.spiegel.de/fotostrecke/solarenergie-selbstversorgung-mit-mini-kraftwerken-fotostrecke-101637.html

Eine sehr interessante Lektüre, und hier nur noch eine ganz kleine Ergänzung…

Die beschriebene Überlastung der Leitungen ist nicht sehr verständlich dargestellt. Das Risiko entsteht folgendermaßen;

Wenn man die Solar Module einfach in eine Steckdose steckt, bekommt der Stromkreis an dem sich diese Steckdose befindet ‘plötzlich’ von beiden Seiten Strom. Ein Verbraucher der nun in der Mitte sitzt, nimmt sich den Strom entweder von der Solaranlage (wenn sie genug einspeist) oder aber direkt wie vorher vom Netz.

Das eigentliche Problem entsteht jedoch erst wenn man mehr Verbraucher anschließt als sonst, was plötzlich scheinbar problemlos geht. Hatte der Stromkreis vorher nur 10 Ampere zur Verfügung, was in etwa 2300 Watt entspricht,  stehen ihm plötzlich von der anderen Seite (Solar) noch einmal ein paar Ampere mehr zur Verfügung.

Bei kleinen Anlagen ist dieses minimal, aber bei etwas größeren Anlagen (wie etwa von SoLenium-technology promotet) werden daraus mitunter auch schon mal bis zu 10 Ampere.

10 + 10 = 20 Ampere (etwa 4600 Watt) lassen sich also theoretisch an so einen Stromkreis anschließen. Wenn das nun gebündelt durch eine schwache oder alte Leitung zum Verbrauchsgerät geht, sind die Kabel für eine solche Last in der Tat nicht ausgelegt, und da die netzseitige 10 A Sicherung diese Überlastung überhaupt nicht mitbekommt, kommt es unter Umständen tatsächlich zum Brand.

Um so etwas von vornherein auszuschließen, berät SoLenium-technology gerne. Und sollten Sie noch weiteres Interesse an dieser Art der Selbstversorgung haben, empfehlen wir wie immer “weiterlesen!”

Are we not forgetting something?

There appears to be a new movement towards the use of more nuclear energy in the west, which claims this to be the only clean, safe and economically viable solution to the worlds environmental and energy problems.

But can this be so?

In many discussions with the chief science editor of the German magazine “Der Spiegel”, a good friend of mine, I have learned many a thing about the real risks (from a scientific and empirical view) for a variety of strongly opinionated things.

– Asbestos fibres pose a smaller health risk than heavy smoking – for example. We also discussed Fukushima at length, discussing media hype and science fact.

There is a reason why most scientists would happily fly to Mars or the Moon.

They consider it safe.

But, anybody who has seen the tinfoil wrapt moon lander pod in the British science museum might have a different opinion.

Does “is safe” really make it safe?

Below is a reference to a blog which I am following setting me off on this, and at the bottom my very personal reaction.

Extract from a blog, written by Jerry Graf
http://edition.cnn.com/2013/11/03/

world/nuclear-energy-climate-change-scientists-letter/index.html

“……No energy system is without downsides. We ask only that energy system decisions be based on facts, and not on emotions and biases that do not apply to 21st century nuclear technology.”

Their request sounds very much like the words I often use to summarize my viewpoint…………..There is no doubt that we in the USA need to alter our energy strategy. The question of how we will change it, however, needs to be determined by scientific evaluation of fact and logical analysis of performance and economics; not by emotion, political considerations, and “feel good” methodologies.

Here is my reply to him.

Nothing is often More! Wrong than the attitude to know better.
Chernobyl happend, because an expert superviser overruled the concerns of the responsible operator during a stress test, to the point of dismissing him from his function, and of course the known end-result.
Communism and Religion claim the almighty wisdom leading, when given the opportunity, to dictatorial roule.
I agree with a lot of what you are saying, but “emotions” are not just a silly notion of the uneducated masses. Quite often they are a very real indication of the “quality” of something. I recommend “Blink” from Malcom Gladwell.
Yes! Air travel is safer than all other means of modern communication, but this is not intuitiv to a lot of people. The risks though small are perceived as horrible and gruesome (because they can’t be avoided once they happen). Statistically flying is still safer, but try tell this to any victim of a plane-crash!
Most plan crashes are a result of human error of cours, but so are most industrial disasters.
Life is about living! And not about economics.

Note: I always say, “For a dying soldier, any conflict, no matter how small, is the ultimate war”