In July, I once again made no changes to my solar system. It is still lying flat on my balcony to make the most of the hours of sunshine. Last month, my small but mighty system even outperformed June and fed a total of 90.02 kWh into my grid. That's almost 3 kWh more than in June - a small but pleasing increase.
If I calculate these 90 kWh with my current electricity price, I have saved around 32,-€. This means that the system still has to generate 285,40€ to fully cover the purchase costs. Expressed in kilowatt hours, this means that the system still needs to capture around 791 kWh of sunlight so that I can really start saving after the initial costs.
I'm already playing with the idea of installing two more panels to further increase the output. However, I would first like to find a suitable offer before I make this investment. The idea of increasing the output of my system and thus accelerating the amortization is definitely appealing.
Im Juli habe ich erneut nichts an meiner Solaranlage verändert. Sie liegt immer noch flach auf meinem Balkon, um die meisten Sonnenstunden optimal auszunutzen. Im vergangenen Monat hat meine kleine, aber feine Anlage sogar den Juni übertroffen und insgesamt 90,02 kWh in mein Netz eingespeist. Das sind immerhin knapp 3 kWh mehr als im Juni – eine kleine, aber erfreuliche Steigerung.
Wenn ich diese 90 kWh mit meinem aktuellen Strompreis rechne, habe ich etwa 32,-€ gespart. Das bedeutet, dass die Anlage noch 285,40€ erwirtschaften muss, um die Anschaffungskosten vollständig zu decken. In Kilowattstunden ausgedrückt, bedeutet das, dass die Anlage noch etwa 791 kWh an Sonnenstrahlen einfangen muss, damit ich nach den Anschaffungskosten anfangen kann, wirklich zu sparen.
Ich spiele auch schon mit dem Gedanken, zwei weitere Paneele zu installieren, um die Leistung weiter zu steigern. Allerdings möchte ich zuerst ein passendes Angebot finden, bevor ich diese Investition tätige. Der Gedanke, die Leistung meiner Anlage noch zu erhöhen und damit die Amortisation zu beschleunigen, ist auf jeden Fall reizvoll.
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Interesting analysis, Louis!
As I live on the first floor, the possibility of installing a vertical panel in one of the windows is still something that doesn't appeal to me very much, because as my monthly electricity consumption is under 50 euros, the savings would have to be considerable for the initial investment.
Your post has aroused my curiosity, and maybe one of these days I'll stop by one of the electricity distribution companies to get a simulation of the initial cost.
It's always good to see investments that pay for themselves and end up being a profit after a few years.
I found this old post. My system was generating around 900kWh/month over the summer and exporting about 600kWh. I get a better rate for that now, so the system will pay for itself quicker. This is from 8kW of panels, so a different scale to you.
Uh, yea it's another scale :D i'm only on a rent flat so, makes no sense to invest high amount of panels - there are already panels on top of the roof for the people living under me
It has to be worth it to you. I think Germany has always been ahead on this stuff as I saw lots of talk of green issues when I lived there 30+ years ago. If nothing else it makes economic sense.
Thanks for finding it too @steevc there’s still value to be found in what people have written in the past, beyond the 7 day voting window
Is amazing what you can get out of a smaller system. I reckon we should use solar more often on smaller objects too, thus saving money on batteries, less waste etc etc.
The panels have got pretty cheap, but you tend to need other parks such as a battery and inverter. If you are going to be off grid then it can keep you going and could replace small generators that are very polluting. For running a house you need to get the professionals in to make it all safe and legal.
We’ve considered it because our property comprises of two buildings, the house and the garage with rooftops of different orientations and as such we’ve often considered putting panels on two of the rooftop surfaces to benefit from the daylight as much as possible. I reckon the inverter and battery could go in the garage. I quite like the whole engineering aspects of it too.
Build it!
Someone at work has a similar layout, but he is not convinced by the economics. A more complicated install will cost more, but I don't think people do it just for the money. That said, if we keep living here then it will save me money when I'm retired.
That’s the thing if we can save tomorrow then we can enjoy more of the money we’ve saved when younger; mind you it’s a balance really as round got to enjoy now too!
Bin gerade dabei mir auch noch eine auszusuchen. Habe eine vor fast 4 Jahren aufgestellt. Damals noch mit 250 Wp und für 400€. Im Moment bekomme ich von der Stadt noch bis zu € 150 Zuschuss. So rechnet sich die Anlage natürlich schnell.
Hast du auch einen Überblick, was du ins Netz einspeist? Ich verbrauche tatsächlich angenehm viel selbst, müsste aber noch mal ablesen gehen.
Im Juli kam ich auf 112kWh, habe aber auch ziemlich gute Bedingungen oben auf dem Flachdach mit super Ausrichtung nach Süden.
Leider nein, da fehlt mir die Technik zu um sowas zu monitoren. Bin jetzt grad aktuell auch am überlegen, ob ich wirklich meinen erzeugten Strom selbst verbrauche - Die Verkabelung ist ja eine 3-Phasen verkabelung und muss mal herausfinden, auf welcher Phase ich einspeise und auf welcher ich abnehme.
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