ᐅ Planning a Photovoltaic System – Is There a Tool Available?

Hello everyone,

Thank you for your responses. I have looked into various tools, but in the end, measuring and working with the plans was the most effective for me. However, there is one question I hadn’t considered and would like to ask for your opinion. Our house is a mid-terrace house. I had planned to install a row of panels on the east and west sides of the dormer (see plan), which would just fit space-wise. Now here is the issue: the property boundary on the east side crosses over the roof. Although the roof physically belongs to our house, I suspect that the strip still belongs to the neighbor (marked in yellow). I find this a bit unusual, but this seems to be what the plan shows. For me, this means I cannot simply install anything on that strip. What do you think? I was not aware of this before, but after seeing the dividing walls in the plan, I assume this is correct. Does this also mean that for a roof renovation or repair on this strip, the neighbor would be responsible and I would have to coordinate everything with them? It could be that a repair is necessary there (which is actually the case), because although the roof belongs to my house, on the overhang that extends over their side, there is a flashing strip hanging down that makes considerable noise when it’s windy. I would appreciate any answers or assessments.

One more question: Is it possible to relocate such ventilation bricks, or possibly cover them with a panel? I think the latter is less ideal, as the air beneath the panels would likely get even warmer in summer.

Basically, I believe this overhang belongs to you and should be maintained and serviced by you. Additionally, you should ask your neighbor if they would have any issues if the panels don’t meet the minimum spacing requirements.

And this roof tile is quite flat already; if you do a herringbone pattern, the thickness will probably be sufficient. However, it costs a bit more.

Take a sheet of paper and draw your roof to scale. Then cut out some photovoltaic modules to the same scale. This way, you can arrange them on the roof like a puzzle to fit the maximum number possible. With a bit of imagination, you can actually do this even without the puzzle pieces. It’s not rocket science...

Thanks, I now have an idea of what I can fit on the south side (14-16 modules). I have requested some quotes. The best-sounding offer to me is for 7 kW with a 10 kW storage system, costing 17,500 euros. The price per kW peak is 1,850 euros. This would be from a local provider. If I increase the number of modules to 10 kW and also install on the north side (dormer), the cost per kW goes down. But the question is whether it’s worth it since I currently consume around 2,500 kWh per year. Maybe this year I will add a heat pump if I don’t install a gas heating system. What is your opinion, is this a fair price? My roof geometry is quite challenging.

HubiTrubi40 schrieb:
Maybe this year the heating and ventilation unit will be added, if there’s no gas heating.

What is there to consider? The new exciting law coming from the current government coalition? I strongly recommend you inform yourself thoroughly. I see gas heating as a poor alternative. But you can use the "new freedom in the basement" (I can’t find a suitable irony emoji right now) to get independent information.