Hello
we are planning a new semi-detached house.
We want to install a photovoltaic system later on.
We will get the right half shown in the photo. Orientation is southwest.
The photovoltaic system will of course be installed on the southwest side facing the garden.
The black area is the 3x5 m (10x16 ft) terrace, which will later be covered with a fixed terrace roof measuring 4 m (13 ft) deep and 5.5 m (18 ft) wide.
My question is whether it will still be possible to install a photovoltaic system on the roof once the fixed terrace roof is there?
If the terrace roof is on the southwest side in the garden, it will no longer be possible to set up scaffolding.
For maintenance or in case of problems, access to the photovoltaic system will be necessary later on (is access without scaffolding not possible?)
Or can the photovoltaic system be installed without scaffolding?
The house will have a gable roof and 2.5 full stories.
we are planning a new semi-detached house.
We want to install a photovoltaic system later on.
We will get the right half shown in the photo. Orientation is southwest.
The photovoltaic system will of course be installed on the southwest side facing the garden.
The black area is the 3x5 m (10x16 ft) terrace, which will later be covered with a fixed terrace roof measuring 4 m (13 ft) deep and 5.5 m (18 ft) wide.
My question is whether it will still be possible to install a photovoltaic system on the roof once the fixed terrace roof is there?
If the terrace roof is on the southwest side in the garden, it will no longer be possible to set up scaffolding.
For maintenance or in case of problems, access to the photovoltaic system will be necessary later on (is access without scaffolding not possible?)
Or can the photovoltaic system be installed without scaffolding?
The house will have a gable roof and 2.5 full stories.
R
RotorMotor17 Sep 2021 14:34konibar schrieb:
That's correct,
the panels start losing performance much earlier.
I installed Kyocera panels 12 years ago when they were considered among the best
(and still quite expensive).
I can't measure the efficiency exactly, but the output has clearly declined.
I estimate about 70% of the original value, although I try to clean them at least 4 times per year. Oh, that's much worse than what Fraunhofer found.
They reported an average degradation of 0.15% per year!
Are you sure nothing is actually damaged?
D
Deliverer17 Sep 2021 15:24I have a system here that will lose its subsidy in two years. It had its peak years in 2015 and 2018. So it doesn’t seem to have significantly deteriorated. And the other systems that were built around the same time here (back then everyone in the village knew each other ;-) have been running without any issues so far.
D
Deliverer17 Sep 2021 15:29Evolith schrieb:
I would like that (…) but the incentives here are minimal… I think it’s quite interesting how people come up with excuses. There is a subsidy for a product that offers great benefits both for the user and the environment, covering more than 100% of the product’s cost. Completely. Entirely. Often even with a PROFIT! But no! It should be even more!!!
And then the subsidy even feels like a "joke"...
I really don’t get it.
Deliverer schrieb:
I find it quite surprising how people come up with excuses. There is a subsidy for a product that provides great benefits both for the individual and the environment, covering more than 100% of the product cost. Completely. Fully. Often even with a PROFIT! But no! It still should be more!!!
And then the subsidy even feels like a "joke"...
I really don’t get it. When subsidies are available, the prices of photovoltaic systems also increase.
Deliverer schrieb:
I find it quite interesting how people come up with excuses. There is a subsidy for a product that provides great benefits both personally and environmentally, covering more than 100% of the product cost. Completely. Fully. Often even with a PROFIT! But no! It should be even more!!!
And the subsidy then even feels like a "joke"...
I really don’t get it. However, I still have to repay the loan/financing. I first need to have the money available monthly for that.
In our case, it would have been 400€ per month, with a subsidy of 2,000€, for a system costing 18,000€ (without battery storage, which I believe was 15kWh).
That’s not feasible for our situation, or we would have had to significantly restrict ourselves. That’s not worth it to me for the photovoltaic system.
That it supposedly pays off in the long run... yes. But the current bank balance simply doesn’t care about that.
R
RotorMotor17 Sep 2021 16:17To put it simply:
You receive the money from KFW and can repay it over 20 years.
For example, if you invest 15,000€ (about 15k) in a photovoltaic system, that equals less than €70 per month.
If you now receive €70 per month through feed-in tariffs or saved electricity costs, the system effectively costs you nothing — you don’t have to spend a single cent of your own money.
Systems costing around €1,000 per kWp are quite achievable, so for 15 kWp, with good orientation, you can expect about 15 MWh per year. At the current feed-in rates, that amounts to roughly €90 per month. With corresponding self-consumption, you could save even more.
So where exactly is the financial problem, and why would more subsidies or aid be necessary?
Yes, you shouldn’t overpay for the system.
And if your finances are really tight, it’s also worth considering suitable insurance options.
You receive the money from KFW and can repay it over 20 years.
For example, if you invest 15,000€ (about 15k) in a photovoltaic system, that equals less than €70 per month.
If you now receive €70 per month through feed-in tariffs or saved electricity costs, the system effectively costs you nothing — you don’t have to spend a single cent of your own money.
Systems costing around €1,000 per kWp are quite achievable, so for 15 kWp, with good orientation, you can expect about 15 MWh per year. At the current feed-in rates, that amounts to roughly €90 per month. With corresponding self-consumption, you could save even more.
So where exactly is the financial problem, and why would more subsidies or aid be necessary?
Yes, you shouldn’t overpay for the system.
And if your finances are really tight, it’s also worth considering suitable insurance options.
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