ᐅ Photovoltaics at Any Cost – Current Situation and Available Options
Created on: 31 Jul 2022 13:22
H
HnghusBY
Hello everyone,
After countless rejections due to overload, availability, and delivery issues, I have finally received an offer for a photovoltaic system.
The system is planned for our new build (completion in 2023). We have a gable roof, almost south-facing, with a 30-degree pitch, fully usable, about 50 sqm (540 sq ft) of roof area per side.
The house is being built in Bavaria, about 60 km (37 miles) from Thuringia.
The offer surprised me a bit. The following items are included:
14x MAXEON modules at 430 W each, heat pump system, totaling 6.02 kWp - €11,138
1x Tesla Powerwall 2.0, 13.5 kWh - €10,400
Installation, etc. - €3,130
Total: €24,668 net
I find that quite expensive. I would leave out the battery anyway, but even then, I think the price for the 6 kWp system is too high. Apparently, this is currently the price you pay in Bavaria if you can find someone at all. For me, the question is whether it even makes sense to invest right now or just pay for electricity. Of course, it’s a matter of calculation, but if you follow the discussions here, those prices seem sky-high — or not?
Is it better to get offers from other regions? Are there any recommendations around the 97XXX area?
After countless rejections due to overload, availability, and delivery issues, I have finally received an offer for a photovoltaic system.
The system is planned for our new build (completion in 2023). We have a gable roof, almost south-facing, with a 30-degree pitch, fully usable, about 50 sqm (540 sq ft) of roof area per side.
The house is being built in Bavaria, about 60 km (37 miles) from Thuringia.
The offer surprised me a bit. The following items are included:
14x MAXEON modules at 430 W each, heat pump system, totaling 6.02 kWp - €11,138
1x Tesla Powerwall 2.0, 13.5 kWh - €10,400
Installation, etc. - €3,130
Total: €24,668 net
I find that quite expensive. I would leave out the battery anyway, but even then, I think the price for the 6 kWp system is too high. Apparently, this is currently the price you pay in Bavaria if you can find someone at all. For me, the question is whether it even makes sense to invest right now or just pay for electricity. Of course, it’s a matter of calculation, but if you follow the discussions here, those prices seem sky-high — or not?
Is it better to get offers from other regions? Are there any recommendations around the 97XXX area?
R
RotorMotor23 Nov 2022 16:19DaGoodness schrieb:
So far in 2022, I have drawn 2085 kWh from the storage system. At 40 cents per kWh, that translates to savings of €646.35 (9 cents feed-in tariff already deducted). That matches my calculation quite well.
The cost shouldn’t have been more than €6,000.
With current prices, however, you quickly end up around €10,000. Then it doesn’t look promising.
D
DaGoodness23 Nov 2022 16:23Mine cost exactly €6,000. In 10 years, I will see whether it has paid off or not.
However, it should be noted that the figures this year are much lower due to the remote shutdown by Senec at the beginning of the year.
Last year, I used over 2,600 kWh from the battery storage.
However, it should be noted that the figures this year are much lower due to the remote shutdown by Senec at the beginning of the year.
Last year, I used over 2,600 kWh from the battery storage.
X
xMisterDx24 Nov 2022 00:16It’s exhausting... truly exhausting...
Amateurs show colorful images and are thrilled because they save a few cents per kWh... but they don’t consider the investment and ongoing costs... yet those few cents per kWh will never cover the purchase of the battery storage in the long term, and currently usually not even the purchase of the photovoltaic system itself...
And when you ask for a full cost calculation... really, really honest, I would be very glad to see one...
All you get are faith-based statements again, like “The installer said…” or “Renovator23 says: Sure, it’s worth it, renovate with me, then it’s worth it for both of us... or at least one of us... 😉”
People... what makes you believe that a battery storage system paired with photovoltaics pays off for you?
Look at the solar generation profile and then the load profile of your house... it’s nonsense and a waste of resources... end of story.
Amateurs show colorful images and are thrilled because they save a few cents per kWh... but they don’t consider the investment and ongoing costs... yet those few cents per kWh will never cover the purchase of the battery storage in the long term, and currently usually not even the purchase of the photovoltaic system itself...
And when you ask for a full cost calculation... really, really honest, I would be very glad to see one...
All you get are faith-based statements again, like “The installer said…” or “Renovator23 says: Sure, it’s worth it, renovate with me, then it’s worth it for both of us... or at least one of us... 😉”
People... what makes you believe that a battery storage system paired with photovoltaics pays off for you?
Look at the solar generation profile and then the load profile of your house... it’s nonsense and a waste of resources... end of story.
Fuchur schrieb:
Most of the time, you’re right with that statement, especially at today’s prices. However, there are definitely situations where it does work. I have been doing full cost accounting from the start. Could you provide an example of such a situation? What criteria are used to determine this? The occupants? The system configuration? The building’s energy efficiency? For me, this is always hard to grasp.
S
Stefan00124 Nov 2022 08:03HnghusBY schrieb:
Can you give an example of such a situation? What criteria do you use to determine it? Consumer behavior? System configuration? Energy efficiency of the house? For me, it’s always hard to grasp.A battery storage system can be worthwhile if you produce enough surplus energy on as many days as possible to fully charge the battery and cover the night consumption. In other words, you want as many battery cycles per year as possible. The more unused capacity you have (because you can’t fully charge it in winter or fully discharge it in summer), the less economical it becomes.Overall, you can do a simple rough calculation by dividing the expected total discharge energy over the battery’s lifetime by the cost.
Example: A 6 kWh battery with 4,000 charge/discharge cycles means 24,000 kWh can be withdrawn from the battery over its lifetime.
If the cost is €5,000, then that equals 5,000€/24,000 kWh = 0.21€/kWh.
At the same time, you might lose about €0.08 feed-in tariff, so the effective cost per kWh from the battery is around €0.29.
Then there’s the question of whether the specified cycle count can actually be achieved and over what period. If you don’t get one cycle per day, but rather about 200 cycles per year, then 4,000 cycles represent 20 years! The battery likely won’t last that long. In that case, the calculation becomes much less favorable. If it only lasts 10 years with 200 cycles per year, then the cost per kWh rises to over €0.42 plus €0.08.
(All values here are very approximate.)
To summarize again:
Calculate the maximum available discharge energy by factoring in cycles per year and expected lifetime, then divide that by the cost.
The number of cycles per year depends on the (time-related) pattern of electricity consumption, the storage system, and the solar setup.
Energy efficiency of the house only matters insofar as it affects electricity consumption.
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