ᐅ Quote for photovoltaic system including battery storage – storage yes/no?
Created on: 8 Sep 2024 16:53
H
haus_bau2025
Hello everyone,
My wife and I are currently planning to build our single-family home of about 140 m2 (1,507 sq ft) and are considering whether to build it to KfW 40 standard or not (mainly for cost reasons). We have received an offer from our construction company for a photovoltaic system with 6 kWp and a high-voltage battery from Varta with 6.5 kWh (6.5 kWh) storage capacity, costing around 18,000 euros. Since the battery alone costs nearly 6,000 euros, and I recall reading here in the forum that many people reject a battery because a) it is too expensive and b) it would be better to invest in additional photovoltaic modules instead, I wanted to ask how you would approach this situation. The plan also includes installing an air-to-water heat pump with central, decentralized, or controlled mechanical ventilation (we are still considering these options as well).
1.) Would you remove the battery and replace it with more photovoltaic modules? If yes, how much kWp capacity would you recommend for a single-family home built to KfW 40/55 standard with "normal use," i.e., occasional home office?
2.) Or would you keep the battery and increase the photovoltaic system capacity with additional modules?
Do you have any other ideas or suggestions regarding what we should pay attention to in connection with the photovoltaic system?
My wife and I are currently planning to build our single-family home of about 140 m2 (1,507 sq ft) and are considering whether to build it to KfW 40 standard or not (mainly for cost reasons). We have received an offer from our construction company for a photovoltaic system with 6 kWp and a high-voltage battery from Varta with 6.5 kWh (6.5 kWh) storage capacity, costing around 18,000 euros. Since the battery alone costs nearly 6,000 euros, and I recall reading here in the forum that many people reject a battery because a) it is too expensive and b) it would be better to invest in additional photovoltaic modules instead, I wanted to ask how you would approach this situation. The plan also includes installing an air-to-water heat pump with central, decentralized, or controlled mechanical ventilation (we are still considering these options as well).
1.) Would you remove the battery and replace it with more photovoltaic modules? If yes, how much kWp capacity would you recommend for a single-family home built to KfW 40/55 standard with "normal use," i.e., occasional home office?
2.) Or would you keep the battery and increase the photovoltaic system capacity with additional modules?
Do you have any other ideas or suggestions regarding what we should pay attention to in connection with the photovoltaic system?
M
MachsSelbst22 Sep 2024 23:30Yes, yes. These are the enthusiasts who read bedtime stories to every battery cell and spend 2 to 3 hours daily in the summer redirecting energy so that the storage is empty again the next day. Charging the car, heating 2,000 liters (530 gallons) of water, cooking 500 kg (1,100 lbs) of jam, and so on.
Then it might be "worth it"...
The average person, who leaves regulation to the automatic system, ends up with a storage that is always full in summer, always empty in winter, and somewhat useful in transitional periods—one they paid a high price for...
The same crazy debates happen in the electric vehicle fan... sorry, electric vehicle forum... everything is great, manufacturers do everything right, and if in doubt, the user is either too stupid, unwilling, incapable, or just a right-wing climate change denier...
What often gets forgotten in the calculation is the purchase price financed at 5–6%, depreciation, ongoing maintenance costs, and of course the reserves for repairs or replacement...
Then it might be "worth it"...
The average person, who leaves regulation to the automatic system, ends up with a storage that is always full in summer, always empty in winter, and somewhat useful in transitional periods—one they paid a high price for...
The same crazy debates happen in the electric vehicle fan... sorry, electric vehicle forum... everything is great, manufacturers do everything right, and if in doubt, the user is either too stupid, unwilling, incapable, or just a right-wing climate change denier...
What often gets forgotten in the calculation is the purchase price financed at 5–6%, depreciation, ongoing maintenance costs, and of course the reserves for repairs or replacement...
B
Buchsbaum06623 Sep 2024 15:11Currently, it gets dark around 7:00 PM. In my slightly larger barn, I have LED floodlights to provide sufficient lighting. Previously, I used halogen floodlights, which consumed significantly more electricity.
Today, the LED floodlights run for free because they are powered by my photovoltaic storage system. Just as an example.
At the moment, my daytime grid consumption is only about 50 watts. And it won’t be much higher until mid-November.
Without storage, I would feed more electricity back into the grid but also have significantly higher grid consumption. Personally, I prefer to save on grid consumption rather than feed electricity back.
Anyone who is happy to feed in electricity for 8 cents can simply skip the storage system.
Today, the LED floodlights run for free because they are powered by my photovoltaic storage system. Just as an example.
At the moment, my daytime grid consumption is only about 50 watts. And it won’t be much higher until mid-November.
Without storage, I would feed more electricity back into the grid but also have significantly higher grid consumption. Personally, I prefer to save on grid consumption rather than feed electricity back.
Anyone who is happy to feed in electricity for 8 cents can simply skip the storage system.
N
nordanney23 Sep 2024 17:53Buchsbaum066 schrieb:
Without a storage system, I would feed more energy into the grid but also have a significantly higher grid consumption. Personally, I prefer to save on grid consumption rather than focus on feeding energy back into the grid.
If you like to feed energy in at 8 cents, then you can just skip the storage system.Anyone who is offered a storage system by the solar installer should first calculate the cost per kWh. Usually, the storage system is much too expensive.Similar topics