Hello. We would also like to install a photovoltaic system and currently have three quotes. So far, we have received two, and the third one is still being prepared.
A local provider offered us the following:
40 x 410 W mono S4 half-cut modules = 16.4 kWp
Q.HOME+ ESS HYB- G3 3-phase 15.0 kWp inverter & 6.0 kW battery storage
Including installation, scaffolding, new distribution board, grounding rod, equipotential bonding bar, and all formalities and registration for just under €29,400.
The modules are arranged facing south-southwest and some towards northeast.
The second offer is almost the same price but has significantly lower kWp and comes from a company operating nationwide in Germany.
Do you think this is reasonable? I personally find it still quite expensive and am curious about the third offer. Are the components okay?
A local provider offered us the following:
40 x 410 W mono S4 half-cut modules = 16.4 kWp
Q.HOME+ ESS HYB- G3 3-phase 15.0 kWp inverter & 6.0 kW battery storage
Including installation, scaffolding, new distribution board, grounding rod, equipotential bonding bar, and all formalities and registration for just under €29,400.
The modules are arranged facing south-southwest and some towards northeast.
The second offer is almost the same price but has significantly lower kWp and comes from a company operating nationwide in Germany.
Do you think this is reasonable? I personally find it still quite expensive and am curious about the third offer. Are the components okay?
R
RotorMotor8 May 2023 07:41Whether a private storage system actually helps the grid is questionable. They don’t even balance the load on the correct phase.
Moreover, most systems operate very inefficiently. For example, they charge in the morning when the grid actually doesn’t need the power and only discharge at night when the grid has sufficient supply. In winter, when the real demand occurs, these systems often remain unused in the corner.
To genuinely support the grid, the system would need to use information from the grid itself instead of merely trying to save a few cents for the owner...
Moreover, most systems operate very inefficiently. For example, they charge in the morning when the grid actually doesn’t need the power and only discharge at night when the grid has sufficient supply. In winter, when the real demand occurs, these systems often remain unused in the corner.
To genuinely support the grid, the system would need to use information from the grid itself instead of merely trying to save a few cents for the owner...
RotorMotor schrieb:
Then there’s also the fact that most systems operate quite inefficiently. So they always start charging in the morning, even when the grid doesn’t need the energy yet.Is that the case? Aren’t there already systems available that can be set to store energy only once a certain production threshold is reached, or that store a maximum of 20% of the generated energy?
Do they really sit completely unused during winter? I mean, apart from a few days here and there, we actually had photovoltaic output throughout the entire year in our old house. Back then, we only had a 4.55 kWp (kilowatt peak) system. Now we are getting over 12 kWp. The highest load we ever saw in the old house was about 6 kWh, my husband said. Usually, our house consumption is well below that. I would expect that even in winter, at least partial cycles are possible. You might not get a full cycle, but it should still provide some benefit during that time, right?
The winter days are probably the reason why people generally plan for around 170–200 cycles per year, not 365. =)
The winter days are probably the reason why people generally plan for around 170–200 cycles per year, not 365. =)
D
DaGoodness8 May 2023 08:55Of course, the storage system is not left unused throughout the entire winter.
In 2021, my storage system reached a total of 260 cycles. In 2022, it was down to 230 cycles (due to several weeks of remote shutdown by Senec).
Here are some figures showing how much the storage was charged during the winter months:
November 2022: 223 kWh
December 2022: 91 kWh
January 2023: 103 kWh
February 2023: 190 kWh
March 2023: 200 kWh
In 2021, my storage system reached a total of 260 cycles. In 2022, it was down to 230 cycles (due to several weeks of remote shutdown by Senec).
Here are some figures showing how much the storage was charged during the winter months:
November 2022: 223 kWh
December 2022: 91 kWh
January 2023: 103 kWh
February 2023: 190 kWh
March 2023: 200 kWh
The larger the photovoltaic system, the more likely it is that some energy will be stored even during winter, yes. However, you need to convert these small daily yields into "production hours" to see whether the household might be consuming all the generated energy anyway, especially when working from home.
On the other hand, there is also a maintenance charge from the grid.
260 cycles is quite a lot. It would be necessary to know more about the system size and the user’s consumption behavior. Individual values can be very misleading.
On the other hand, there is also a maintenance charge from the grid.
260 cycles is quite a lot. It would be necessary to know more about the system size and the user’s consumption behavior. Individual values can be very misleading.
Similar topics