ᐅ Evaluating the Proposal and Technology of a Photovoltaic System
Created on: 30 Jan 2023 12:00
H
hanghaus2023
Hello,
I am planning to equip my house with a photovoltaic system.
Electricity consumption: 7100 kWh per year
Southwest orientation, roof pitch 45 degrees
Most affordable photovoltaic offer:
23 * modules
Jolywood JW-HD108N-420W (frame: black, backsheet: glass)
- Best price-performance ratio: high nominal power of 420 W per module and an efficiency of 21.51%.
- Linear power warranty for 30 years (minimum 87.4% after this period).
- 25 years product warranty from the manufacturer.
- Half-cut cells: two separate cell areas connected in series reduce shading losses.
- Front and back glass with anti-reflective technology.
23 * modules DC installation including scaffolding
1 * Sungrow SBR096 9.6 kWh
- High-voltage lithium iron phosphate battery with multi-level protection concept and comprehensive safety certifications.
- Up to 30A continuous charge and discharge current with high efficiency and 100% usable energy.
- Plug & Play, no wiring required between individual battery modules.
- Of the total price, €4,476.16 net is allocated to the battery storage.
1 * Sungrow Hybrid SH8.0RT
- Three-phase hybrid inverter for residential use.
- Fast charging/discharging to easily manage consumption peaks.
- High self-consumption through optimized integrated energy management system.
- Remote firmware updates and customizable settings.
- Quick and easy installation, commissioning via smartphone.
1 * AC installation for Sungrow SBR096 9.6 kWh battery with Sungrow inverter(s)
According to the provider, the meter cabinet does not incur any additional costs.
Note:
The cost for the required additional electricity meter is not included in the purchase price. Your local grid operator is responsible for installing this meter and will charge you separately for this service.
Net price: €26,192
The provider is relatively new to the market and has 150 ***** reviews on Google.
Previously, I received offers with lower specifications starting above €50,000.
Is there anything to consider regarding taxes?
Honestly, I have no expertise in this area. Is there an expert here who can technically and financially evaluate the most affordable offer for me?
Thank you very much for your help from
hanghaus2023
I am planning to equip my house with a photovoltaic system.
Electricity consumption: 7100 kWh per year
Southwest orientation, roof pitch 45 degrees
Most affordable photovoltaic offer:
23 * modules
Jolywood JW-HD108N-420W (frame: black, backsheet: glass)
- Best price-performance ratio: high nominal power of 420 W per module and an efficiency of 21.51%.
- Linear power warranty for 30 years (minimum 87.4% after this period).
- 25 years product warranty from the manufacturer.
- Half-cut cells: two separate cell areas connected in series reduce shading losses.
- Front and back glass with anti-reflective technology.
23 * modules DC installation including scaffolding
1 * Sungrow SBR096 9.6 kWh
- High-voltage lithium iron phosphate battery with multi-level protection concept and comprehensive safety certifications.
- Up to 30A continuous charge and discharge current with high efficiency and 100% usable energy.
- Plug & Play, no wiring required between individual battery modules.
- Of the total price, €4,476.16 net is allocated to the battery storage.
1 * Sungrow Hybrid SH8.0RT
- Three-phase hybrid inverter for residential use.
- Fast charging/discharging to easily manage consumption peaks.
- High self-consumption through optimized integrated energy management system.
- Remote firmware updates and customizable settings.
- Quick and easy installation, commissioning via smartphone.
1 * AC installation for Sungrow SBR096 9.6 kWh battery with Sungrow inverter(s)
According to the provider, the meter cabinet does not incur any additional costs.
Note:
The cost for the required additional electricity meter is not included in the purchase price. Your local grid operator is responsible for installing this meter and will charge you separately for this service.
Net price: €26,192
The provider is relatively new to the market and has 150 ***** reviews on Google.
Previously, I received offers with lower specifications starting above €50,000.
Is there anything to consider regarding taxes?
Honestly, I have no expertise in this area. Is there an expert here who can technically and financially evaluate the most affordable offer for me?
Thank you very much for your help from
hanghaus2023
H
hanghaus202330 Jan 2023 13:01RotorMotor schrieb:
- Why is the consumption so high? Optimizing this will save the most money and benefit the environment. This might not be relevant here. There are 2 residential units with 6 adults. I know that the biggest improvements come from saving energy.
RotorMotor schrieb:
- Why such a small photovoltaic system? Because I’m covering the cost myself. Taking out a loan is not an option.
RotorMotor schrieb:
- Why such a large battery storage? That’s what was offered to me. What would you recommend? I understand that battery storage often doesn’t pay off economically. But at 4 kWh, it seemed reasonable.
RotorMotor schrieb:
- Why is the inverter so small? I have no idea. Isn’t it designed for 10 kW?
RotorMotor schrieb:
- How many quotes did you get? 7
So if you are really looking at more than €2000 per kWp, I would keep searching. My first quotes were also over €2000, with the best complete offer at around €1550. But it was clear that many are now partly including the tax in the price and marking it up as profit. I wouldn’t accuse anyone of that, but it was often similar with the KFW subsidies.
R
RotorMotor30 Jan 2023 15:58hanghaus2023 schrieb:
This probably isn’t relevant here. 2 residential units, 6 adults. I know the biggest optimization would come from savings. That is already relevant for the cost-effectiveness.
I suppose that’s why you mentioned it?
Is heating done with electricity as well?
hanghaus2023 schrieb:
Since I will be paying for it myself. A loan is not an option. So the limit is only your budget, not the available space?
Basically, you should always aim to fully utilize the roof!
hanghaus2023 schrieb:
That’s what was offered to me. What would you recommend here? I know that batteries are generally not considered very cost-effective. But at 4 kWh it sounded quite good. With the relatively high consumption, 10 kWh can still make sense if the photovoltaic system is large enough!
hanghaus2023 schrieb:
No idea, isn’t it designed for 10 kW? 8
hanghaus2023 schrieb:
7 Were all of them that expensive or have you simply not received any offers yet?
H
hanghaus202330 Jan 2023 17:48RotorMotor schrieb:
That’s already relevant for the cost-effectiveness.
I guess that’s why you mentioned it?
Is the heating also electric? No, it’s gas. Hot water is generated with a solar thermal system. It has already paid off after a short time.
RotorMotor schrieb:
So it’s limited only by the budget, not by space?
Basically, you should always try to fully utilize the roof space! Let’s put it this way. Photovoltaics are quite expensive right now, so I only want to install as much as necessary. At most, you could fit 33 modules in a sensible layout.
RotorMotor schrieb:
With relatively high consumption, 10kWh could still make sense if the photovoltaic system is large enough! Good to know. Is 10kW realistic for the mentioned battery?
Nominal capacity: 9.6 kWh
Usable energy [1]: 9.6 kWh
Nominal voltage: 192 V
Operating voltage: 150 – 219 V
DC nominal power: 5.76 kW
Max. charge/discharge power: 6.57 kW
RotorMotor schrieb:
8 The datasheet says:
SH8.0RT
Max. photovoltaic input power: 12,000 W
RotorMotor schrieb:
And were all of them this expensive or have you just not received other offers yet? Yes, they were extremely expensive, ranging from 30k to 50k, all including the battery. There were no offers without a battery.
May I ask which region you are looking in? I thought it was already expensive here in Bavaria 😳 Have you also checked with smaller companies? The “only with storage” option was mainly offered to me by the large national providers who mostly sell these “all-in-one” solutions with storage and inverter combined.
H
hanghaus202330 Jan 2023 18:40@HnghusBY Then we are both in Bavaria. I am in the Upper Palatinate region.
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