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
KoalasAreCute17 Sep 2023 22:18RotorMotor schrieb:
Why wasn’t the house fully finished at once, and half of it added later?
You can feed energy back without a meter.
Why is there going to be a battery storage as well? I assume he wants to take advantage of the new subsidy. I’m joking that we’ll add a battery, another wall charger, and cover the north side. That way we could collect the incentives.
H
hanghaus202318 Sep 2023 08:17RotorMotor schrieb:
Why wasn’t the system fully installed from the start, with the other half added later?
You can feed in without a meter.
Why is an energy storage system still planned? This was primarily a financial decision.
Yes, but my electrician risks losing his license with the utility provider.
Since KFW is now providing a subsidy.
H
hanghaus202318 Sep 2023 08:23KoalasAreCute schrieb:
I assume he wants to take advantage of the new subsidy. I joke that we should add a battery, another wall box, and cover the north side. That way we could cash in.Yes, the KfW makes it somewhat more affordable—if we’re among the lucky 50,000. Luckily, I still have some space on the south side.And didn’t build it right away.
Hello,
Sorry to jump in with a question, but since you mentioned both storage and electric cars:
How can the EV battery actually be integrated into the home energy storage system? At least some cars (like the Hyundai Ioniq 5) can also supply power back. For the Hyundai, I believe the max is 3.6 kW. We are just starting to consider leasing something like this, so wouldn’t it be more interesting to use the 50-75 kWh battery in the carport instead of installing a 5-10 kWh battery in the basement?!
I need the battery overnight anyway, and the car is definitely parked outside then.
Best regards,
Andreas
kati1337 schrieb:
I know battery storage systems often get criticized, but we have had ours running for 3 weeks now and I have to say it’s definitely worthwhile for us.
Sorry to jump in with a question, but since you mentioned both storage and electric cars:
How can the EV battery actually be integrated into the home energy storage system? At least some cars (like the Hyundai Ioniq 5) can also supply power back. For the Hyundai, I believe the max is 3.6 kW. We are just starting to consider leasing something like this, so wouldn’t it be more interesting to use the 50-75 kWh battery in the carport instead of installing a 5-10 kWh battery in the basement?!
I need the battery overnight anyway, and the car is definitely parked outside then.
Best regards,
Andreas
H
hanghaus202318 Sep 2023 17:24Hello @andimann Maybe you should ask such questions in a photovoltaic forum.
The German industry is working on the topic of bidirectional charging. So far, they have been unsuccessful in developing a standard, let alone the hardware for it.
Your idea only makes sense if you feed the electricity from your own photovoltaic system back into the car. But usually, the car is parked at work.
The German industry is working on the topic of bidirectional charging. So far, they have been unsuccessful in developing a standard, let alone the hardware for it.
Your idea only makes sense if you feed the electricity from your own photovoltaic system back into the car. But usually, the car is parked at work.
andimann schrieb:
Hi,
sorry for jumping in with a question here, but since you also mentioned storage and electric cars:
How can the electric car’s battery be integrated into the storage concept? At least some cars (like the Hyundai Ioniq 5) can also supply power back. I believe the Hyundai can do a maximum of 3.6 kW. We are just starting to think about leasing something like that, and wouldn’t it be interesting to use the 50-75 kWh battery in the carport instead of installing 5-10 kWh of battery storage in the basement?!
I definitely need the battery overnight since the car will be parked outside anyway.
Best regards,
Andreas We have only considered our electric car as a consumer. I hope bidirectional charging will become available someday. Our car supports it, but as far as I know, our house system does not.
If you consider using the car solely as storage and discharging it at night, you obviously need to make sure you still have enough charge left in the morning to get to work and back. We currently discharge 12-16 kWh in the evening/night. Other households will have different numbers, but that is already a significant portion of most EV batteries.
Besides, both strategies pay off for us because we currently charge both throughout the day, even under moderate weather conditions. Our electric car only charges via single-phase AC and can therefore draw just about 3.6 kW, while the solar system peaks at over 8 kW. The rest of the energy then goes into the stationary battery; otherwise, we'd just feed it into the grid for the feed-in tariff. 🙂
Even with the battery and the electric car combined, our biggest challenge right now is not being able to store enough and still having to give away too much energy at the feed-in tariff. =) We are not commuters, and we can’t pump nearly as much surplus solar power into the car as is generated.
I can say more in winter about how this behaves relative to the heat pump’s load times.
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