ᐅ Evaluating the Proposal and Technology of a Photovoltaic System

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

420x23 modules have a capacity of 9.66 kWp.
If I subtract the price for the battery storage (does he mean the 4.4 kW only for the storage or for storage plus installation?), I end up with a price of 2248€ net per kWp. That is really expensive in my opinion.

kati1337 schrieb:

That is really expensive in my opinion.

I think so too, but there is no cheaper offer available.

hanghaus2023 schrieb:

I agree, but there isn’t a cheaper offer available.

Have you also requested a quote without a storage system? Maybe they’re using some kind of mixed pricing model?
My sister recently received some offers for kilowatt peak (kWp) at around 1500 net per kWp, but the order was placed just before the outbreak of the war, so the installation took quite a while because everyone was very busy. I don’t know if you can still expect prices in that range. But this is mentioned quite often here in the forum.

kati1337 schrieb:

Have you also requested a quote without the attic/storage space anywhere?

Yes. Unfortunately, I haven’t received any quote yet.

The common questions:
- Why is the energy consumption so high? Optimizing this saves both money and the environment the most.
- Why such a small photovoltaic system?
- Why such a large battery storage?
- Why is the inverter so small?
- How many quotes have you obtained?