ᐅ Ordering a photovoltaic system through a prefabricated house manufacturer?
Created on: 19 May 2024 22:10
R
Romeostar
Hello everyone,
I’m currently considering whether it makes sense to purchase the photovoltaic system directly through the prefab house builder. It seems a bit expensive to me to buy a 10 kWp system with a 9.6 kWh battery storage for 26,000 euros including installation. What do you think?
Should I perhaps look separately for cheaper alternatives?
Or do the advantages like coordination, scaffolding access, and warranty coverage that come with buying through the prefab house builder outweigh this?
Best regards
I’m currently considering whether it makes sense to purchase the photovoltaic system directly through the prefab house builder. It seems a bit expensive to me to buy a 10 kWp system with a 9.6 kWh battery storage for 26,000 euros including installation. What do you think?
Should I perhaps look separately for cheaper alternatives?
Or do the advantages like coordination, scaffolding access, and warranty coverage that come with buying through the prefab house builder outweigh this?
Best regards
B
Buchsbaum06620 May 2024 19:42First, spend some time learning about photovoltaic systems. This is definitely the most sensible approach since you are planning everything yourself in a rough manner. This way, you will become familiar with the system and will be in control of your installation.
Once you know everything, you can order the modules, a few rails, and the cables. When the roofer comes, I would have them install the mounting rails immediately. Ideally, run an empty conduit from the house to the garage. Install the inverter and storage unit there, and when the electrician comes, have them make the connections in the meter cabinet. They should ideally also handle the registration with the grid operator.
Since the tradespeople will already be on-site, they can take care of this as well—of course, for a fee. You should be able to realize the photovoltaic system for roughly half the usual price or even less.
Go for a Huawei system. It is affordable, very good quality, offers good support, and there are no problems with registration because all certificates are available.
The choice of modules doesn’t really matter. Trina or other Chinese brands are now practically given away. You can still purchase the inverter and storage without value-added tax.
Once you know everything, you can order the modules, a few rails, and the cables. When the roofer comes, I would have them install the mounting rails immediately. Ideally, run an empty conduit from the house to the garage. Install the inverter and storage unit there, and when the electrician comes, have them make the connections in the meter cabinet. They should ideally also handle the registration with the grid operator.
Since the tradespeople will already be on-site, they can take care of this as well—of course, for a fee. You should be able to realize the photovoltaic system for roughly half the usual price or even less.
Go for a Huawei system. It is affordable, very good quality, offers good support, and there are no problems with registration because all certificates are available.
The choice of modules doesn’t really matter. Trina or other Chinese brands are now practically given away. You can still purchase the inverter and storage without value-added tax.
M
MachsSelbst20 May 2024 20:54Romeostar schrieb:
At least they did not take into account demand, consumption patterns, roof orientation, etc. Probably only the roof area. Although opinions differ when it comes to sizing... 10 kWp is a safe size.No, no, you misunderstood. It’s not about your demand, but simply about the naive calculation that you should put as much photovoltaic capacity on the roof as possible because it becomes "cheaper" per kWp that way.
Who wouldn’t buy 100 screws for $11.99 if they only need one that would cost $1 each? The screw is cheaper per piece, but you still pay $10.99 more for 99 screws you don’t need.
Especially since the investment is financed at 4%. If you have the cash, investing in lots of solar panels can make sense. Financed at 4% over 20 years... not so much. Especially if you put 20 kWp on a single-family house roof and then feed 80-90% back into the grid almost for free...
Romeostar schrieb:
It seems a bit expensive to me to buy a 10 kWp system with a 9.6 kWh (9.6 kWh) battery storage for 26,000 euros including installation. What do you think? Last year, I had a system with the same specifications installed on my roof for 18,000 euros. At the moment, depending on which manufacturers/components you choose, you can get it a few thousand euros cheaper.
Make sure to have your builder install a conduit. For the system, get quotes and have it properly sized.
N
nordanney20 May 2024 23:50Rough calculation: Basically, a storage system only makes sense if the cost per kWh of storage capacity does not exceed €300 (about $320). This is a realistic rule of thumb for the average photovoltaic system builder/user. Otherwise, the electricity from the storage becomes simply too expensive.
For example, 10 kWp (kilowatt peak) at €1,100 (about $1,170) per kWp + 10 kWh (kilowatt hours) storage for €3,000 (about $3,200) = system price of €14,000 (about $15,000) (this is a very affordable price), realistically more like €16,000 to €18,000 (about $17,000 to $19,500) on the market.
@Romeostar: Private message didn’t go through. Check out PVAndyE. They will help you. You wanted a puzzle anyway.
For example, 10 kWp (kilowatt peak) at €1,100 (about $1,170) per kWp + 10 kWh (kilowatt hours) storage for €3,000 (about $3,200) = system price of €14,000 (about $15,000) (this is a very affordable price), realistically more like €16,000 to €18,000 (about $17,000 to $19,500) on the market.
@Romeostar: Private message didn’t go through. Check out PVAndyE. They will help you. You wanted a puzzle anyway.
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