ᐅ Single-family home photovoltaic system with 30 kW capacity
Created on: 16 Sep 2024 16:10
B
brandner1860
Hello everyone,
Due to the current low prices of photovoltaic modules, I would like to purchase the photovoltaic panels, mounting system, inverter, and battery storage in advance.
Key details:
Single-family house in the district of Altötting, 2 adults, 2 children
Roof orientation: North/South
Roof area: 13.5 m x 6.7 m (44.3 ft x 22 ft)
Photovoltaic module size: 1.69 m x 1.0 m (5.5 ft x 3.3 ft)
=> 3 rows with 12 modules each => 36 modules per side
36 modules on the west side and 36 modules on the east side
Therefore, I plan to buy 72 modules (410 W each) in advance.
This results in approximately 30 kW.
The heating system is planned to be a heat pump with a hot water storage tank.
I estimate the annual consumption to be 4.5 kW because I also want to install 2 or 3 split air conditioning units.
My questions are:
Do you think 30 kW is oversized?
What size battery storage would you recommend?
Which inverter would you suggest?
Thank you in advance.
Due to the current low prices of photovoltaic modules, I would like to purchase the photovoltaic panels, mounting system, inverter, and battery storage in advance.
Key details:
Single-family house in the district of Altötting, 2 adults, 2 children
Roof orientation: North/South
Roof area: 13.5 m x 6.7 m (44.3 ft x 22 ft)
Photovoltaic module size: 1.69 m x 1.0 m (5.5 ft x 3.3 ft)
=> 3 rows with 12 modules each => 36 modules per side
36 modules on the west side and 36 modules on the east side
Therefore, I plan to buy 72 modules (410 W each) in advance.
This results in approximately 30 kW.
The heating system is planned to be a heat pump with a hot water storage tank.
I estimate the annual consumption to be 4.5 kW because I also want to install 2 or 3 split air conditioning units.
My questions are:
Do you think 30 kW is oversized?
What size battery storage would you recommend?
Which inverter would you suggest?
Thank you in advance.
I also have a north/south roof with a 22° pitch. Both sides are fully covered, totaling 20.5 kWp. I would avoid any optimizers if the roof is free of shading.
I believe there are different regulations in the Renewable Energy Act starting from 30 kWp. It might be better to stay just under that threshold.
I believe there are different regulations in the Renewable Energy Act starting from 30 kWp. It might be better to stay just under that threshold.
Alex124 schrieb:
A quick tip: since last year, I believe, there are certain requirements from grid operators to install a disconnection device for systems with 25 kW or more. This allows them to prevent injection into the grid, for example, during peak summer times when too much power is fed in. Just the components alone cost roughly 1000 € (around 1,100 USD) when I checked, and you also need space in the cabinet. So the question is whether it makes sense to go above 25 kW... The use of a ripple control receiver is legally required for photovoltaic systems with an installed capacity of 25 kWp or more. This regulation aims to ensure efficient and demand-oriented management of larger photovoltaic systems. Additionally, the legal requirement from 25 kWp onwards allows grid operators to regulate the output of photovoltaic systems via digital radio signals to maintain a stable and secure grid feed-in.
B
Buchsbaum06617 Sep 2024 09:41Alex124 schrieb:
Additionally, the legal requirement from 25 kWp ensures that grid operators can specifically regulate the output of photovoltaic systems via digital radio signals, Do I want the grid operator to control my photovoltaic system? Not at all.
So, I would keep it below 25 kWp.
B
brandner186018 Sep 2024 09:23Thank you very much for your numerous replies. I think I will stay below 25 kWp. Can you recommend a battery storage system?
I am planning to get the following inverters:
Huawei SUN2000-10KTL-M1 (15 kWp) and SUN2000-6KTL-M1 (9 kWp) hybrid inverters, high current version.
I am planning to get the following inverters:
Huawei SUN2000-10KTL-M1 (15 kWp) and SUN2000-6KTL-M1 (9 kWp) hybrid inverters, high current version.
I have installed Solis inverters and Pylontech batteries in my photovoltaic system (17.5 kWp & 10.5 kWh). If I were to set up another photovoltaic system, I would choose Huawei entirely (Sun + Luna), as everything works perfectly together and you don’t have to manually enter battery parameters into the inverter, which can be quite annoying. It took a while to get everything properly adjusted.
B
Buchsbaum06618 Sep 2024 10:20You cannot connect other storage devices if you want to use the inverter from Huawei. In that case, it basically only works with Huawei storage.
Anything else will cause unpredictable problems. As mentioned above, the Huawei system works perfectly together.
Anything else will cause unpredictable problems. As mentioned above, the Huawei system works perfectly together.
Similar topics