ᐅ Photovoltaic System: How Many kWp Are Sufficient for a House?
Created on: 19 Mar 2020 09:10
L
lin0r87
Hello everyone!
We are building a semi-detached house and want to install a photovoltaic system on the roof. The orientation would be south/west and north/east. We intend to use most of the electricity ourselves. A battery is not planned, as the cost is quite high for such a system and it probably doesn’t make financial sense.
We have received an offer that includes:
- 14x IBC MonoSol 360 (there is still space on the north/east side... does that make sense?)
- SMA SB 3.6-1AV-40 inverter
- DEHNcube YPV SCI 2MPP surge protection device
- Meter cabinet (+ accessories)
- Installation
The price is about 7,500€ gross.
The system will have a capacity of 5.04 kWp.
Currently, there are three people living in the house (2 adults, 1 child). Four are planned.
Our roof is quite simple but well oriented.
We are wondering if 5.04 kWp is sufficient?
Our electricity consumption in the apartment was always below 3,500 kWh per year, but we expect it to increase with the house. We estimate about 4,500 kWh.
Regarding the 24/7 electrical loads:
There will be an air-to-water heat pump from Novelan and a ventilation system with heat recovery.
I would really appreciate some advice.
We are building a semi-detached house and want to install a photovoltaic system on the roof. The orientation would be south/west and north/east. We intend to use most of the electricity ourselves. A battery is not planned, as the cost is quite high for such a system and it probably doesn’t make financial sense.
We have received an offer that includes:
- 14x IBC MonoSol 360 (there is still space on the north/east side... does that make sense?)
- SMA SB 3.6-1AV-40 inverter
- DEHNcube YPV SCI 2MPP surge protection device
- Meter cabinet (+ accessories)
- Installation
The price is about 7,500€ gross.
The system will have a capacity of 5.04 kWp.
Currently, there are three people living in the house (2 adults, 1 child). Four are planned.
Our roof is quite simple but well oriented.
We are wondering if 5.04 kWp is sufficient?
Our electricity consumption in the apartment was always below 3,500 kWh per year, but we expect it to increase with the house. We estimate about 4,500 kWh.
Regarding the 24/7 electrical loads:
There will be an air-to-water heat pump from Novelan and a ventilation system with heat recovery.
I would really appreciate some advice.
Zaba12 schrieb:
I think 70% is quite a lot without storage. I can check tomorrow, but I think we might even be above that.
Tego12 schrieb:
I need that too, but unfortunately also a towing capacity of at least 1800 kg (4000 lbs) (horses....). :/ 750 kg (1650 lbs) would be enough for me, but neither the Ionic nor the Kona have towing capacity. Otherwise, those would be really good cars, especially the Ionic.
And with such a large photovoltaic system on the roof, refueling is almost free since you can mostly charge with solar power, plus the subsidy, 10 years tax exemption, and less maintenance compared to combustion engines. That would be great, but the towing capacity is missing.
Tego12 schrieb:
I also need one, but unfortunately with a minimum towing capacity of 1800kg (approximately 4000 lbs) because of the horses... :/So there really isn't any electric option yet, right? Horse trailers with their poor aerodynamics probably also reduce the range significantly...Specki schrieb:
I can check tomorrow, but I think we might even exceed that.
750 kg (1650 lbs) would be enough for me, but neither the Ioniq nor the Kona have a tow rating. Otherwise, they are really good cars, especially the Ioniq.In that case, you might also consider a Tesla Model 3.
Heidi1965 schrieb:
How large is the house? What is your annual electricity consumption?Just over 160 m2 (1,722 sq ft) plus basement. Electricity for the heat pump alone was about 3,200 kWh, and household usage was 2,400 kWh.S
Stefan8907 May 2020 23:06miho schrieb:
So, there really isn’t anything electric yet, is there? This could work with a Model X.Stefan890 schrieb:
A Model X could work for that.Indeed. I wasn’t even aware that it has a tow hitch and can tow that much...Similar topics