ᐅ Do photovoltaic systems and heat pumps share similar performance characteristics or operational experiences?
Created on: 9 Mar 2016 22:27
T
toxicmolotof
Hello dear forum members,
Since Monday afternoon, my photovoltaic system has been up and running, and I have to say... I can’t stop smiling.
Here are the details:
Today’s performance:
The gray line represents household consumption, the blue and red areas show production, where the blue part was self-consumed and the red part was sold.
You can clearly see the washing machine running in the morning, the regular starts of the heat pump, midday consumption, and even the not-so-optimally started dishwasher after 6 p.m.
For a (very good) day in March, I’m more than satisfied. The only thing is that the heat pump in the early morning isn’t yet running as efficiently as I’d like. But I guess only a battery would help with that, and that still seems uneconomical to me.
Since Monday afternoon, my photovoltaic system has been up and running, and I have to say... I can’t stop smiling.
Here are the details:
- 5.4 kWp (18 modules at 300 W each)
- Peak power limitation 70% soft
- Flat roof, mounting angle 10°
- Orientation southwest, about 45° off south
- Feed-in to household electricity including heat pump
- Surplus energy sale
- no battery storage
Today’s performance:
The gray line represents household consumption, the blue and red areas show production, where the blue part was self-consumed and the red part was sold.
You can clearly see the washing machine running in the morning, the regular starts of the heat pump, midday consumption, and even the not-so-optimally started dishwasher after 6 p.m.
For a (very good) day in March, I’m more than satisfied. The only thing is that the heat pump in the early morning isn’t yet running as efficiently as I’d like. But I guess only a battery would help with that, and that still seems uneconomical to me.
Yield 32,843 kWh * 0.165 Euro = 5,419 Euro
Taxes = (result - depreciation - expenses, etc.) * 0.35 -> (5,419 - 2,500 - 270) * 0.35 -> 5,419 - 927 - 270 = 4,222
Yield after taxes 4,222 Euro, excluding self-consumption of approximately another 800 Euro
In total, I end up with about 5,000 Euro.
And even if it takes 2 years longer, it’s still a profitable investment.
S
Sebastian793 Sep 2016 08:19Grym’s problem is that he only lives in his theoretical calculations, has no practical experience, and still wants to lecture those people.
Grym schrieb:
30 kWp x 950 kWh/kWp x 0.1231 Euro/kWh = 3,508.35 grossTom1607 schrieb:
yield 32,843 kWh * 0.165 Euro = 5,419€Well – @Grym and @Tom1607 are clearly using completely different values:
28,500 vs. 32,843 kWh
0.1231 EUR/kWh vs. 0.165 EUR/kWh
This alone explains the difference in calculations.
I assume that with this feed-in tariff, Tom installed the system sometime between 2012 and 2013.
However, @Tom1607: how can a 30 kWp system produce 32,800 kWh per year?
A 30 kWp system should produce about 30 x 1,000 kWh per year under optimal conditions, right? Or am I mistaken?
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