ᐅ €1483 per kWp | Canadian Solar 11.48 kWp system with SMA inverter

274 full cycles, which use case do you want to achieve with that?

Your system is already quite large, but how do you plan to fully drain the battery overnight during the summer? I don’t even consume 12-13 kWh at -5°C (23°F) in winter nights with a heat pump and ventilation system.

We currently have an average daily consumption of 20 kWh (kilowatt-hours) during winter. When we are not home, for example, away for the weekend, it drops to about 16 kWh.

In summer, the consumption increases a bit due to additional loads like air conditioning and the pool. It tends to be even higher because we will remove the solar thermal system and use the surplus electricity during the day to heat the water.

By the way, we do not have a heat pump or an electric car.

Even with our relatively high consumption, a storage battery is not cost-effective unless its price drops by about half or electricity prices rise significantly.

P.S. With a 7.7 kWh (kilowatt-hour) battery, we are exceeding 300 full cycles.

Yes, according to some calculators. Unfortunately, reality is somewhat different.

Even with your large system, you will have many days from mid-November to the end of February/early March where you will be glad to get a total of 4–5 kWh per day from the roof.

Dogma schrieb:

It should be around 5.6 years. For €10,000 (about $10,700), it’s 10.1 years. The cycles mentioned come from my planned system with approximately 29kWh (29,000Wh). But the biggest factors are the price and/or the electricity cost.
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12.8kWh (12,800Wh) for €5,000 (about $5,350), where exactly?
You can’t even get the materials for that, plus the inverter and connection...
Then 274 full cycles, how do you expect to achieve that?
Using an electric heating element to heat water at night is not a practical use case for energy storage. ;-)

halmi schrieb:

Yes, according to some calculators. Unfortunately, the reality looks a bit different.

Even with your large system, there will be many days from mid-November to the end of February/early March when you’ll be glad to get a total of 4-5 kWh per day from the roof.

That’s nonsense. I myself generated 300 kWh in December with my 10 kWp system, which averages to about 10 kWh per day. There were even several days when the system produced over 30 kWh.
You can figure out what that would mean if I had a system 2.5 times larger.

DaGoodness schrieb:

That’s nonsense. I generated 300kWh myself in December with my 10kWp system. That’s an average of 10kWh per day. There were even several days when the system produced over 30kWh.
You can imagine what that would mean if I had a system two and a half times larger.

Average values don’t apply here.
I also generated almost 300kWh in December, but only over 6 days. On the other 25 days, there was rarely more than 5kWh produced, which of course was used immediately without going through the battery!

You should really check your data again. 😉