ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Great data, I can’t compete with that. However, we had an average monthly temperature of just +0.54°C (own measurement every morning between 7 and 8 AM). On top of that, several days of snow and ice on the modules, brrrrrrrrrr 😡

Wow, there’s a lot going on here.

It’s May, and while something is growing, it’s much too late. I brought my orange tree back inside because we had frost at night. Unfortunately, the leaves have turned white.

April was too cold and too dry. The climate on this planet is crazy – honestly, I have a strange feeling about it.

Zaba12 schrieb:

For everyone interested, here is the total household energy consumption including heating, comfort power, and electric car for the entire month of April.
A total of 1.1 MWh was generated through the photovoltaic system.
The heating has been off for 1.5 weeks now 🙂

[ATTACH alt="4117D759-121B-40C6-8BB5-8C03D5FA9916.jpeg"]60899[/ATTACH]

You seem to have quite a lot of sunshine, but why you don’t need heating remains a mystery given the temperatures. We still have single-digit temperatures at night and it’s currently 12°C (54°F) outside. Of course, the heat pump will eventually kick in then...

No problem, it’s not a competition anyway.

Bookstar schrieb:

You seem to have quite a lot of sunshine, but why you don’t need heating remains a mystery at those temperatures. We still have single-digit temperatures at night, and right now it’s 12°C (54°F) outside. Of course, the heat pump kicks in eventually...

It was already the case in winter that the house had a lower heating demand compared to others here. But we’ve definitely noticed the last three days without real sunshine, since solar gain is our only heat source.

Deliverer schrieb:

No, storage systems are generally not recommended. They are economically unviable because they are still far too expensive (currently about a factor of 3 away from profitability) and environmentally unfavorable, since their production is complex and the amount of stored electricity PLUS the charging losses PLUS the operational losses are not available to the grid to replace coal-generated power.

Addendum (after my remark about the factor of 3 etc.):
Regarding the overall ecological calculation, I agree that not every storage system has a good environmental balance (similar to electric cars). This depends on the manufacturers and, on a higher level, on legislators.

Could the charging and operational losses (depending on the storage-inverter combination a few percent up to (rarely) double-digit percentages) not simply be combined and the focus placed on the additional loss in the chain photovoltaic -> battery -> AC after conversion compared to photovoltaic -> AC, since direct consumption is the normal case? So, if 5% more is lost because of the battery, that would be around 0.2 – 0.5 kWh, approximately 1–2% of the photovoltaic surplus during sunny conditions.

Regarding the avoidance of coal-fired electricity: What are the exact figures here? Large solar farms and still a significant portion of private existing systems do not use batteries at all; and private households can only store part of the electricity generated during sunshine—so they continue to feed a lot into the grid—while they do not require nighttime power (which still contains a large share of lignite and coal as seen in live data).

So, today marks the milestone. The first full 12 months with battery storage are complete.
Photovoltaic system: 8.67 kWp
Battery storage: 6.4 kW, since the end of March 8.98 kW
191 charge cycles
Out of the 2093 kWh grid consumption over the past 12 months, 1314 kWh grid consumption occurred in December/January due to the air-to-water heat pump.
The rest is shown in the screenshot: