Evaluation of photovoltaic system offer with storage

Same Sungrow system including the storage. However, 24x 425 Trinasolar modules. All-in (including scaffolding etc) just under 19.5k euros.

Hello, thanks for your comments. I will try to compile and determine the consumption a bit, to what extent we can actually discharge the storage in the evening and at night. Of course, you have to keep in mind that the children are also growing, maybe eventually an electric car will come, and I cannot look into the future. Currently, it is certainly the case that we consume relatively little electricity and between 10 p.m. and 6 a.m. hardly use anything except the standard consumers. I just remembered: The heat pump can also cool in summer. Would that still be relevant? Although here too most of the consumption probably occurs during the day.

Same Sungrow system including the storage. However, 24x 425 Trinasolar modules. All-in (including scaffolding, etc.) just under 19.5k euros.

Thanks for the comparison

We have a 5kWh storage and rarely manage to fully empty it in the summer. And that is despite having a very high consumption due to a lot of technology like controlled ventilation, air-water heat pump, smart home, cameras, network technology, servers, and so on. All that stuff together already requires about 250W. But with a 5kWh storage you can last almost 20 hours, and even the nights in the deepest winter aren’t that long. So we have days in winter when the storage isn’t full and some nights in summer when it isn’t empty. This gets us to about 220 cycles per year. For us, the storage only pays off because it was almost free thanks to KFW40+. How Kati manages to empty her huge storage every day is still a mystery to me. Further questions/feedback regarding points mentioned by : - Hot water with heat pump: Should be a maximum of 2kWh per day and can also be nicely scheduled around midday instead of at night. - Gaming: What do your gaming PCs consume? A modern game console requires about 200W. + 100W TV. So if you play a few hours in the evening you won’t empty the storage either. For 4 hours that would be only about 1.2kWh. - Home office: For normal people, it ends when the sun goes down (except in winter, but then you can’t fill the storage anyway). - E-car: Especially when working from home, you of course charge during the day and not at night from the storage. - Do you have any charts showing when which consumers are active and what the base load is when gaming PCs and heat pump are not running?

How Kati manages to empty her huge storage every day is still a mystery to me.

Further questions/feedback on points mentioned by :
- Hot water with heat pump: Should be a maximum of 2kWh per day and can also be perfectly scheduled for midday instead of at night.
- Gaming: What do your gaming PCs consume? A current gaming console needs about 200W. + 100W TV. So if you play for a few hours in the evening, you won’t empty the storage either. So 4 hours would be just 1.2kWh.
- Home office: For normal people it ends when the sun goes down (except in winter, but then you can’t fill the storage anyway)
- E-car: Especially when working from home, you of course charge it during the day and not at night from the storage.
- Do you have any charts showing when which consumers are active and how high the base load is when gaming PCs and heat pump are not running?

- I am still waiting for a proper introduction to our heat pump systems from the sanitation department regarding hot water. We need the network module to connect the heat pump to the network; we’ll buy it when we have extra money. Currently, I’m still fishing in the dark with the heat pump. We will still switch off making hot water at night once I know how large our storage is, etc.
- Both gaming PCs have 650 and 700 watt power supplies, plus 4 monitors and various other small stuff in the office. These things run significantly longer than 4 hours a day.
- When the home office computers turn off, the private computers turn on. Something is always running. YouTube, news, eBay, emails, communication – everything runs on the PC for us. The TV is only on once a week in the evening.
- We charge the e-car during the day, of course.
- Base load at night is about 400-450 watts.

When I look at the live consumption in the evening (when the kids are in bed and we are at the computers) we already draw about 1500 W.

- We will still disable that the night system heats water when I know how big our storage tank is, etc.
- We charge the e-car during the day, of course.

That's already good!

- Both gaming PCs have 650 and 700 watt power supplies, plus 4 monitors and various other small stuff in the office. These things run significantly longer than 4 hours a day.
- When the home office computers go off, the private computers turn on. Something is always running. YT, news, eBay, mails, communication – everything runs through the PC for us. The TV is only on once a week in the evening.

Just because the power supplies can provide such peak loads doesn't mean they actually consume that much.
Especially for YT, news, and co., the consumption should be very low even with modern gaming PCs.
But it's quite astonishing that despite work, children, and a new house you can spend significantly more than four hours on it every day.

- Base load at night is about 400-450 watts.

That is really very, very much!
I would get an overview of what the consumers are.
It still doesn't harm the environment, unnecessarily heats the place, and ultimately also generates costs.

That's really, really a lot!
I would get an overview of what all the consumers are.
It still harms the environment, unnecessarily heats the place, and ultimately also generates costs.

What would be a normal value?
Maybe I overestimated a bit, I only looked at one night as an example. I think 350-400 is more realistic.
We just thought about what our consumers are at night. We actually shut down the PCs completely. I think this is the classic standby trap. We have a large house, accordingly many sockets with lots of stuff plugged in. The classics that come to mind: fridge, second fridge/freezer, 2x dishwasher, 4 monitors (they turn off by themselves, but probably standby), a few video game consoles, stereo system, a few Alexas, baby monitor, washing machine/dryer, network stuff in the utility room, child's night light - each of these individually is probably not worth mentioning, but if you add them all together + what I forgot, it adds up.

Edit: You can't even factor in the video game consoles yet, currently only the PS4 is connected. I also don't know what the heat pump consumes in summer mode. But the ventilation system probably also consumes a lot. I'm still missing the network connection; it's possible that it currently runs day and night without switching to a lower level.