Can I operate an air conditioner with a balcony power plant?

  • Erstellt am 2025-07-12 15:07:15

frankmehlhop

2025-07-12 15:07:15
  • #1
Hello,
I want to install an air conditioner for heating and a [Balkonkraftwerk (Photovoltaic)] on my house.
I would like to know if I can operate this heating system at a lower power than it would normally consume.
For example:
The air conditioner actually consumes 800 W for heating.
The [Balkonkraftwerk] might currently provide 200 W.
Can I operate the air conditioner with the electricity (200 W) so that it runs at reduced power?
Or what would happen in such a case?
 

Asbestosteron

2025-07-12 15:19:53
  • #2
That would only work if you have a partial-load capable air conditioner (usually something like "Inverter" is written on it). For higher-quality split units from the last 5 years, this is now the majority. Cheaper or older devices cannot do this and only switch on or off ("hysteresis"). The balcony power plant would hardly help you in that case. However, whether your air conditioner can reduce power down to 200 W is doubtful. And anyway: How do you want to throttle it down to 200 W? Measure its power consumption.
 

Nida35a

2025-07-12 19:17:57
  • #3
Your balcony power plant produces about 800W in summer, supplying all consumers, and the missing power comes from the grid. In winter, for heating, the balcony PV might still produce 50 or 100W, the rest comes again from the grid. The small power plant provides maybe 5-20% of your electricity needs, don’t expect too much. For heating and cooling, you need a much larger photovoltaic system.
 

Jesse Custer

2025-07-13 10:30:37
  • #4
I believe there is a misunderstanding here:

The OP is trying, as I understand it, to connect an air conditioner almost directly to the balcony power plant without supplying it with grid electricity.

Based on my answer: yes, you can do that, but only with an inverter device that can be regulated accordingly and a battery connected in between that buffers the power (and must be strong enough to maintain the maximum output). Also, the air conditioner overall must not be too large, since you only have a balcony power plant.

Otherwise, the device will constantly switch on and off with every small cloud...

But as a starting point, an interesting idea...

However, if the "standard" operation of a balcony power plant is planned, this is irrelevant - the air conditioner will then simply get its power from the grid...
 

frankmehlhop

2025-07-13 20:02:38
  • #5
Thank you very much for the feedback! I would like to clarify something because I did not write it clearly before. As correctly wrote, I want to operate the heating without mains electricity from time to time. It is a weekend house, and I would like it to warm the house a little bit with "free" (own) electricity so that it is dry inside and possibly already slightly preheated before I arrive on the weekend. (provided it is not already 20°C inside).
 

Jesse Custer

2025-07-13 22:05:41
  • #6
Good - so I wasn’t off the mark after all.

However: I can’t imagine that working, because in that case the system would have to virtually "notice" "Ah! There’s enough juice now, I’ll switch myself on!"

Because:

- the whole place needs to have internet including Wi-Fi - otherwise it won’t work.
- the inverter of the balcony unit needs to have Wi-Fi (available, it’s actually almost standard now)
- the battery of the system switches automatically, so it doesn’t have to be switched specifically (that should exist too)
- the air conditioner can be turned on via Wi-Fi - and here’s the snag: it must not be negatively affected by the "hot" shutdown (i.e. stopping by "power loss").

Difficult.

Personally, I would make it easier: I would get an Anker Solix - it can handle more than 800 watts, the thing communicates quite extensively and can store a lot according to size.

Snag according to your idea: the system is not 100% "purely" solar-powered - the unit can’t automatically switch off, so you have to keep an eye on that yourself. On the other hand, you simply have so much energy that you can easily run a "real" air conditioner... the system itself communicates via Wi-Fi, then you just need a controllable air conditioner... should be doable...
 

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