So 1.7chf each time you want to raclette...
Especially considering the batteries in these are usually good for about 1000 cycles...
Which is hardly an emergency situation.
My concern is keeping my heat pump functioning. I was, and still am, looking for wisdom from other EFers if one of these devices would suit my needs.
I have learned a great deal, and thank all the serious posters for their input.
For the rest, would you kindly read all the posts before you open your cakehole. Thank you.
What is the power consumption of your heat pump?
Without that, it's impossible to say whether it's suitable.
Well, domestic heat pumps use somewhere between just under 1kw/h to 2kw/h depending on how much work needs to be done - i.e. how cold, how big the area to be heated, how insulated, etc.
https://seize-sa.ch/la-consommation-…eur-en-detail/
If you have a modern electricity meter, turn the heat pump on and see the difference in the instant consumption rate. You can do this even with an old-fashioned disk meter with some patience 
Assuming an optimistic scenario (not too cold, well insulated small house, etc) with this device you may be able to power the heat pump for a few hours. In a pessimistic scenario, you will be able to run your heat pump for less than you can run the raclette oven.
The use that you can get from this battery for running the heat pump is minimal. If it’s so cold outside that you need to fork out 1.7k to to run your heating, 2kw stored won’t last enough.
And that’s not even considering all the wiring difficulties, and the additional cost that may bring
My point, earlier in the thread, was that even in a not-so-well insulated house, after the heating is turned off, you're still going to maintain heat for several hours or even a couple of days - including hot water.
This is a lot longer than the time the battery pack will provide power to run the heat pump.
Bowlie never came back to me on this point.
A long time ago I ran a computer centre in the Midlands.
It had a standby generator that automatically started up in the event of a power failure.
So one night we had a power cut and the generator worked fine until the police dragged me out of bed in the middle of the night to turn it off due to noise complaints.
I turned off our heating temporarily last week when it was @ 22C and forgot to turn it on again. It was over a week before the temperature dropped below 20C, of course, it is not yet really cold outside. I have an air filter/cleaner that measures the temperature of the air passing through so I have quite an accurate measure.
I was just reading again the presentation of the battery and this note caught my eye...
"Permet d’alimenter les appareils électroménagers tels que les réfrigérateurs et les sèche-linge" Really? Can't think of anything better for a rechargeable battery than to run your tumble dryer? Again.... I have no words....
But refrigerator and freezer? I can’t think of a better use.
That I agree. There can be other uses as well - communication equipment, monitoring devices, evacuation pumps, etc... The system can be useful in remote locations that do not have access to electricity (e.g. mountain cabin), together with solar panels and the other devices it can certainly be worth the investment for certain situations.
But for running a tumble dryer.... even if you are up the mountain and soaking wet, there are better solutions to dry your clothes...
LOL - I would have expected that in Switzerland, not in the UK. Never had challenges when we did DR tests (DC near birmingham); but then again, we powered up the generators only for a few minutes to ensure everything failed over properly.
The small 1-5kW generators (usually petrol) are incredibly quiet. The 3kW, I can run on the balcony of the first floor (or potentially loft), and you would struggle to hear it from the road.
They are typically used in villages at markets, where the stall has fish/meat and needs electricity.
This was also in Birmingham. Never did understand the noise complaints it was a turbine-powered generator that made no more noise than a jet plane taking off.
Not by any chance in Bournville? Potentially behind a nice smelling factory with an even nicer staff shop?
There are a lot of videos on YouTube on Ecoflow portable batteries; looks like a good solution for saving solar if you want set something up that doesn’t cost '000 and can move when you do. As for being a Chinese product, sure it is; but going to talk to a German and Swiss company that seem to do something similar that I hope aren’t just rebadging Chinese goods. Anybody any experiences in this field?
Heatpump usually have 400v 3phase.
You need a lot more than a 1600W portable battery for that.
Thx. I abandoned that idea a couple of years back.
Powerwall 3 can now do it in Germany.
Pretty cool.