Posted by: @jamespa

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According to the website the capacity is 40kWh, [....] Whilst charging plus heating you would be drawing 2.3+40/7 = 8kW

8kW is still less than an electric shower,
but drawing that 33A for 7 hours is hugely more significant of course.

And @wully also has a storage battery, of a capacity we don't yet know.

I would be very interested to understand how these technologies have been amalgamated to provide both steady heat and an affordable running cost.

Posted by: @jamespa

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Weight 375kg with an area 0.6mx0.6m is 1000kg/sq m, which well exceeds what I understand to be the typical design loading of between 1 and 2 kN/sq m

That weight loading is similar to that of my thermal store, which is positioned on an upstairs/suspended floor.

But then I'm in a 1930s farmhouse, with floor joists that were overspecc'd by today's standards.

I have a copy of the Span-Tables from Part-A of the Building Regs.
So if @wully would start his new topic (please!) then I can check what joist sizes would be suitable.
The usual trick is to add an additional joist between two existing ones.

Posted by: @transparent

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The usual trick is to add an additional joist between two existing ones.

Which in a flat (for which this might otherwise be ideal) you wont be able to do.

@jamespa Variation on ‘Naming of Parts’? 😉 Toodles.

Posted by: @transparent

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My comment about your 3ph requirement was related to you having two EVs.

I think we're a fairly typical 2 car (1 big & 1 small) family, and both cars only need charging once per week each, which means we rarely have both plugged in, and we can cope if a full charge is spread over several days. In the middle of winter we can pull 18kW overnight, with ZEB (9kW), Thermino (3kW) and Libbi (5kW) charging at the same time. Generally though the off-peak window is large enough that none of these devices are charging throughout, so we generally see 12kW maximum. 

Posted by: @jamespa

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According to the website the capacity is 40kWh, so assuming you have cheap electricity for 7 hrs per day and can both charge and heat simultaneously (can you?) its enough for a home with a loss of 2.3kW.  Whilst charging plus heating you would be drawing 2.3+40/7 = 8kW

I suspect that there are plenty of flats with <2.3kW loss, not least because flats have a small area of outside wall.  Weight 375kg with an area 0.6mx0.6m is 1000kg/sq m, which well exceeds what I understand to be the typical design loading of between 1 and 2 kN/sq m, thus probably not structurally suitable for a flat other than on a ground floor.

The ZEB charges at ~9kW so generally takes ~4 hours to fully charge, and after that the ZEB consumes ~25W when delivering heat. It is targeted at homes that use up to 12'000kWh or so of heat in a year, which tends to be smaller homes. Although they've also gone into larger well-insulated homes, and also those with a secondary heat source.

For an example of an apartment installation, check out this video of an installation in Nottingham:

Posted by: @transparent

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There soon will be...

... because we'd very happy if you would start one 😉 

Posted by: @toodles

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@wully Yes, by all means, start a topic as it will be of interest to many I feel sure

I've started a topic ( https://renewableheatinghub.co.uk/forums/unusual-heating-alteratives/heat-batteries/#post-49495) in the Heating Alternatives sub-forum.

Hello everyone. My partner and I recently had a Bosch Compress 5800i 5kW installed in our ground-floor flat in Edinburgh. Over the last couple of years I've been researching pretty much everything I can around heat pumps in an attempt to reduce the bills on our unexpectedly expensive new-build flat.

When we moved in we had underfloor heating throughout, coupled to an Earth Save Products Ecocent exhaust air hot water heat pump with an electric boiler added for 'backup'. We found the Ecocent incapable of handling the heating load in winter. From October to March we could only have any two of 'warm flat', 'hot showers', or 'reasonable costs' and if it got really cold it didn't matter what we did; it would always be expensive and we'd probably still be chilly. After a lot of research and communication with various professionals we elected to replace the electric boiler with a heat pump.

It's currently still early days, but things are looking good so far.

After seeing that our boiler was on it's way out I started investigating heat pumps ways to upgrade the heating setup in our 5 bed 1910s detached house.
It's been quite a journey, and last year I was really stressed by how many options there were, and not knowing what to do, so we started on a retrofit, and engaged a company with the hope that they'd help us with working out which of the innumerable options could wor, which were right for us, and help us navigate things like finding reliable suppliers etc...

Now thankfully at least we've not already had bad work done at least, but it's been about 11 months since we started talking to them, and so far we've had an MCS heat loss report, air permeability test, and one quote for a heatpump install, and that's pretty much it.

While I didn't expect the process to be really fast, we're kind of getting fed up with how it's not going 🙂

So I'm back to researching and finding out things for myself again, a year later 😅

Matt

@giryan - welcome to the forum. Yes it can seem rather overwhelming and very slow at times, but that is one of the area in which this forum can help. Read around a bit, and when you are ready, post some further details of your property (heat loss etc) and any questions you may have and I am sure you will get helpful responses.

It's also a good thing you have joined at this stage, before you start the installation, as you say far better than arriving here after a botched installation.   

Fully agree with @cathoderay.  My journey took 2 years due largely to issues with planning consent and I am grateful it did because, in that time, I learned enough from this forum to make it much more likely that I ended up with an installation to be happy with.  As it is I am pretty much delighted, so ask away having read a bit and told us a bit about the house etc nd you will get some helpful comments.

Long time listener and new to the forum. Currently using a combi but experimenting with low temp heating and looking at ways of improving my system.

im currently getting quotes for a heat pump and cylinder installation and very much into the technology now.

Posted by: @pipebaron

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Long time listener and new to the forum. Currently using a combi but experimenting with low temp heating and looking at ways of improving my system.

 

im currently getting quotes for a heat pump and cylinder installation and very much into the technology now.

 

 

Welcome.  Do feel free to start a new thread about your installation with any questions.  if you are at all unsure or anything looks or feels wrong with quotes you are receiving, its better to ask in advance than regret in arrears!