Photovoltaics combined with electric underfloor heating (heating cables)

Hello
I am thinking about heating in my home 125m2
I have a question whether a 10kW photovoltaic will cover my demand for electricity, floor heating with a capacity of 13935W
I do not know the subject, so please be understanding. If you need any data, I will add it. Please help

inwestor w potrzebie wrote:

I am thinking about heating in my home 125m2

As I understand it, the house is carefully insulated?

inwestor w potrzebie wrote:

I have a question whether a 10kW photovoltaic will cover my demand for electricity, floor heating with a capacity of 13935W

What is your annual energy consumption? Are you an off grid solution? If yes then no, you certainly won't be able to heat your home with PV. But if you meant on-grid (i.e. connecting to the ZE grid and returning surplus to the grid as part of the so-called discounts, i.e. the possibility of consuming excess energy at a later time), then perhaps the PV installation could be configured so that it would satisfy your needs.

See for yourself on the pvmonitor how much energy the owners of installations with this power actually get.

inwestor w potrzebie wrote:

I have question if 10kW photovoltaics will cover my demand for electricity, floor heating with a capacity of 13935W

The dry comparison of the two powers shows that it will not meet the demand when loaded with maximum power.
In addition, the power of the photovoltaic is reported in full sunlight.
In practice, you will have real power in the range of 1-10 kW.

I think well insulated walls 24 ytong plus 20-25 styrofoam. 15 cm polystyrene per floor windows 7 chamber 3 panes

Added after 2 [minutes]:

This is how I would like to return the surplus to ZE and collect them in the winter

Added after 9 [minutes]:

I do not know what is the demand according to the project, the demand for heat is 70kwh but I do not believe it because there was much less insulation in the project than I did

It is real. Or at least the savings will be big, especially when you consider the comfort of electric heating.

vodiczka wrote:

inwestor w potrzebie wrote:

I have question if 10kW photovoltaics will cover my demand for electricity, floor heating with a capacity of 13935W

The dry comparison of the two powers shows that it will not meet the demand when loaded with maximum power.
In addition, the power of the photovoltaic is reported in full sunlight.
In practice, you will have real power in the range of 1-10 kW.

Ok, but it will never work, everything together would be intelligent underfloor heating control

inwestor w potrzebie wrote:

This is how I would like to return the surplus to ZE and collect them in the winter

Well, the simplified calculation says this: Every 1 kWp of a PV installation is capable of producing 1000 kWh of energy per year. A 10 kW plant will therefore produce some 10,000 kWh per year. In the discount system, you can receive 80% of what you have produced, i.e. in the worst case you have 8,000 kWh from PV (in practice it will be better because you will consume some of the power at once, so not all the energy produced will go to the grid).
Since you have, say, a demand of 50 kWh / m2 per year, this gives a total heat demand of about 6,250 kWh per year. So you have a few thousand kWh left for electricity to power household appliances & electronics. In an average household, electricity consumption is just a few thousand kWh per year, so it can be assumed that a 10 kWp photovoltaic installation would be able to meet your energy demand.

Thank you very much, I think I will be tempted by this solution