Marvin

I my humble opinion, if this is the only 2 choices, this is the first time I have seen the decision about on or off grid be clearly off the grid, along with the quote.

Is that right? If they only use the positive cable to control the power, and the immersion has a thermostat in-built surely its just the same supply 2 different ways in, one way in or no way in? Perhaps I'm missing something. I can certainly switch my light on with power from 2 sources, so to speak.

Absolutely right, but if I understand correctly, we would need an effing big cable going all round the world to join us all up (is there enough copper on the planet??) I think the satellite beaming the sun to solar collectors during the night is a more realistic but equally mad idea.

Yes.. We use, at present, between 5 and 7 kWh a night between 10pm and 8 am. (about 5-10C over night). At the moment we only generate an average of 6 kWh a day spasmodically depending upon the weather. I will just go and see what we are using from the grid at the moment... were using about 25kWh a day. about 10 kWh a day on heating and hot water. I will monitor our night time use by taking reading when the sun first hits the panels until sun (when the thing gives up) and see what we are using.

We have all south roof with 5.12kWp We already heat water and use machines during day, we also charge car. I was suggesting more off grid rather than storing a little.

Hi @J1mbo I have not given this enough research, perhaps you could expand a little about what you have in mind and the benefit arrived form it? Or even point me to the information? Only since being on build hub have I realised and now implemented so many great energy saving (yes, with installation costs) systems.

I am waiting for batteries to improve before going there ....

Since 2017 the table 2.2.2 shows that the average house bill: Table 2.2.2 Average annual domestic standard electricity bills in cash based on consumption of 3,600kWh/year Figures in cash terms These bills are calculated assuming an annual consumption of 3,600 kWh. Figures are inclusive of VAT. Direct debit: England & Wales (pounds) 2017 577 2018 629 2019 683 2020 690 2021 748

Don't know you have to read the 100 pages of info...

looking at retail prices since 2010 the price of electricity has risen by 28% https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1005772/Electricity_since_1920.xls

Some phots would help....

Hi @zoothorn This same thing confused me but people on Build hub pointed out what was being said. From what I understand there are 2 possible items that could freeze: 1 The water in the the pipes that goes round the ASHP in the the building and back again, which can freeze just like a bucket of water in the garden. 2 When the temperature and humidity are "wrong" the cold air being produced by the ASHP can cause condensation on the grills which freezes because the outside temperature is so cold. My question is, which one is the problem?

Yes my brother used to use G plan but it's outdated now.

What we're you thinking of having the water flow to and from? Hot water tank ? Radiators? Underfloor heating? Water coils? Buffer tank?

Yes thanks for that. I had read it a couple of nights ago.

Understood. Was going too anyway but thanks for commenting.

I think the time taken to reach this sort of decision making is very wrong on so many levels. ☹

As I understand, our ASHP, buffer tank and emitters (radiators and water coils in the MVHR ducts) 3-pipe connection to the buffer tank system uses the volume of the buffer tank to add to the volume of the system to avoid short cycling of the ASHP. Any heat loss from our buffer tank is inside the thermal envelope and circulates through the building via the MVHR so for us no significant heat loss. (We have added additional insulation to the buffer tank though, to avoid condensation problems when in cooling mode.)

Hang on. An exposed pipe high up on the wall INSIDE? ?? WTF!

So what's the point of this pre-ducted flexi gas pipe then?

Thanks @Temp. If you can't used a ducted pipe in these circumstance then I wonder what the he'll you can use it for!

My brother-in-law was discussing trying to prepare for the gas pipework route for his new kitchen. This is the pipework after the gas meter. He tells me that he thought it could run under the suspended timber floor if he used Tracpipe is this right? He is concerned as the only way around the building otherwise would be along the external wall down the side path exposed to possible damage. What's the regs on this?

My brother-in-law was discussing trying to prepare for the gas pipework route for his new kitchen. This is the pipework after the gas meter. He tells me that he thought it could run under the suspended timber floor if he used Tracpipe is this right? He is concerned as the only way around the building otherwise would be along the external wall down the side path exposed to possible damage. What's the regs on this?

Yes. Glad to see my technical writing skills have improved.....

Running all 4 in the winter is quite interesting: PV generation: About a week with overcast skies and then a couple of days of sun. January is supposed to be the low point for PV generation. Based on the EU calculator we should produce about 180kWh in January. We measured 195 which is about 6.3kWh a day on average. However generation happened spasmodically along with the weather. For example 14kWh on a good day and 0.86kWh on a poor day. EV Having the electric car meant that on the few days in the month when the PV generation was over 2kW we charged the car. We use a 3kWh plug in charger. Even with a 5.12kW system on the roof at peak generation during January we only saw a top of about 3kW, so rather than waste (send to the grid) maybe a kW or two we charge the car when generating 2kW or more and reduce the overall cost of charging the car. We calculate that over a ten year period that 1kWh used will have cost us about 10p. Hot water: Most of the excess was captured in the hot water tank using the Solic 200 controller and a 1kW twenty seven inch immersion. Twice even reaching over 60C resetting the countdown timer designed to warn us when the tank has not been over 60C for more than 10 days. MVHR The MVHR is now running smoothly with all controls working. One of the interesting items is the water coils that have been installed in the air ducts. These have increased the inlet air temperature from 17C up to 25C depending on the heating water set temperature and flow rate through the coils. Quite nice to have warmer air into the rooms in winter. Can't wait to use them in summer when cooling the bungalow using the ASHP and powering the ASHP using the PV. ASHP: ASHP kWh use over January roughly 9kWh a day for 100m2 for average 20 C over 24 hours indoor temperature. Had to move the ambient temperature sensor on the ASHP the other day because it was exposed to direct sunlight and effecting the temperature compensating mode. If it wasn't for Build Hub and the helpful contributors I would have struggled with half of this..... Thanks to everyone on here who helps. Many people who are new to the idea of ASHPs will find this a good place to start. Good luck with your project. M