Marvin

Hi @RussH and welcome. After 2 years of finishing your build, you will think, ah it was not that bad. Until then it can be a challange. Just remember, the only stupid question is the one you never asked. Good luck M

Our ASHP is set at 45°C. The PV diverter is set at 75°C at the moment. I ensure that the temp goes up to 60 every few weeks in the winter by overriding the diverter.

Hi @Rob99 You may wish to consider balancing your storage and your PV supply and your home demand. We have a small amount of batteries for night use because we charge the car and heat the water and have ASHP. So in the summer we have more than we can use when the sun is out, and not enough in the winter. We achieve about 4 to 1 summer to winter average daily output. You could have a huge battery bank, but what are you going to use it on and remember that you loose about 18% converting from DC to AC.. During the summer nights we use about 2 to 3kWh and in the winter the PV is almost all used up on the ASHP, and car.. Good luck M

Only if the converted DC power goes through the same inverter as the panel DC. If you have another inverter for the battery power which connects directly to the mains, then you need to add the maximum kWs output of that device and the PV inverter max kWs together and speak to the DNO. M

Our 6kW inverter can have almost 8kW of panels connected and the DNO don't care because the inverter will only allow a 6kW output. I would check with the DNO. . M

Was informed by the DNO that they didn't care what I could limit the inverter to. If it was a 6kW inverter, that is what I had to have permission for! Best check assumption with you DNO. M.

Well, having previously completed a review of the areas of the most yearly rainfall in England I note that Dartmoor was high on the list! Pity the water companies haven't found a way to store that lot!

Perhaps the surface is slightly dusty??

Hi @Super_Paulie Hello from down south. Marvin

the first two parts in your diagram just pull upward

You don't even have to take it apart to plunge it. its just a standard shower trap.

I think it will be the waste pipe from the shower trap to the external soil stack has not enough fall on it. Typically the ones I am asked to sort out have been put in with the pipe too level or going uphill, elbows rather than swept bends, and unsupported pipes that sag. If the trap is removable then plunging is a good start. M

I bet the trees were cheaper to buy 20 years ago!

Interesting. I will have to upload my calculations to find where I have gone wrong. M

I'm quite surprised by this. I will have to check my calculations. I had calculated a saving in winter for heating and a saving in summer for cooling....

Hi @pepelepeu I think it should be open. That is the black valve on the left ( I assume there are 2 valves and not just a bad photo).

Hi @pepelepeu Judging from my experience the Expansion vessel is not working properly. Our ASHP system runs at 2 bar so the red line is about right. Is the valve on the pipework which allows the pressure to expand the vessel OPEN? looks closed to me. That's the one to the left of the PRV in your photo. Should it not be like this? and not this Good luck Marvin

Hi @Adrian_london Only a Typo! kWs Kilowatts M

Hi @Adrian_london I'm trying to understand the maths.... what amount of KWs in total are your panels?? Do you have an 8kW system?? Having PV and ASHP is always better than just one or the other.

Hi @pepelepeu Yes, a bit of grit or a frequent flow of water out of the overflow can scale the PRV components. As the water in your system heats up it expands and need somewhere to go otherwise the pressure will rise and water will be released by the PRV. When the water temperature reduces and the volume of the water shrinks the correct pressure will be lost. Now you have to fill it up again... When filling up the system to the correct pressure does the pressure gauge rise quickly to the correct pressure or slowly? The reason I asked is because the top of the pressure vessel needs to be pressurised, by pumping air in, to the level required to work properly. If the air pressure is too low the expansion tank will fill up the available space for expansion (the resistance to pressure being so low) when setting the water pressure side. If the pressure is too high the pressure vessel will not allow any room for expansion before the pressure forces the water through the PRV. Worth checking the settings. Good luck Marvin

Met office show snow for the highlands today...

We're trying our best. We are using a PV diverter to the hot water tank which is at 75C to last 2-3 days. We have about 40W PV installed per m2 floor.

As my brother says if your paying the money you make the choice!

Quote: Section 75 protection if you pay a deposit by credit card You don’t need to pay the full price by credit card to get section 75 protection. It’s enough to just pay the deposit to get you the legal protection. For example, if you bought something costing £200 but paid a deposit of £20 on your credit card and the rest by other means (eg via debit card or cash) you’d still be covered and you would be able to claim the whole £200 (and not just the deposit) from your credit card company if the goods didn’t arrive or were faulty. You can also make a claim for more than just the price of the items. For example, if you could claim from the supplier for additional expenses (such as postage) or consequential losses (such as damage caused by a faulty item), then you can also make a section 75 claim for these with your credit card company.

Hi @Chanmenie This might help: https://www.moneyhelper.org.uk/en/everyday-money/credit-and-purchases/how-youre-protected-when-you-pay-by-card