Marvin

Plus 1 Typical low flow shower 12 litres per minute. How do you cope??? As for upgrading the mains... it depends what is in it. You have the flow and the pressure. If you increased the size of your supply pipe to your home the flow could increase if the pipe restricted the flow. However, it would not increase the pressure as this is controlled by the water company supplying the water in your area. I would suggest contacting your water company to ask them about what could work for your home. ( it could be you are a very long way away from a main...) Secondly I would ask your neighbours what sort of set up they have. (i.e. are you the only one with a poor flow rate). Good luck. Marvin

Try reading pages 61,62 and 68 for info. https://forum.buildhub.org.uk/applications/core/interface/file/attachment.php?id=50188

For me, this is a little confusing. Low loss headers will, as I understand it, allow circulation of the water even when the radiators have turned themselves off (assuming thermostatic radiator valves are used) however, modulation as I understand it, is the turning on and off of the heating (in this case) to meet demand. It is known that an air to water ASHP should run for at least 10 minutes before stopping to achieve the best COP result. Having an ASHP and radiators myself I was advised that the water in the buffer tank adds to the system volume thereby acting as a storage so when the cold water returning from the radiators is added the buffer water temperature slowly lowers delaying the ASHP kicking in. Like wise having the buffer means that heating up requires longer therefore aiding the COP.

How many chimneys does the cottage have?

Yes, they are due round. Paid my £360 for that. Positions of isolators as submitted in application....

I think I will label that up to remind me. Its always months/ years later that you come back to do something...

Yes the maximum the inverter will take. It also allows room for me to fix extra panels to the chimney..

Yes, perhaps proper function but form needs improvement.

Hi @mrbd Yes it looks worse than it is. The top DC isolator isolates string one only and the lower one isolates string 2 only. Here's the mathematics. The percentages are related to the inverter maximums: Set up Quant Watts Longi 320 watt panel 1 320 Watts amount of panels 16 5,120 Watts 85% Inverter Max 1 6,000 Watts DC isolator max amperage String wattages String 1 7 2,240 Watts 56% 7.84 String 2 panels 9 2,880 Watts 72% 7.84 Maximum string 4,000 Watts Panel voltage panels 41 Volts String 1 panels 7 286 Volts 48% String 2 panels 9 367 Volts 61% Maximum string Voltage 600 Volts

Gravity?

Am I done?

Forgot to stick on labels.....

Am I done?

You have @SteamyTea to thank for sharing the report.

Yes. I think that anyone who's thinking of ASHP should read it. Fortunately our installation follows the recommendations, and now we're fine tuning the set up.

What is the floor constructed of?

In our neighbourhood, for some reason, our PV seems to be producing power even in the night.... 20211214_225256.mp4

Well, I think you should read pages 62 63 and 68 of this report. It will give you some understanding. https://forum.buildhub.org.uk/applications/core/interface/file/attachment.php?id=50188 Good luck Marvin

Will you have Thermostatic Radiator Valves? Do you expect to use a Buffer tank?

Will this help? https://www.british-gypsum.com/specification/white-book-specification-selector/internal-partitions-walls

Hi @SuperPav. We have had no issues. No problem with sound or vibration. We have to consider our flat roof because it has 200mm of insulation sandwiched between two sheets of OSB with EDPM on top. The 80kg ASHP unit may be able to compress the Celotex insulation and cause a problem, we will find out. Good luck with your design Marvin

I have just crossed wooly tie off my Christmas list.

Watch out for the technical details on the RCBO. Mine had to be 0.1amp

All I know is it works like that. I think you can put the inverter and RCBO before any load. So both in the garage before connecting to the house cables. You need to check what your equipment says is required. The RCBO requirement was a real bind.