BristolBill

I cannot comment on the other aspects without getting firmly out of my depth but fully agree with Jeremy here. Awning blinds just added to three velux in an extension are making the world of difference.

Of the many options I have the following: 1) an indirect coil to a system boiler that I try and avoid using to burn less gas. The tank has authority to control the call for heat. 2) an electric element also controlled by the tank. 3) an electric element linked to an eddi diverter. This is co-located with the other element. There is a third element at the bottom of the tank as an emergency standby. Unwired. As far as the tank is concerned the management of the 'hot layer' is independent of heating source. It just injects water from the bottom of the tank to grow the hot layer as you heat it. You can set the target temperature in the app. I currently have a target temp of 60°C. If the tank is being heated via the Eddi the cut off functions at about 75°C. Instead of a blending valve near the hot flow we have them where required elsewhere. Can catch out the unwary at the kitchen sink.

Yes. A 180l tank with an indirect coil and a PV element hooked up to an Eddi diverter. Had there been the space without knocking quite a few things around I'd have gone for a larger tank. That being said I have only been in trouble for a bath running cold once. We've used it in a few ways and am slowly refining what the lasting solutions will be. The following will be too interventionist for many and for me too in the longer term but right now I'm experimenting. First: Electrically heated only, after had made the wondrous decision that hot water and no heating was a suitable time to move back into a building site. No smart meter and thus no cheap rate at this point so, rather than heating a full tank, by checking the hot water contents indicator you could see if you had enough for the next draw. I do not recommend living this way but then we also had an 8m2 hole in the back of the house at the time so.. Second: Electrically heated overnight on Octopus Go tariff, typically to 100%. Set to maintain min 20 max 40% via the indirect coil through the expensive electric part of the day if we got down this far. Upped this to 50% after a few 'complaints'. The ability to select which sources should be used at which times is useful here. So if I see the tank is at 30% and want more for a longer shower I can press the button to select the desired percentage (in increments of 10). It will then trigger the heat source I have said should be used for that time period. Thirdly: Baby 2 imminent and thus hot water not being immediately available wasn't a player, Solution: Look at the weather forecast for the next day and either set it to charge to 100% overnight on the cheap rate or let the sun do its thing or a mixture of the two. Fortunately March and April this year were atypical British weather months so all well. Clearly it doesn't have the heat loss characteristics of the Sunamp but it does let you know where you stand with hot water availability and has a host of available measurements and options. Happy to answer any questions (if I know the answers) but please accept my apologies for any delay as a newborn is running the show.

Hi everyone, a quick intro to say hello. More a renovator than a self builder and very much at the end of a project to make an 1870s Bristol house suitable to keep us here for at least the next ten years with a growing family. With a 2 year old and a now a two week old I had as an objective to reduce the carbon footprint of our energy use. The project was principally a single story extension to make a kitchen diner in addition to various changes to other rooms such as a bathroom with some walls coming out in the process. The opportunity was there to move the boiler and having had one too many showers turn cold with another tap being used, I decided it was worth doing something to the water system in toto. This is where I owe this forum and certain contributors a huge thank you as I learnt a great deal from them whilst trying to decide where to go with the spec although it didn't quite follow the original plan. The house is a narrow terrace with a couple of rooms on each of three floors and is topped off with a butterfly roof so less than ideal for solar. So why join the forum now? Well the principle threads I followed were around hot water and we've ended up with a 4kw array on the more favourable pitch, a Powerwall 2, and a Mixergy tank. This last part I see mentioned here quite a bit so wanted to offer a bit of user feedback to those considering one if that might be useful. There was much to'ing and fro'ing before arriving at this setup and the original intent had been a Sunamp Uniq 9 or larger. Various things conspired to drive the spec as it stands and we're only in the first few months of use. Very much learning as we go. I hope this finds everyone well in these times. Best, Billy