dpmiller

Chinesium hot water tap is tankless, but how about just putting a drain-down valve on the supply so you can isolate and drain down the line between occasional uses in cold weather?

@ProDave sorry if I missed it but have you tried the head office in Austria?

@ProDave here's some blurb from Honeywell- https://youlearn.honeywellhome.com/uploads/documents/FAQ_-_Optimisation.pdf

It's like the "optimum start" feature on some older digital roomstats- they learn the rate-of-change of the room/house and re-start from the setback temp in time to have regained temperature at a selected time. The lower the internal temp falls overnight, the earlier the heat comes on. but as @Marvin alludes, how much of a point there is to this in a well-insulated property with an ASHP, is questionable

@vala no, the boiler stat is a final protective really, the buffer controls should be doing the work. If the house is being heated well in all situations you might consider having a smaller jet fitted to the boiler to reduce it's capacity a bit?

turn it up a bit.

yes. boiler stats tend to have quite a wide hysteresis so if it's clicked off, the water could need to drop 5-15C before the boiler will cut in again

will the microinverters play nice with the gennie or will their smoke leak out?

ours has been off for a number of hours (3-12) three times since we got the mains connected.

Surely the boiler stat has the veto here?

I note that the comments negating the likelihood of outages *aren't* coming from folk that live out in the sticks where power is HV *and* LV overhead...

I've a number of Hoymiles microinverters and the required wifi bridge. Setting up the account was a bit of a faff (as I was the "installer" as well as the "user") but the App itself is great, I really can't ccmplain.

why is the RHI so important?

Something must've changed over the years- 3-bar electric fires and various other 3kW heaters also used to work off a plug just fine back in the day, but nowadays a 2.5kW tumbledryer overheat a plug. And don't start me on 3kW elements in Water stills that run all day long, on a 13A plug...

@Nickfromwales why would it be Solaredge if he's got Tigo smart panels?

I'm intrigued by the other unnecessary gizmo in the loft- was it a WIFI bridge for monitoring? With some systems it's a mandatory requirement for G9x compliance... You still haven't told us what inverter you have.

continuously lit or PIR? There are chinesium solar floods that can be wall or pole mounted, I've one of these on the corner of the house and it's very impressive https://www.ebay.co.uk/itm/233670054949

It definitely has a moving part, and... how can the COP be greater than 1?

can someone educate me what "this kind of interior" is please?

@vala you might try doing both tbh.

so they should be cheaper as their own brand then

never heard of them.

try it on 2...

it's more a groundworker thing than a plumber thing, if you ask me

That reads very expensive...