dpmiller

somewhere around 1.5kWh for a reheat back to 54c

I've sensors top, middle, and bottom of the tank. The coil and both upper and lower immersions reside below the middle sensor, and this is the sensor for ASHP control. It doesn't respond meaningfully to the convective flow past it, only rising when the HW level is right down on it and the heat pump will then cut out. At this stage the top of the tank will be a few degrees higher, approaching the flow temperature.

Not so many of them, this wee side of the Pond

it's the amount of export that makes the voltage rise, regardless of how many inverters you have. Inverters work by pushing power into the house and grid. More production, less load in the house, and poor DNO infrastructure all have the same effect- to make local grid voltage rise.

that's interesting. As the iBoost's tiny fan runs during all diversion they've definitely done something. Mahoosive heatsink maybe...

umm, do you realise just how heavy a Sunamp is?

yes! make it even harder to install!

yep we've some like that and it looks grand.

Any chance of an audio clip of the fan sometime please and pics of same? We've an iBoost and the tiny fan in it is a. noisy and b. only barely copes with the heat. The CE unit looks like a virtual clone of the iBoost except for the case being bigger so I wonder if they've improved the cooling

Yep, I did and for the reasons above.

For the short time an extraction hood is *actually* needed, some of us are happy to put up with this "loss of benefit". After all, we each live in a home, not a showhouse. / run-of-the-mill cooking like a wee bit of steam coming off your pot of spuds is dealt with just fine by MVHR with the extract placed in the vicinity of the cooker. But burn the toast or fancy a bit of stir-fry? I'll vent that out urgently thankyouverymuch.

yep, that should be fine

ah but is the PB skimmed or tape&fill?

what age is this "kid"?

surely the whole point of beads is that moisture *won't* cross them...

need to read the rating plate on the motor to confirm the voltage.

^ don't discount how strong and turbulent the convection currents will be inside the tank with the heat rising off the coils...

what *is* the comparative cost then?

Is there a pole transformer or a "substation" in the vicinity?

the base of the tank sits around or just below flow temperature.

TS has a 3m2 ASHP coil in the bottom third and a DHW coil in the upper third, roughly. Flow from the ASHP passes through the bottom coil at all times except if cooling is required, when it's bypassed using a 3-port valve. I'd originally done this to enable blending of HP and buffer volume in parallel but that's never actually needed. 2-port zone valves divert the flow out of the coil to the manifolds and if neither manifold is calling, an auto bypass valve sends all flow to return The boiler stove is plumbed direct to the TS (through a laddomat-style anticondensation valve.

Yes, DHW priority like any other ASHP flow temp during DHW is controlled by the ASHP using it's own deltaT curve It's a World Heat TS with a standard 3m2 coil and two immersions both on PV via an iBoost but... All heating flow also passes through the TS so the TS acts as a buffer volume. Heating flow (UFH *and* rads) is about 42c, the tank is never cold... And this means I can heat the whole house off the immersion heater *or* the boiler stove, as a failsafe

I've two pockets but they aren't really far enough apart. One just above the coil, about 2/5 up, the other halfway. I'm using the upper one. Hysteresis is 1.5c plus an overshoot of 0.5 (overshoot give the inverter a chance to ramp down rather than turning off) Tank setpoint varies by time but is between 50 and 54, but the top of the tank tends to end up 3c or so above setpoint

TS works fine for us with the ASHP but sensor pocket position and hysteresis setting is critical, as well as minimising the time it takes for the HP to ramp up towards full power. Which means plenty of flow and the flow modulated by the HP...

Ummm, all fibre round here is overhead.