Thanks for that Nick.
In place right now:
Saunier Duval F35E gas boiler - pre-retrofit combi connected to retrofit UFH 200mm concrete with 70mm tiled screed
7.5 kW PV diverting by 2 Immersuns. Immersun1 to 200L DHW direct tank1 with top and bottom immersions. Immersun2 to 200L indirect DHW tank2 with bottom immersion (original pre-retrofit tank still connected to boiler). The two tanks are connected serially. Tank1 top immersion is on time switch - the other two taking from the Immersuns. All unvented.
EV for local trips 5,000 km/year drawing from wall charger.
Attached 2017 energy report
She Indoors is hobby user of all types of washing machines (3 clothes washing machines, 2 clothes dryers, 2 floor washing machines) - compared to 1 shaver. She often uses 50kWh/day.
Pre-purchased Daiken indoor wall-hung hydrobox EHBH16CB3V, user interface EKRUCBL2C, hot water cylinder EKHWS(U)200A3VB - all new kit from discontinued project, but no warranty I expect. This kit can be matched with 11kW, 14kW or 16kW outdoor unit. HWC has an indirect coil and heater.
Present tense - see above
I understand. My question related to possible power vagaries if feeding HP directly from battery storage.
Good. Unvented, so leave existing DHW set-up. Install new diverter switch configured for car (Zappi?) - car is at home during day. Dont consider off-peak until get better handle how to get to zero on meter with flexible diverting.
Mother-in-law (nice lady) standing in 20 degrees in front of HR outlet delivering 12 degrees declares to all and sundry 'this is air-conditioning making us cold'. Instructs daughter to switch off system and open windows to get 'fresh air' (uncontrolled and unfiltered) at 6 degrees.
Yes, time was good few years ago to install PV, now good time for HP, but not yet for PV Storage. Look forward to hearing about your progress.
I lost that battle - now they just say no need for heating, and by definition HR.
65% of floors (all GF) is 270mm tiled concrete. I prefer to wait for better batteries (not bring in Sunamp) and stay with that. Might try positioning outdoor unit under a bedroom window.
Yes. I grew up in a house with an open fire. Our parents and grandparents got by ok with woollen sweaters. All this kit is a madness, as you said - but passive-standard building envelope is not.
Yes, got all that. Will install HP next month leaving flexibility regarding DHW - then wait and watch for a year. There has to be a next stage with more PV and storage - see attached import/export balance.
Just wave to us minions as you pass.Scan 2018-8-20 15.23.55.pdf