DamonHD

If the iBoost is set correctly (I have an Eddi so have more knobs to twist to make it work) then the battery will get in first anyway. Yes, AC-coupled is the way to go. Tell/ask the FiT administrator before doing it. Exports will go to deemed if not already so.

A large inverter will likely have higher overheads/losses at lower loads: probably don't size to cover your biggest load, but maybe 95% of the time. I have what is now a quite weedy inverter (~1.25kW, 6kWh) but only import/leak ~0.3kWh/d in summer, in part because low overnight loads are covered effectively.

Just in case anyone likes those "making of" backstories... https://www.earth.org.uk/pint-poster-paper-slice-and-dice-decarb.html

I suspect that non-ToU tariffs may become much more expensive, so those who pay no attention at all will pay a heavy premium; those who pay more attention will save (or earn) significantly.

Maybe. But things as simple as adjusting heating/water times and picking a suitable tariff is at the easy end for example.

New GB grid frequency response services, eg from batteries, are required to respond in a second or so: https://www.neso.energy/industry-information/balancing-services/frequency-response-services Linear frequency/power responses and a dead-band help prevent them making things worse. Millions of devices should avoid deliberately or accidentally synchronising to cause 'herding' effects: my own response mechanisms generally add at least some seconds' randomness before going on load or coming off a response to low frequency. The 10-minute randomisation for EV charging is another anti-herding design.

https://www.academia.edu/2998-3665/3/3/10.20935/AcadEnergy8514 Introduction: To eliminate the ~15% of UK greenhouse gas emissions due to home heating most will move to heat pumps by 2050. But electrifying heating will roughly double peak demand on the grid while green intermittent renewables such as wind and solar make available generation less predictable. Most of us will need to learn to flex our home space heat and hot water and other electricity demand else we will pay a high premium, but we do not all have to flex in the same ways at the same times to support the greening grid. Materials and methods: This study synthesises existing literature and first-hand observations from investment banking derivatives and the energy system, along with primary data from one UK home enumerating a number of viable techniques. Results: Static and dynamic demand-side flexibility responses, automated and manual, have visibly moved the case study home’s load profile away from that of a typical Great Britain (GB) household on winter weekdays when national demand is highest. Conclusions: A portfolio approach with a mixture of different grid flexibility responses across the housing stock, including those driven by Time-of-Use tariffs, can be a first-class contribution to Net Zero.

All heat engines are still limited by Carnot. I have a bunch of largish Seebeck devices in my shed never fitted. I was going to do solar thermal + Seebeck, but went big on solar PV instead.

Here and the 'See also' links: https://www.earth.org.uk/note-on-Spacetherm-aerogel-thermal-insulation.html And here, for lolz: https://www.theregister.com/offbeat/2010/11/24/how-i-used-space-shuttle-tech-to-insulate-the-living-room/471707

FWIW, I established with my FiT administrator that it should be OK to add balcony solar to an existing house that has deemed exports: https://www.earth.org.uk/note-on-GB-FiT-and-plug-in-solar.html

We were told by a neighbour with some glee during our house-warming party (previous house) that the occupant had died in the main bedroom. Luckily there was no smell by the time we moved in!

This may be helpful, but I think that the bottom line is that anything other than the current marginal pricing scheme is lilkely to be gamed and hides true costs. https://www.carbonbrief.org/qa-how-the-uk-government-aims-to-break-link-between-gas-and-electricity-prices/

https://www.beama.org.uk/resourceLibrary/university-of-salford---beama-trv-energy-house-report.html Unlike gas central heating systems, TRVs are often omitted from ASHP installations based on concerns that they may reduce system efficiency and increase energy use. However, open-circuit design relies upon accurate sizing calculations and use of an appropriate weather compensation curve, neither of which can be guaranteed. Furthermore, open-circuit design limits occupant control and can lead to overheating in rooms with uncontrolled heat gains. Tests were therefore conducted to measure how trimming room temperatures using TRVs influences internal conditions, ASHP efficiency, and space heating energy consumption.

FWIW: https://www.beama.org.uk/resourceLibrary/university-of-salford---beama-trv-energy-house-report.html

Kein Ding