Cooeyswell

Have you tried splitting the Ubiquiti network into separate 2.4 and 5ghz networks then reset and reconnect the Sonos stuff ? I'm not sure this will help but it would be relatively easy to try. (I run a couple of Sonos Soundbars on Ubiquiti with no issues and without spitting the network)

This article refers to Lithium-Ion batteries. While these are used in some battery systems many others use Lithium-Iron-Phosphate (LFP) batteries. LFP batteries do not use cobalt or nickel and are seen as a "cleaner" chemistry type albeit with a reduced energy density.

Yes it does require a 32A connection - I had a high current feed put in for the garage when I built the place, so not a big issue for me - Just another MCB on the CU. Luckily I live in one of the civilised parts of the UK where part-P was never implemented so the system was entirely self installed. If you are unluckily enough to live elsewhere then a sparky would be required for the final hookup. You do need to inform the DNO but it comes under G98 provision, so you don't need permission to install but you do need to inform them after the fact. As an aside I have just received a flyer in the mail for a PV install (3.6Kw) for £4k. This gives a 10Yr-ish payback with my usage/location, which is marginal in my book but a lot better than the £7k I was previously quoted.

The inverter/charger connects into the mains, the battery connects into the inverter. I use a Solis inverter (https://www.solartradesales.co.uk/solis-3-0kw-5g-rai-energy-storage-ac-coupled-battery-charger) and a Seplos battery kit (https://www.fogstar.co.uk/collections/seplos-mason-kits/products/seplos-mason-280l-and-x16-grade-a-eve-lf304k-battery-bundle) Prices and supply vary but deals can be had with a bit of patience. My calculated round trip efficiency is somewhere between 80-90%. Off-peak electricity is currently ~40% of peak price,

I came to this from the opposite direction. I need power 24/7, 365 days per year. Where I live PV is pretty much a non-event for 3 months of the year and marginal for another two. (I would do a lot better with wind energy but its not acceptable to the planners.) E7 electricity is available at reasonable cost 365 days per year. I therefore installed a 15kWh battery system charged from E7 (no solar at all), including the inverter this was <£3k. This moves almost all my entire electricity consumption to off peak. Payback time is around 4 years. Given this as a starting point, If I then work out whether it makes sense to add PV to the system the answer is pretty much no. Don't assume that a battery must be an add on to PV. Consider PV as an add on to a battery and do the maths - you may be surprised. As for the environmental story - The off-peak period has a lot more renewables/nuclear in the mix so there is likely to be a net CO2 reduction compared to raw electricity usage.

Sorry folks that number was pulled from memory - and was clearly wildly incorrect. The average window U-value is 0.9 (Rational Auraplus, Triple glazed, magic coatings etc.) The house is South facing, Coastal and Northern. Overheating has not been an issue while we have lived here. Salt deposits on the windows provide all the shading we need 🙂 Not sure how PHPP handles this.

I have weeds and grubby paving - let me know how this works out

Passive spec- 0.1U-0.12uU in all directions, 0.15U windows, MVHR etc. The usual stuff. I lived outside Chepstow for many years. At no point did I encounter Welsh cooling undercrackers, neither has anyone here suggested the application of Welsh crackers (under or over) as a cooling mechanism. I look forward to being enlightened.

As quoted by our representative from the sunny uplands of southern Wales. I'm living in a Passive spec build in a northern land - cooling ain't an issue.

I'm in much the same situation regarding scrappage. The jerrycans are currently sat under a workbench in the garage but I can't see me using them again so they need to go. I guess the practical thing to do is to cut them up and separate the waste for recycling. Sunamp confirmed the use of food grade Sodium Acetate Trihydrate and its recyclability a couple of years ago (also its use in salt and vinegar crisps) so no issues there. I would consider whether you can make use of the vacuum insulation panels before you discard them. They are relatively expensive and hard to come by. I have reused the steel case and the vacuum insulation panels to insulate my new LFP battery system. The rest is mainly e-waste and can be recycled.

A quick follow up on this. After 5 days of operation I have used 5 units of peak electricity, all other usage has been successfully covered by the battery. I do see import from the grid when running high power items like the 3kW kettle, but this is relatively small in the scheme of things (~700W for 2 minutes). I also see import when an appliance exhibits "burst" behaviour - in my case both the induction hob and ovens - This appears to be due to the speed of response of the inverter as it ramps up to cover the demand over a few seconds. I assume I may be briefly exporting as the inverter ramps down as the load cuts off. In my case the 3kW inverter is looking like the right choice.

I did look at 5kW inverters, most of these seem to be hybrids and cost around £500 more. Bizarrely several 5kW hybrids will only provide/source 3k to the battery (Growatt). They also (as mentioned) require a G99 sign-off prior to the install along with payment. G98 is a lot simpler. I think this size gives the best "bang per buck" for my purposes. I am not attempting to cover all power consumption scenarios. From observation I expect to cover 80-90% of my peak usage with a 3kW system.

I am in the process of self-installing just such a system. In my case the hardware is A Seplos Mason 280L (14.4 kWh, A-grade cells) £2156 A Solis RAI-3.0KW 48ES 5G AC Coupled Inverter £640 I don't have or plan to install PV. I will be using this system to shift the majority of my power usage onto E7. Just finished the wiring today, tomorrow is the big switch on Wish me luck

That's an interesting option - I don't think I have come across one of these before

I have exactly the same democratic discussions and house voting system. After 40 years my better half is used to my tech inspired diversions but is equally well versed in analysing them. So after two periods of extended cold showers this year I got the following questions :- - Are you happy to be having cold showers ? - Do you think I'm happy with cold showers ? - Do you think your 91 year old mother was expecting to have cold showers when she moved in with us ? - If we don't replace it now then when ? ( Please show your working with a detailed schedule) - Who the **** is going to fix this **** after your demise ? (that was after day 3 of cold showers, the "imminent" was implied) - If you die "unexpectedly" due to a freak cold shower incident, who do I call ? (Number for plumber not undertaker required). I took the hint.