here you can see a typical day in our usage, as much as it exists (cant see how to bring the pic inline)

one spike was a washing machine i think, the other was our evening meal

overall i think it was around 14kwh

so cost at 32p = £4.48 a day

if i went on octo go it's 41p and 12p for 4hrs for 0030-0430 https://octopus.energy/go/rates/

which, given i used about 1.2kwh in this time would mean a bill of 13kwh @41p and 1.1 @ 12p = £5.33 + .12p = £5.45

however if i invest in a 13kw battery i'm good for most days like this - £7.6k

so such a day would be 14kw at 12p or £1.68... however if i tip over that in the day i do get burned. it's rare enough beyond the car charges which can all be accomodate at 12p

so. break even is £7600 / £2.8 (£4.48 - £1.68)

2714 days

7.43 years

assuming nothing changes

it doesnt give you switchover like tesla (double the price), you can fit a double socket (urgh) for nowt or a switchover to get power back on for a few £££ (my pref)

a pessimist would say the cost per kwh will go up in Q1

at 50p a kw i think it is unsustainable and riots will occur but payback would be 1428 days

assuming Octo kept it at 12p which they wont

rambling over. i'm leaving the country, it's ****ing shit

A smart v2h charger would save me the £7.6k and allow me to use a bigger batt but hey ho.. not available

 

Understandably with you moving house you had other stuff to sort and EPC B is agreat. Agree your ROI calcs
However having first done a year on 'Go' at 5p/15.96p fixed and now on a 7.5p/35.11p fixed deal struck in May 22 which ends 8/23 the picture differs.
I also had a good nearly two years before that on 'Agile' back before shit hit the fan and that was sub 5p much of the time especially wee small hours and pre peak (pre 4-7pm).

My average since smart meter came January 2019 is 10.8p/unit - which includes EV and a few thousand kWh this summer the ASHP heating the pool
Charging the EV has cost £75 which works out at under 2p/mile. House batteries grown from 3 originally ->5 now.
Original investment was £4k then each added battery on the string cost another £1k.

We all don't know what will happen come spring 2023 but I have all summer to jump. For sure the dismounted solar HW system will be repurposed pool-side phew
Payback is never something that has guided me. It's all been seat of the pants: minimise costs spend spare cash while **** all interest paid.
This was us using 13.85kWh yesterday including all space heating, hot water and cooking. No solar dull day.
I can identify the different patterns but you can see the blue (batteries) assisting.



Today so far. Note the dishwasher turned on at 00:30 hrs. Also a little solar PV but colder day 18.15kWh so far. Must go watch the jungle!


edit: early hours next day 17th November only 18.35kWh batteries now at 12% almost time for recharging, 11kWh at 7.5p/unit. Happy days

 

The boat has sailed I think on this stuff
tariffs are shyte, batteries are expensive. I agree it has already worked for you but there is no future in it as the batts don't even last that long.

I'd need to bet on an increase I don't think is viable for the country as a whole, would cause mass issues and a depression

I may as well invest 7.5k, get £750 return and put that against the bills. That opportunity cost is not small in a game like this. So I'll stick to what I know.

 

Batts are 10 year warranty. Programming is conservative I think. After near 4 years they still fully discharge to 10% and charge up to100%.

The future who knows. In nearly 4 years at 7000kWh/year space heating, hot water and cooking/lighting at 10.8p/unit I have already saved est £4.5k (28000 units at 16.2p saved each unit) so the batteries have damn nearly paid for themselves already (and will have by August 2023). You project hypothetically 7.43 years ROI but this is real data. I may be wrong about the 16.2p by a few pence either way but not by enough to alter the case. The batteries have paid off and they can only be a bonus going forward.

edit:
No crystal ball! I just saw the way renewables religion was going wrt power generation. Bought an A-frame from Ferrybridge in 2017 and saw the towers go. QED

 

You did well Rog
batts have a life and do start to degrade but you are covered. I'm not.
The future is v2h for me. In a year or two I will look to swap to such. I guess our Swedish commentator is correct, they will make zero progress as is gov modus and just interfere in the market but I see a decade of windfall taxes and I expect those companies will massage the books, adapt approach and the take will drop fairly quickly

 

Agree v2h (**** the g for grid) so assuming I keep the 'e' that is limited to what 5A at the 230v socket. Just dug out my old motorhome kettle which is badged 950w. Toaster already 1000w. Fridge/freezer takes about 425w when compressor running. Weird a wee while back you persuaded me not to trade the 'e' for £8k cash and a 3-month old DCT Fabia. Whereas now you are right pissed at the variable tariff and rip-off public charger prices. So might the 'e' get a stay of execution? After all you will have to replace the tyres might be a few years longer on these when your mileage drops back. Who knows what the twats will do next year when/if this crisis winter turns out to be a false alarm.

 

Indeed. I'm torn at the mo.

with your setup you'd be mad to get rid, almost free fuel in the summer months with a bit of tinkering with balancing batteries, charging and solar
Other small cars are not nice things in my limited exp
I could readily revert to the S2s, Jessie is getting on ok with the boosted one though prefers the e. Could removed the pass seat and put a dog bed in it
ideally off grid for me but not viable here as no land. Solar does very little on days like today so I thinking a watermill would be the perfect location.

Maybe this is all Nick's great reset thing? Haha


​

 

Free VED until Apr 2025

 

EV car tax see paragraph 5.34 page 56.
Basically £ 20 p.a. IF registered before 1st April 2017. After that £ 10 for first year, and then £ 165 for subsequent years.
https://assets.publishing.service.go..._2022_BOOK.pdf
Tax on Electricity Generators see paragraph 5.33
Anything about £ 75/MWh (7.5p/kWh) taxed at 45%. To this comes of course Corporation tax 19% atm rising to 25% in April 2023. BUT it is only for those that generate more than 100 GWh (across a period? Period undefined) and for profits above £ 10 Million. So the community mom and pop solar and hydro plants are excluded. That is a good thing.
And yes, Jason I see it as unlikely they will reform the electricity market. Because the EU didn't, they also did windfall tax but with a higher strike rate of € 180 / MWh. As I said before the market reform has to be done in tandem with the EU. And EU cannot raise taxes, it is down to individual countries to use the EU windfall tax rule. Sweden won't use it for political reasons.

 

It's the final nail in the BEV coffin for me.. expensive fuel and tax and short range and high purchase price
I don't mind older. I prefer self maint.

Currently browsing though probably a terrible time to sell