Energy Prices (Strictly NO referrals!)
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Soldato
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not everyone can, either due to money or circumstance but if those who can do, then it lowers the pressure on mass generation for those who can't (for what ever reason)
house batteries are fantastic. maybe won't be needed for too much longer assuming EV to home becomes a thing.... but the flip side of that is I expect house battery prices will absolutely tank in the next 10 years. all those EV batteries need to go somewhere once end of life for a car and there is no better 2nd life that I can think of than house battery.
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In an ideal world that would work. Sadly we do not live in a world where if everyone who can have solar / battery does so, it will reduce the costs for those who can't due to reduced pressure on generation.
All that will happen is those who are wealthy enough to be able to afford solar + battery + EV pay less, while those who can afford the least still get creamed by the energy being sold on the open market.
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Don't get a home battery use vehicle-to-grid (V2G) instead, charge car up, use car battery as a buffer during the week.
Soldato
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which is why (as much as personally it isn't great for me) increasing standing charge and keeping at least the 1st X number of kWh energy cheap is probably a fairer charge that way even those making their own power still pay something. not popular I know.
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OK, so shall we also include the costs of replacement batteries for the EV since the vastly increased usage of it's battery to act as home storage will no doubt degrade it quite a bit faster than if you were only using it for transportation?
I'm waiting for V2G or V2H chargers to become available at a reasonable price (less £5k
).Currently I have a 75kWh battery sitting on my drive which I can't use for house purposes, will be a 111kWh battery next year - Really need these chargers !
Soldato
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long term absolutely but right now.... if Solar and home battery is only for the privalaged few then an EV with decent V2H is for the even more fortunate.
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Soldato
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source for that or are you guessing (it's a logical guess and something I used to worry about) but everything I have seen shows it is negligible due to it being such a light load compared to car drain . forgetting the launch leaf with cooling issues in general car batteries far outlive the car they are in.
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Not to mention, unless FIT is scrapped and all energy generation / consumption is done on a "1 for 1 basis", using the EV as home storage with a solar setup is also only really viable for someone that WFH / Retired / At home all day, since what would be the point in having solar, while your "battery" is sat in the carpark at work and you're getting a measly 7p per kWh or something ?
It seems rather counter-productive for a lot of people even if they do have solar.
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Yeah that's my only gripe with Tesla that they want to sell their home batteries rather than V2G/V2H. But I think other companies are working on this issue, you probably know more about than I do. Seems like a no brainer though.I'm waiting for V2G or V2H chargers to become available at a reasonable price (less £5k
Currently I have a 75kWh battery sitting on my drive which I can't use for house purposes, will be a 111kWh battery next year - Really need these chargers !
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Sure. I don't have stats on that, Telsa batteries degrade 1% per year so shall we say 2% per year on V2G?
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You might need to look at your maths there and use the info I supplied rather than a quick Google for average.
I'll use the current, generally considered high, cost of electricity just now
1100 kWh / 365 is a little over 3 kWh/day.
1100 kWh x £0.5/ kWh is £550/year.
A solar install with battery to store around 5 kWh is around £15,000 fully installed.
£15,000 / £550 = 27 years.
That seem a good reason for me to get solar and battery?
Even if we go balls out on the quote and cost of grid Elec over the next few years:
Solar with Battery - £10,000 installed.
Elec cost/year at 1100 kWh - £650 (20% increase on current high kWh cost)
£10,000/£650 = 15.3 years.
If the cost of electricity goes down from the current historical highs then it will be longer.
Still worth it?
For me - using my EV for home energy storage.
During Winter when solar gen is much less I would able to use the excess power in my car (charged at 7.5p kWh) to fill the gap which my home storage battery can't meet - about 5 kWh per day.
-> I didn't want to pay another £2.5k to increase my home storage battery size by an additional 5 kWh, just to cover 4 months of winter, as the costs/benefit didn't add up. If a home charger was released for £500-£1k to utilise my EV then it would make more sense.
Soldato
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true. But imo we have to accept that perfection is the enemy of the good. no one solution is going to fit everyone solar and car for some. solar and (cheap 2nd life) home battery for others, just solar or battery or V2H for others and then finally grid reliance for those who really have no option.
But...But... You can use the EV instead of a battery, you just need to buy an EV
... Oh wait, how expensive are those again? 
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aye what a backwards way of doing it tho, surely woudlve been easier to leave everyones DDs as is and then load the extra onto the accs
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countered
https://www.moneysavingexpert.com/utilities/free-solar-panels/ - ~11 years
https://youtu.be/4BUUQLsFSmY - ~10 years
I think the price of solar installs have gone up a bit, but that's more inline with everything as gone up a bit, pound is weak etc, since electric prices have also gone up then solar makes even more sense imo.
It's a lot of money of sure, I'm totally sold on the idea but circumstances/life I can't afford it either at the moment so just want to put that out there. I don't have my own drive way. Ideally you need a south facing roof and drive way for a car and then you're set. Of course home insulation yada yada.
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Associate
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How much is 10 years of petrol again?But...But... You can use the EV instead of a battery, you just need to buy an EV
Yeah, it's only the lucky few that seem to benefit. Majority of people will have to drive their battery away from their generation, waste the days excess solar and then return home with a half empty battery and charge up via mains. If it could get close to 1 to 1 credits of some sort so you could charge up at work with energy you generated at home that would be nice. I guess there would have to be a charge for grid maintenance on infrastructure though