DJH: >>>> "There's nothing that now stops the mass installation of PV or other home renewables"

On the contrary! Home PV retrofit is no longer economic, as far as I could see. It's more effective to install PV in large solar farms.

It has been suggested that investing in a battery with PV could help avoid exporting PV electricity at 1pm and reimporting it at higher price in the evening. I haven't looked at the economics, it must depend how you bet on prices differentials! It might be better to charge the battery at 3am rather than 1pm, as well as the car and the hot water cylinder.

That's also the issue with V2G - ideally you'd charge the battery at 3am and discharge it the next evening at 6pm, without flattening the battery by driving anywhere inbetween. As the cost of electricity is so low compared to the other costs of EV ownership, and many people have not installed smart meters, I wonder how many of the public will want to participate in V2G, or will just drive home at 5pm and plug straight in?

The economics for utility scale storage don't seem great either. The Coire Glas pumped storage scheme (biggest in UK) was intended to store power over several days of low wind, but has not progressed, reportedly not economic. It has just been reapproved with bigger turbines, so it can fill/empty on a shorter cycle to improve the cashflow.

If you already have the monitor (so the resources are already consumed), why not just try it - what've you got to lose?

I thought we were in control of our energy usage, so I was surprised that the monitor immediately showed up several other ways we were wasting electricity. I'm happy to bank the savings though!

Posted By: bot de pailleIf research and government funding was poured into it, it could be made affordable and economic.

More likely that Tesla and other car manufacturers and their battery partners will solve it eventually if it is soluble, IMHO. But still likely to be the case that large shared systems are more cost effective than domestic systems. It would be nice to have a battery that made me immune to the nuisance power cuts we get here though, so I hope I'm wrong.

Tarrifs are based on the difference bwteen production and demand. simple market economics. Energy storage would render this difference meaningless.

I don't see why. Energy storage is already included in wholesale markets and has a significant price based on the cost of providing it. Electricity has to be used when it is generated - either consumed or turned into some other form of energy, so the price is always going to be time dependent (until we get to 'too cheap to meter' of course )

Elon Musk?

His EV development is based on government legislature, especially in California. Its well known that Tesla receives a huge amount of government money and legislative support. California passed a law mandating a minimum number of EV vehicles by a certain year. Other states have passed similar laws.
just one example, there have been others:

Barrons
STOCK ALERT
A California Truck Law Is Bullish for Nikola and Tesla Stock. Here’s Why.

By Al Root
July 6, 2020 6:30 am ET

COURTESY NIKOLA

A California law passed recently will benefit the electric vehicle sector, and could further drive enthusiasm for stocks such as Nikola and Tesla, as well as alternative fuel companies.

California passed the Advanced Clean Trucks rule in late June. It requires heavy duty pickup trucks to be zero-emission vehicles. The rule will be phased in from 2024 through 2035."

Musks space program? largely financed by putting US government and military equipment into space.

The notion that these entrepreneurs are somehow doing this without government money or legislature is...

Posted By: bhommels

Posted By: bot de paille
Large scale national energy storage is important, but so is local domestic energy storage,because whilst we all follow similar patterns of usage through out the day which can be roughly predicted, home storage would allow the necissary flexibility on an individual home basis.
Households can generate their own electricity in any manner they wish and store and use it.

I don't see why domestic storage is so important. To me domestic battery storage looks like a gadget to boost "green credentials" where in reality it has very little potential for reducing CO2 emissions.
It would be better to have the householder invest the money in reducing energy demand (insulation?) instead, and put the batteries in a location, and under the control of, a renewables operator.

Because it allows households to generate their own electricity however they wish, and store it.

It also allows energy generators to download to households during periods of high renewables generation, freeing up battery space.


There is nothing to say you cannot implement energy saving measures too.You do both.

Requiring off peak /on peak tarrifs prehaos is a sign that the proposed project is not financially viable. Consumers are essentially subsidizing an uneconomical model.

Think that's why it's been planned for many years and never built yet! Plans revived last year, and also for smaller pumped storage projects at Cruachan and Llanberis.

If enough consumers can buy their own home batteries for less than £200 per kWh, then grid-scale storage wouldn't be needed. But I doubt that is going to happen anytime soon, given most folks' resistance (on this thread and more generally) to even having a time-of-use electricity meter installed for free, nevermind changing the time they import electricity.

More likely that some people will buy batteries, and some companies build storage dams, and that still isn't enough storage to balance supply/demand prices in cold calm weather like today!

Nevermind 'inter seasonal’ storage, which makes income only once per year!

Posted By: WillInAberdeenIf enough consumers can buy their own home batteries for less than £200 per kWh, then grid-scale storage wouldn't be needed. But I doubt that is going to happen anytime soon, given most folks' resistance (on this thread and more generally) to even having a time-of-use electricity meter installed for free, nevermind changing the time they import electricity.

I don't think that's right. If batteries were available at £200/kWh then I for one would buy one and a smart meter to go with it. I expect there's a lot of other people would too.

Posted By: bot de pailleSufficient Battery storage eliminates the onpeak/off peak supply and demand paradigm.

For which market - wholesale or retail?

One other factor to think about with batteries is the risk. Any energy storage device has a risk associated with it, that needs to be managed. It's easier and likely more cost effective to manage the proper maintenance of lithium batteries in central, commercial installations than it is in individual homes. Not yet a big problem but as more batteries are installed and the age of the batteries increases there will be some fires.

But I think you and I will just have to disagree on the likely future path of this technology, Bot.

As EV vehicles become the norm, battery technology will advance leaps and bounds.
Battery manufacturing will increase as an industry.

Posted By: WillInAberdeenHowever in practice there has been much resistance by the public to get onboard with smart metering and electricity usage, even including from members of this forum.

Maybe more resistance from the latter than the former?

14.53 million smart meters installed to date - and 1.82 million in 2020, despite Covid (±7,000 per working day) doesn't seem bad to me, even though there was a slow start.

https://www.electralink.co.uk/2020/12/smart-installs-dip-lockdowns-grip-gb/

Posted By: bhommels

Posted By: bot de paille
Because it allows households to generate their own electricity however they wish, and store it.

This is the eco bling aspect.

It also allows energy generators to download to households during periods of high renewables generation, freeing up battery space.

Grid connectivity is, in most cases, the limiting factor with large scale renewables. Distributed domestic batteries will do nothing to mitigate these grid issues except for the relatively small amount of domestic microgeneration.

There is nothing to say you cannot implement energy saving measures too.You do both.

With infinite money, I'd be happy to!

infinite money? you mean like the 10 billion spent on the track and trace app? Where did they get that money suddenly that they couldn't spend on home batteries?