2017 Leaf to offer V2G: Thoughts?

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BioNick

New member
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Jan 19, 2017
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4
Hey Leaf owners!

Nissan announced at CES that they're going to enable to Vehicle to Grid charging (potentially getting paid for both giving and receiving power from the grid).

Has anyone ever used this or something like this before? Is it actually feasible?

And if it does exist in the near future, what does everyone think are the pros and cons?
 
I remember reading a thread here about someone already doing this for emergency purposes. Let me see if I can find it.... http://www.mynissanleaf.com/viewtopic.php?t=13097
 
Not sure about it being only 2017's that have bi-directional CHAdeMO - I was under the impression earlier Leaf model years had this ability already. What is mostly lacking is the general availability of the "To Grid" equipment here in the US.

My suspicious side says the reason we don't see Nissan encouraging it here more is that it might have led to even more battery degradation issues than they already have to deal with.

My rational side says it's because the equipment is expensive and electricity is cheap, so where would be a reasonable payback to the vehicle owners?

My practical side says it would make a good (but limited) emergency backup - the link to the DIY thread in the above post is probably the best solution reasonably available here today. Maybe someday Nissan will integrate this DC/AC plug feature?


An earlier discussion thread:
http://www.mynissanleaf.com/viewtopic.php?t=8910


Other relevant links:

http://www.mitsubishi-motors.com/publish/pressrelease_en/corporate/2012/news/detail0834.html

http://www.greencarreports.com/news/1076589_nissan-launches-leaf-to-home-electric-car-power-system

http://insideevs.com/nissan-leaf-powers-a-concert-using-v2h-chademo-video/

http://www.greencarreports.com/news...of-42-electric-vehicles-nissan-leafs-included

https://transportevolved.com/2015/0...ric-car-power-your-home-the-electricity-grid/
 
V2G is absolute nonsense. It requires massive investment and pays very little back.
What makes sense is smart delay system: charging stops on demand for a second/minute/hour
Requires almost no investment and is efficient.

V2G is a lose-lose cycle. Energy lost due to charging. Energy lost due to discharging.
Energy lost due to conversation from grid AC to battery DC and back again. Energy lost
due to line-losses. Grid-2-grid cycle total efficiency catastrophic.

I don't understand why educated engineers (there are no at Nissan as we all know)
don't stop this nonsense. Most likely same reason why hydrogen was hot thing for years.



PS! after all those losses car must be charged AGAIN. And there is also a cycling degradation.
 
BioNick said:
Hey Leaf owners!

Nissan announced at CES that they're going to enable to Vehicle to Grid charging (potentially getting paid for both giving and receiving power from the grid).

Has anyone ever used this or something like this before? Is it actually feasible?

And if it does exist in the near future, what does everyone think are the pros and cons?
The benefits are obvious, and IMO, in a decade or two it will be viewed as comical that in the early days of the BEV transition we put hundreds of millions of kWh in vehicle battery packs, then limited their use by not providing them the ability to discharge to, as well as charge from, external sources.

Links to many many (V2H), vehicle-to-building (V2B), and vehicle-to-grid (V2G) applications are discussed on this thread:

V to G and repurposing of BEV batteries in secondary non-BEV applications.

http://www.mynissanleaf.com/viewtopic.php?f=7&t=15816

And below is Nissan's most recent summary:
...Announcing the New Nissan LEAF: The Next Chapter in Nissan Intelligent Power

On stage at CES, Ghosn announced plans to launch a new Nissan LEAF, with ProPILOT technology, enabling autonomous drive functionality for single-lane highway driving. The new LEAF is coming in the near future and represents the next chapter of Nissan Intelligent Power.

The new LEAF will build on Nissan's industry-leading position in electric vehicles (EVs)...

EV batteries can do more than just provide power for driving – they can also be used as energy storage devices. To this end, Nissan is promoting EVs as clean mobile energy units. Integration of EVs into society will help energy distribution across the grid, and vehicle-to-home (V2H), vehicle-to-building (V2B), and vehicle-to-grid (V2G) solutions have already been adopted in many markets such as Europe, the U.S. and Japan.

In 2012, Nissan introduced its "LEAF to Home" system in Japan, allowing drivers to supply a house with the energy stored in a Nissan LEAF battery. Users can charge the Nissan LEAFs at night when electricity is cheaper, and then use that electricity as the daytime power source for a household. This way, the system helps to alleviate power consumption during peak periods when demand is highest and most expensive. It can also be used as a backup power supply for blackouts and emergencies.

Nissan has also been testing a V2B system at the Nissan Advanced Technology Center in Japan since 2013. In this project, six LEAFs contribute to a decrease in electricity costs. Nissan's new Europe HQ in Paris will be partly powered by V2B and V2G technology when it opens in spring 2017.

Today about 4,000 households in Japan are utilizing EVs to manage home energy use, and thousands of EVs are powering buildings in the U.S., Japan and Europe.

For example the Hawaiian island of Maui, Nissan LEAF owners volunteered to participate in a unique project which explored the possibilities of combining smart grid, renewable energy and electric vehicle technologies into a single comprehensive energy-management solution. Residents use renewable energy from wind and solar sources to power their vehicles. In return, they use energy stored in their EV to manage the energy of the island. About 600 LEAF owners participated in the project and Nissan, along with other partners, are using the information to inform technology development and policy recommendations.

Elsewhere in the U.S., Nissan is involved with a variety of V2G and V2B activities. For example, Nissan has been a long-term partner with the Department of Defense on multiple grid-based projects at Los Angeles Air Force Base (California), Fort Hood (Texas), and Joint Base Andrews (Maryland). Combined, approximately 30 LEAFs have been deployed at these bases to demonstrate the technical and market viability of EV participation on the grid. Similar programs are underway between Nissan and other organizations around the U.S., including universities and utilities.

Nissan is also involved with commercializing V2H technology in the US based on market success in Japan. In this context, V2H would provide a homeowner with emergency power during outages and, potentially, a means of storing solar energy for use later in the day or at night. As part of its commercialization effort, Nissan demonstrated the V2H technology to a variety of US audiences in 2016, including to the general public.

Finally, Nissan is also helping to extend the "second life" of the EVs' lithium-ion batteries. In Europe, through the xStorage project, in partnership with Eaton, consumers can save money by drawing energy from the sun and the grid, and then sell it back to energy companies. Meanwhile, xStorage for business allows organizations with high energy consumption to manage their energy usage and to power their business in a more sustainable, smarter way.

For example, in November 2016, Nissan and Eaton announced a ground-breaking 10-year deal with Amsterdam Arena – the world-famous entertainment venue and home of Ajax Football Club - to provide back-up power from secondhand Nissan LEAF batteries. The xStorage-building system will help to ensure the lights never go out at the renowned 55,000-seat stadium, which has played host to numerous high profile concerts and sporting events over the years...
http://nissannews.com/en-US/nissan/usa/releases/press-kit-nissan-intelligent-mobility-at-ces
 
arnis said:
V2G is absolute nonsense. It requires massive investment and pays very little back.
What makes sense is smart delay system: charging stops on demand for a second/minute/hour
Requires almost no investment and is efficient.

V2G is a lose-lose cycle. Energy lost due to charging. Energy lost due to discharging.
Energy lost due to conversation from grid AC to battery DC and back again. Energy lost
due to line-losses. Grid-2-grid cycle total efficiency catastrophic.

I don't understand why educated engineers (there are no at Nissan as we all know)
don't stop this nonsense. Most likely same reason why hydrogen was hot thing for years.



PS! after all those losses car must be charged AGAIN. And there is also a cycling degradation.

At low grid loading during off-peak times, the spinning generation units are already not running at peak efficiency. Some are kept running just because of peak loading and the cost and time required to startup is greater than losses from less than optimal continuous running. You can afford some conversion losses if it allows some of the spinning reserve to shut down.
 
With a stable power grid (I can't remember the last time we really had a power outage) I have no interest in this feature.
After all, I need just about all the Watts I put into my Leaf to drive it!
 
V2G could offer the potential to add far more renewable energy sources to the grid by providing massive distributed storage for it. That is probably far into the future, but why not build the foundation for it today?
 
arnis said:
V2G is absolute nonsense. It requires massive investment and pays very little back.
What makes sense is smart delay system: charging stops on demand for a second/minute/hour
Requires almost no investment and is efficient.

V2G is a lose-lose cycle. Energy lost due to charging. Energy lost due to discharging.
Energy lost due to conversation from grid AC to battery DC and back again. Energy lost
due to line-losses. Grid-2-grid cycle total efficiency catastrophic.

I don't understand why educated engineers (there are no at Nissan as we all know)
don't stop this nonsense. Most likely same reason why hydrogen was hot thing for years.



PS! after all those losses car must be charged AGAIN. And there is also a cycling degradation.

This statement is written with an awful lot of confidence given it is complete nonsense. The reality is that the wholesale costs and emissions intensity of most electrical grids varies widely. Costs vary between negative (where a wholesale customer is paid to take energy) to many thousands of dollars per MWh. Emissions vary from zero (renewables, baseload nuclear) to highly polluting (liquid fuels in open cycle peaker plans).

V2G has the potential to reduce or remove entirely these price spikes and minimize the operation of emissions & pollution intensive generation by providing an alternate source of energy. Even including round-trip losses this still offers significant opportunity for financial gain and emissions reduction.

V2G also offers other benefits in reducing localized strain on transmission and distribution networks, particularly during peak load events. It can potentially defer or remove the need entirely for capital equipment upgrades.

Smart delay systems do not represent a reduction or offset of load. They only represent a reduction in the impact of new load. This is beneficial but no-where near as beneficial as two-way power flows.

I can only hope that a market based mechanism can be developed to incentivise these benefits to the EV owner. I would be happy to sell my remaining energy at $1+/kWh at 6pm when I return home from work and then recharge overnight at $0.10/kWh, even if only for a couple of days a year.
 
GetOffYourGas said:
V2G could offer the potential to add far more renewable energy sources to the grid by providing massive distributed storage for it. That is probably far into the future, but why not build the foundation for it today?

There will be massive demand for vehicle charging. Smart delay will provide massive "planned consumption" - aka vehicles only charge if there is energy that is appropriate for low-priority tasks (charging EVs). V2G also consumes at appropriate moment. It just gives back when grid asks. But there are losses. And in the end discharged battery must be charged again. With losses.


V2G also offers other benefits in reducing localized strain on transmission and distribution networks, particularly during peak load events. It can potentially defer or remove the need entirely for capital equipment upgrades.

Smart delay systems do not represent a reduction or offset of load. They only represent a reduction in the impact of new load. This is beneficial but no-where near as beneficial as two-way power flows.

Smart delay will also reduce strain during peak load because there will be no load as vehicles will not consume while grid peaks.

Smart delay system will definitely offset the load to later time. That's the whole idea of smart delay. V2G ideology consumes while there is no peak (same with delay system) and discharges to grid while it peaks (on the other hand delay system stops consumption which lowers grid load).

If we exclude V2G inefficiency two paused vehicles are exactly the same as one V2G vehicle.
In real life it's something like 1,6-1,7 paused vehicles is the same as one V2G vehicle.

I would call pausing devices as PoD - Pause on Demand: Not sure but it seems it represents my idea as clearly as possible in few words.
Also this tech can be used for central heating/water heating devices. Or any other buffer-capable power hungry device.
 
I want It!
By the end of the year we will live in a Net Zero capable home with enough solar PV to power the house (all electric including GSHP for heating and cooling) AND still have enough to charge the Leaf! If the 30kW car battery could be used to power the house during the non-sunny hours then we could be really off the grid!
 
A little off topic, but I would like to see V2V solutions. It would be awesome if you could call a friend, or AAA, and do a DCQC from CHADEMO to CHADEMO or, if technically possible, CHADEMO to CCS.

Obviously not something one would do on a regular basis, but it sure would be handy in VLBW situations.

It could lend itself well to an Uber like model too.
 
Confirmed, $26k - ouch!

For AAA though, if they charged $100 for an emergency QC and did 10 calls a week, payback would be 6 months.
 
alozzy said:
A little off topic, but I would like to see V2V solutions. It would be awesome if you could call a friend, or AAA, and do a DCQC from CHADEMO to CHADEMO or, if technically possible, CHADEMO to CCS.

Obviously not something one would do on a regular basis, but it sure would be handy in VLBW situations.

It could lend itself well to an Uber like model too.

Refer to the ORCA Inceptive - http://www.andromedapower.com/orca-inceptive/

Sorry for the repeat - should have finished reviewing all posts!

Another opinion piece that supports the eventual multi-purpose uses of EVs:

https://www.youtube.com/watch?v=Kxryv2XrnqM
 
Oliverovan said:
I want It!
By the end of the year we will live in a Net Zero capable home with enough solar PV to power the house (all electric including GSHP for heating and cooling) AND still have enough to charge the Leaf! If the 30kW car battery could be used to power the house during the non-sunny hours then we could be really off the grid!

Nice.

Though people usually buy their vehicles to use them as transportation devices.
Just hinting that EV-s, before they can be a) driven; b) used as energy sources; must be recharged.

What you need is a Powerwall2. Then you could recharge your vehicle too. On the juice you collected when you were at work (midday).
 
arnis said:
V2G is absolute nonsense.
No, it is actually a great idea.
arnis said:
It requires massive investment and pays very little back.
Today. If we are smart, that will change.
arnis said:
What makes sense is smart delay system: charging stops on demand for a second/minute/hour. Requires almost no investment and is efficient.
Agreed this is the most appropriate first step.
arnis said:
V2G is a lose-lose cycle.
Agreed that storing energy should be avoided, when possible.
arnis said:
Energy lost due to charging.
Yes, approximately 1%.
arnis said:
Energy lost due to discharging.
Another approximately 1%.
arnis said:
Energy lost due to conversation from grid AC to battery DC and back again.
Approximately 1% each way if done well.
arnis said:
Energy lost due to line-losses.
Nonsense, since the vehicle is *much* closer to the load than the power plant. This is actually an important benefit of B2G technology.
arnis said:
Grid-2-grid cycle total efficiency catastrophic.
95% efficiency is "catastrophic"? No, that kind of efficiency is what enables this type of technology to allow us to move into the future.
arnis said:
I don't understand why educated engineers (there are no at Nissan as we all know) don't stop this nonsense.
So you are saying that the engineers at Nissan that developed the BEV which is still the top-selling EV in the world six-and-a-half years after it was introduced into the market are uneducated? What a ridiculous statement. I have met quite a few of the engineers who designed the LEAF and I can tell you that they are extremely talented at their jobs. Frankly, I think an apology is appropriate.
arnis said:
Most likely same reason why hydrogen was hot thing for years.
I don't recall hydrogen ever being "hot" beyond in the minds of some who don't (or won't?) see the obvious problems with that approach.
arnis said:
PS! after all those losses car must be charged AGAIN.
This is where the approach taken to V2G becomes important. Obviously, you need to keep enough charge in your vehicle to get to your destination (plus a healthy margin). While this is only possible with a small subset of the BEVs in use today, it is likely to be commonplace in the near future.

But the other part of the equation is when the BEV is charged. As more and more PV generators are added to the grid, it will become more-and-more important to provide storage so that PV generation does not have to be curtailed. Since vehicle batteries NEED to be stored AND since Li-ion storage batteries are the most efficient form of storage around, the obvious thing to do is to charge those BEV batteries when the sun is shining.

The next issue then becomes how to prevent from running fossil-fuel-based generators when the sun does not shine and the wind does not blow. Sure, you could buy EXTRA batteries to do this, but that would mean having nearly double the amount of batteries than would otherwise be needed. We already have a desire to have lots of extra battery capacity in our cars for convenience and for longer trips. Why not use that capacity for other purposes when not needed for driving?

My idea is to move the metering for BEV charging and discharging to the vehicle itself. This would allow for "vehicle net metering" to allow BEV owners to purchase electricity during the daytime when there is a glut of PV energy (and therefore low prices) and allow them to sell at nighttime to either offset their consumption at nighttime or to provide energy to the grid in order to reduce the electricity needed from fossil-fuel generators.
arnis said:
And there is also a cycling degradation.
That is a real issue with *some* Li-ion batteries today. Of course, we know that this is NOT a fundamental limitation of Li-ion batteries, but rather it is an issue that will be almost completely engineered out of most future batteries. As it stands, there are already Li-ion chemistries which can withstand 12,000 FULL cycles and still retain over 80% of their original capacity. This level of durability (and more) is coming to the vast majority of the Li-ion batteries in the future.

Simply put, Li-ion batteries are the key enabling technology not only for BEVs, but for much higher penetration levels of renewable generators on our electricity grids. The Li-ion batteries in future BEVs should have the capacity and durability to provide for a multi-purpose role.
 
iPhone is also a "top selling smartphone" - but almost everybody agrees that it has almost never been the best
in anything. Leaf, being the "top", doesn't mean it is excellent, good, average, bad, very bad. Being on top doesn't define that.

V2G is not 95% efficient compared to load shift. We should exclude local generation to look at the isolated V2G setup.
To offer any load shifting, energy must be charged into the pack at one time and discharged at another time.
There are losses between primary energy generation (power plant) and battery.
And then there are losses between battery and consumers (grid is consumer).
This not only includes inverter near the vehicle. But also transformers that send electricity
to "nearby" consumers. Between consumers there is two transformers. At least.
Only some of the juice will be used by your closest neighbor with whom you might share a transformer.

Smart delay is not only the first step. It is the first and could be the last for perfect results.
If all excessive consumption (more than clean power plants can produce) is removed, problem is solved.
This includes vehicle that tries to charge at night when there is no available juice. Paused for too long.
In situation where there is demand for more energy that has been produced, V2G does not solve anything
(there is nothing to shift as there is deficit of energy).
Due to the reason vehicles are mobile, they are not reliable load shifter. Therefore widespread V2G system
will fail the grid once on the holidays when everybody goes somewhere and other day when everybody goes
to football play and leave their V2G vehicles near stadion. Not connected to grid.

V2G could be a second step but it is only helping if first step is unfinished.
And, like we agreed, Pause on Demand is still more efficient than storing for later.
 
arnis said:
iPhone is also a "top selling smartphone" - but almost everybody agrees that it has almost never been the best
in anything. Leaf, being the "top", doesn't mean it is excellent, good, average, bad, very bad. Being on top doesn't define that.
Apple also employs some of the best engineers in the world in the design of their products. Again, your insult of the outstanding engineers at Nissan was completely uncalled for. It reflects more on you than on Nissan or its engineers.
arnis said:
V2G is not 95% efficient compared to load shift.
You might be unaware of the current state of technology, but I am not. Single-phase inverters at that power level are already over 99.2% efficient TODAY. (See SE3500H and SE3680H graphs in that link. And that inverter is likely significantly CHEAPER (per kW) than the current generation of V2G products.) The battery in the Nissan LEAF has a round-trip efficiency of 97%. What that means is that FUTURE technology will achieve this level of performance (95% round-trip efficiency) or higher. The technology is already there and it will only get cheaper to achieve the same or better performance in the future.

Again, since the ROUND TRIP distance from the renewable generators to the BEV plus from the BEV to the home loads is MUCH shorter than the typical distance from a power plant to a home, the overall losses in the V2G configuration is likely to be LOWER than the losses in the current situation.
 
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