Jaap BurgerThe Dutch energy supplier NextEnergy is offering its customers a free 2 kWh plug-in battery.
The (4-year) monthly lease is €20.83, with guaranteed yearly savings of €250.
The Belgian energy supplier EnergyVision has also started offering this for new solar panel lease installations, but is also making the plug-in battery available to existing customers.
RE: https://mastodon.social/@burger_jaap/116325196094763442
Similar-sized plug-in batteries are already retailing for less than half of the quoted €1000 in Germany, so it’s easy to offer a guaranteed return if you make such a margin.
A battery to lower your energy bill as part of a supplier bundle was previously limited to ‘whole-home’ packages – including solar PV, heat pumps, batteries and so on – from retailers such as 1komma5, but that was still a very specific niche. Most consumers are electrifying their homes step by step using individual components. It’s great that plug-in batteries now offer that easy entry point, and that suppliers are working closely with their customers
to create behind-the-meter and front-of-meter benefits.
I’m currently analysing the first European V2G bundles: these are currently limited to energy markets (front-of-meter), whereas the benefits for the user could be much greater. There’s a gap here that needs filling!
Angela Scholder@burger_jaap Wow! That is a real profit! Paying at about 250 euro a year to save 250 euro a year.....
Well, at least then you don't lose money.
@AngelaScholder yes. Though they offer the 250 euro guarantee for five years, and (as I understand it) the lease is 4 years. So the net benefit should be 250 euro.
But buying a similar battery for 400 euro in Germany could yield 850 euro over the same 5 years.
@burger_jaap And these battery systems can be utilised as backup power sources, like being a sort of UPS. However, no idea how the converter works. So, might certainly not be 'uninterruptible'.
It's not forbidden, but systems that can deliver electricity mack to the net connecten as plug-in is not a good idea. It should be fixed connections.
In the early 2000s we had the Soladin inverter with solar panels as plug-in systems. So, it's not new.
@AngelaScholder Some can, and also advertise that functionality.
The Soladin early success in the Netherlands has actually informed the German regulatory debate to allow plug in solar. And now it’s spreading from Germany to all markets, including with plug-in batteries.
Ype KingmaYou may lose privacy for your real time energy use (P1 port).
christian mock@KingmaYpe @AngelaScholder @burger_jaap But not much, because dynamic prices go along with 15 min smart meter data anyways.
@cm @AngelaScholder @burger_jaap
Sadly, yes. The 15 min data from smart meters is also privacy leak, and it will take more to fix that one.
@KingmaYpe @cm @burger_jaap Ype, indeed it is an absolute privacy invasion where I would have to trust my energy supplier to not build a profile for us based on our use.
Especially with a dynamic tariff contract they could build a profile of our daily routines.
With the variable contract we're on I think it's only every other day they take the reading, unless you have the insight active for your use.
I didn't give permission, but here it is Liander takes a reading every three days.
It all >2
@KingmaYpe @cm @burger_jaap 2) is something you should be wanting to keep private. Certainly as you also have to trust them to keep the data safe.
I would be OK with a monthly read-out, or have a button "Send meter reading" where I have control.
If we are away from home, our daily use is 20-30% less than average. So, it is a perect means of determining if we are on a (short) holiday, or not.
This is an absolute security risk.
@AngelaScholder @cm @burger_jaap
Even with a monthly bill for a dynamic contract, it is possible to have full privacy for your meter values. The privacy leak is a design flaw in the current system.
@KingmaYpe @AngelaScholder @burger_jaap how would that work (assuming we're talking about hourly/15 minute flex rates, not monthly)?
@cm @AngelaScholder @burger_jaap
It needs a trusted third party, the key adder.
Encrypt meter value by adding a new large random key, and send the result to the adder/aggregator. Share the key with the key adder, and let the key adder only provider a key sum when there are be enough participants.
That gives a real time sum for P1 values.
For the monthly bill, do a similar encryption for the quarter values of one participant. The key adder and aggregator weigh with dynamic proces.
That's it.
@cm @AngelaScholder @burger_jaap
Compressed into one post :)
For more text and figures, see the first 12 (?) slides of my latest presentation for NLLGG, in Dutch:
https://codeberg.org/Ype/publications
Very much the same in English in the February presentation in Delft.
@KingmaYpe @AngelaScholder @burger_jaap Wow, that's impressive. But also, from an organisational view: who's the key adder? Must be kept separate from the privacy aggregator, but managed the same set of users...
@cm @AngelaScholder @burger_jaap
Thanks. The older articles at the same link have references to the inspiration for this. For the privacy I added the minimum number of real time participants and the minimum bill period.
The key adder delivers this privacy, so it should be controlled only by the participants. At the moment I am looking for a party to take this role, initially locally.
Lack of separation is known as collusion in cryptography: playing together.