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I’m not wholly sure why a restriction exists. My first one was capped but when the second was installed both were uncapped with ease and I can now draw 10kwh from them plus a further potential 10.9Kwh from my panels. In theory the DNO should not be concerned by output as it’s purely internal though the ability to draw more from the grid would be of interest. The proposed change could allow peaks of 14Kwh.discharge and perhaps charge.Is the implication that those of us with a 3.5kW power output restrictions (due to DNO limitations) will see that raised? Additional capacity would be welcome.
I’m not wholly sure why a restriction exists. My first one was capped but when the second was installed both were uncapped with ease and I can now draw 10kwh from them plus a further potential 10.9Kwh from my panels. In theory the DNO should not be concerned by output as it’s purely internal though the ability to draw more from the grid would be of interest. The proposed change could allow peaks of 14Kwh.discharge and perhaps charge.
capacity increase seems reliant on higher air temperature.
That’s the odd thing. PW is designed not to export by default though it does have the capability. Mine will push a couple of hundred watts now and again, generally less, but only because it’s balancing with the grid.My understanding of it from speaking with our installer is that the DNO limit (3.7kW in our case) is also applied to the powerwall, so it is artificially capped to that rate. I wonder if it is in case the powerwall pushes power to the grid occasionally? It does seem odd if it only ever supplies it to the house.
Perhaps because I’m on the Octopus Tesla Energy Plan, but my Powerwall definitely does export to the grid. My DNO has limited me to 3.7Kw on the export but the battery will push out up to 5Kw during peak times and runs the house while dumping 3.7Kw to the grid.That’s the odd thing. PW is designed not to export by default though it does have the capability. Mine will push a couple of hundred watts now and again, generally less, but only because it’s balancing with the grid.
Yes. The TEP does export by agreement with your DNO.Perhaps because I’m on the Octopus Tesla Energy Plan, but my Powerwall definitely does export to the grid. My DNO has limited me to 3.7Kw on the export but the battery will push out up to 5Kw during peak times and runs the house while dumping 3.7Kw to the grid.
With Gateway 2, solar inverters don’t power down at all (Unless they are exporting, in which case they just reduce output) If the grid fails, it isolates and carries on virtually unnoticed.Regarding the 3.6kW limit imposed by the DNO, it exists as a rule because when the grid connection goes down, inverters etc do not off instantaneously. To limit the extent to which power is briefly pushed in this scenario, they can impose a limit on output. In our case, we already have two times 4.0kW solar inverters, which was as much export as they would allow. We asked about a Powerwall 2, and we can have this as long as there is no export, and its output is limited to 3.6kW. We haven't gone ahead with it yet.
Edit: I don't think this update will increase output for those with a 3.6kW output limit. That's a hard limit imposed by the DNO.
3.6 (per phase I think) kW is the max export you can do and the only requirement is to notifying the DNO after the fact.
Yes. In essence, DNO aren’t concerned by Powerwalls because they don’t export (unless by separate agreement). My limit is 7Kw for my primary panels which were installed in 2015. My secondary panels can’t export. I have a 100amp supply. Internally, I can draw 20Kwh without using the grid, being the total available from panels and batteries.With Backup gateway 2, there is a site export limit which is set to whatever the DNO has said you can have. This is separate from whatever capacity limit your powerwall(s) have.
3.6 (per phase I think) kW is the max export you can do and the only requirement is to notifying the DNO after the fact. You can ask for much larger values, the bigger the value the more extensive the paperwork is and the greater the chance the DNO might decide reinforcement works might be required (that you might have to contribute to).
I have a 6kW export allowance which didn't cost me anything - I just had to wait 7-8 weeks for the DNO to approve it. (Incidentally when I spoke to them they said they don't actually care about battery storage as long as you stuck to the limit and all the things you were connected were type approved (ie you're a consumer installing off the shelf kit from a manufacturer that has had testing performed))
It was dependant upon environment temperature and I think 30°C was mentioned. If true, capacity will increase for one week a yearMy understanding from Elon’s tweet was that power would increase potentially by more than 50%
I don’t think he made any suggestion that capacity would be increased as well? Surely increasing capacity would mean “eating into” the buffers, and I personally would rather keep the 13.5kWh and have a Powerwall that lasts 20 years.