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  • The final cut of TMC Podcast #34 is available now with topics timestamped. We covered Tesla's rollercoaster prices, Toyota pushing junk science, Mike's new Model 3, Optimizing track mode for snow driving, FSD V11 apparently coming by the end of this week, and more. You can watch and check out the chat replay on YouTube.

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  1. sashton

    2x Powerwall on 2-phase UK supply: sensing PW SOC individually

    I have no issue with one phase on a 180 degree split phase (230v - 0 - 230v) supply not being backed up. It is whether the GW2 will function correctly with 2xPW/2 on the backed up (house load phase) and 1xPW/2 on the non-backed up phase (workshop so the PW/2 here is just to improve...
  2. sashton

    2x Powerwall on 2-phase UK supply: sensing PW SOC individually

    I have a written reply from Agile Phil (Octopus) that they can supply a Polyphase SMETS2 meter which function as a two phase vector sum meter on a 180 degree split phase supply.
  3. sashton

    2x Powerwall on 2-phase UK supply: sensing PW SOC individually

    Simply down to cost. We are currently limited to 23kW gen / 17kW export on a single phase supply. To expand our capacity WPD offered split phase for £6k (48 kW gen / 40kW export) but three phase would require a replacement PMT and a second 11kV conductor back to the substation and would cost...
  4. sashton

    2x Powerwall on 2-phase UK supply: sensing PW SOC individually

    @TyneTes I would be very interested in your experience of a split phase supply and a gateway2. We currently have a number of PW2 and a GW2 on a single phase supply but have reached the DNO prescribed generation limit. The solution being offered by WPD is a second supply 180 degrees out of phase...
  5. sashton

    Is there a log of the Powerwall Battery Percentage?

    I just pull it every few minutes from the gateway using a simple PS script and plot it out. The anomaly on Friday was that I only check for token expired and that was the day Tesla decided to downgrade the firmware resulting in an unexpected response until I manually created a new token. (Yes I...
  6. sashton

    Software Version 20.49.x

    For those that use Powershell to read local stats from the GW, post 20.49.0 this works: Powershell 7.1 example: Authenticating is simple: $postParams = @{"username"="customer";"email"="PW Customer email address";"password"="PW Customer password"} $tokens = Invoke-WebRequest -Uri https://your...
  7. sashton

    UK Only - Tesla Energy Plan/Octopus Energy

    Yes, I have started to see small exports around breakfast time but it is still whacking it up to 100% from the grid most mornings and going on to export most of the PV around the middle of the day as the batteries is full by then. If it goes on like this I'll have three EOL PW2s well before...
  8. sashton

    UK Only - Tesla Energy Plan/Octopus Energy

    I have been on the Octopus Tesla Lite tariff for a couple of months now and am in two minds about it. Apart from a cock up where WPD swapped over the MPAN# and my use was showing as export for a few weeks it seems to be working as expected. It does hammer the batteries. There is no benefit in...
  9. sashton

    Beware SMETS2 meters

    After the faulty L&G smart meter was replaced my half hour readings are showing 0 kWh import instead of a steady 0.03kWh / 30 minutes One very happy customer (of Tesla and Octopus). Octopus have offered a compensation package which is slightly higher than I had calculated so the excess will go...
  10. sashton

    Beware SMETS2 meters

    Yup Kaifa MA120 arrived yesterday. The display implies that it also functions as a CAD but after send an enquiry to Chameleon Technology it appears that enabling wi-fi just uploads your usage data to their cloud to use as they like. So now the search is on for a SMETS2 CAD that can be configured...
  11. sashton

    Beware SMETS2 meters

    Meter change tomorrow 08:00. I'm hoping it is another L&G meter as it took ages to find out how to pull data from the E470. I assume switching manufacturer will push me back to square one on that front. Has anyone already had an Octopus meter replacement and knows which one they are replacing...
  12. sashton

    Beware SMETS2 meters

    Their reply this afternoon said they had had a sudden influx on this issue. They seem to have forgotten that I emailed them a year ago about these two issues - 1) this E470 was incorrectly recording use in the wrong time period i.e. I was drawing 20kW one minute after off-peak started and 4...
  13. sashton

    Beware SMETS2 meters

    I received the email. I had already contacted Octopus about the timing issues with the L&G E470 but thought I should re-register this complaint. I was told, after they had a discussion with their 'metering dept.', that they had not received any similar complaints - which is surprising.
  14. sashton

    Beware SMETS2 meters

    The general "leak" of about 60w average into a PW2/BUG2 system as measured by my Octopus SMETS2 meter but not seen by my Fronius MID certified meter is irritating. It probably costs me about an additional £75/year. In addition to that, for about four months of the year I import additional power...
  15. sashton

    2 PWs coming where should be mount them

    Well my installation really looks rough in comparison! My excuses are: the walls are about 900 years old, far from vertical and bonded with soft lime mortar. The only way I could get anything roughly straight was to attach them to 4x2s dropped from the roof joists. The second stack of PWs even...
  16. sashton

    PowerWall - Power Cut ... Grid Restored ... still running on battery

    I had a Backup Gateway 2 which after functioning correctly for three months started to refuse to switch back to grid mode after grid power was restored. Sadly it happened at a weekend and it was at that point I discovered that Tesla do not offer weekend support. Eventually I managed to contact a...
  17. sashton

    Stormwatch in UK

    ...going even more off-topic here... I've just noticed that the Octopus Agile tariff went negative last night for five hours (they pay you to consume power!) and tonight they must be desperate as they are raising the bribe to use power to over 5.5p/kWh … charge your Tesla and get paid for doing it.
  18. sashton

    Gateway 2 and Smart Meter accuracy

    @mikemillar if you're looking at a Pi I can heartily recommend playing with Node-Red. Admittedly I come from a programming background but a few months back I was persuaded to try Node-Red on a Pi and it is surprisingly easy to pick up. There is a Dashboard optional component with which you can...
  19. sashton

    Stormwatch in UK

    *grin* having been brought up a few miles from mikemillar and moved TO a farm in rural Somerset (11kV overhead supply has delivered 17 power cuts this year) I am so glad I changed to a BuGV2 in Jan this year. One thing I noticed is that the BuGV2 claims to be five times as accurate as the...
  20. sashton

    Gateway 2 and Smart Meter accuracy

    Yes, there are two methods for talking to a Powerwall. There is a local API with endpoints on the Gateway. Most of the calls result in status information: - the State of Charge, flows and cumulative totals etc. You can emulate the configuration settings there but I am wary of going down that...
  21. sashton

    Gateway 2 and Smart Meter accuracy

    Thanks for the pointer @mikemillar . It looks like a very useful tool but appears to lack a critical component for my needs: - An API interface. My ultimate goal is an integrated system that manages the power, car charging, heating, DHW etc. without any manual intervention. Some key pieces of...
  22. sashton

    Gateway 2 and Smart Meter accuracy

    I'm sure there are many pay-for services which will calculate your solar yield for the following day but I am still struggling up a steep learning path trying to get an approximate figure using the various free weather services that are out there. My first attempt was using...
  23. sashton

    Gateway 2 and Smart Meter accuracy

    @JohnRatsey A much bigger dislike is the lack of control over off-peak charging ? It really depends on what level of control you're looking for. It seems to play ball with static on/off peak quite well but my issue was trying to get it to work effectively with half hour metering like Octopus...
  24. sashton

    Gateway 2 and Smart Meter accuracy

    I'm sorry I missed the earlier parts of this discussion but it is a subject that has lit up many groups in the old interweb. I started with PW2s on the original gateway and upgraded to the BuGV2 early this year. With the advent of many export harvesting systems it became obvious that few of them...
  25. sashton

    14kWp PV, 3xPWII, BuG v2

    14kWp PV, 3xPWII, BuG v2
  26. sashton

    Powerwalls in the UK

    Applying is generally free. Approval beyond 16A or below is simply a notification process to the DNO but above 16A approval is required before commissioning. Grid reinforcement can be expensive but running unauthorised over spec kit can render your insurance void. It is simple to tell if your...
  27. sashton

    Powerwall feature request: Expert Mode

    Well NuShrike you must have found a method which eludes me for #2 I pull the half hour prices from the energy company easily enough - http://www.bowmill.net/xmenu/cost.shtml but getting the PW to standby and charge accurately within these variable 30 minute windows has me stumped. Yes, I...
  28. sashton

    Powerwall feature request: Expert Mode

    Features which are becoming more and more prevalent in the UK market which appear to be completely absent are: Support frequency response services - to work with aggregators e.g. EDF works with Powervault Support for Half Hour metering - i.e. If rate drops below x/kWh then charge. Charge to x%...
  29. sashton

    New Powerwall 2 - has Firmware 0.3.11.2

    0.3.11.2 is probably pretty recent. Mine is still at 0.3.11 and has been there for a few months now. Tesla should get on with publishing the firmware changes for the BuG 2 as presently it only shows the info for V1. The advanced settings options usually turn up in the app a few days after...
  30. sashton

    Gateway 2

    Differences noted: Firmware appears to be on a different track - current appears to be 0.3.11 but doesn't appear to be updated so regularly (mine has not updated in the last four months) Some local API fields are different but most are trivial It appears to be slightly better at tracking varying...
  31. sashton

    Weather and overnight charging

    PW2s with BuG 2 work just like the original gateway. Differences, apart from the obvious backup capability and reserve, are the firmware versions are different (currently 0.3.11) and the API responses such as grid frequency are posted in different places. Dynamically setting reserve can take an...
  32. sashton

    Was 1.37 now 0.3.11with BUG V2

    ...and a few API changes with V2 (or may just be with changing from a normal gateway to a backup gateway) - site.frequency is now 0 - was the grid frequency so I'm using battery.frequency instead although it no longer correlates so well with the APC reported frequency. same for...
  33. sashton

    Was 1.37 now 0.3.11with BUG V2

    Upgraded the gateway to a V2 BUG. It was a pretty easy swap over but I have now lost the advanced configuration options in the app: TOU etc. Called support and they said they would reappear shortly. It has been twelve hours and no show yet. I guess the V2 gateway has not landed in the states...
  34. sashton

    1.37.0

    Although we run at 50Hz I am interested to see if I run into similar issues this week when our old Gateway is replaced with a new Backup Gateway 2. I have a couple of APC Back-ups pro 1500 covering the NAS/routers/switches and security DVR and am waiting to see how they behave the first time we...
  35. sashton

    1.37.0

    Landed a few minutes ago. No notes published at the time of posting but no ill effects (yet).
  36. sashton

    New Powerwall

    SoundDT It was a coincidence you mentioning the cable sizes. We were discussing the installation of the Backup Gateway 2 today and one of the wire monkeys said he had read a recent recommendation with the new box to stick to the upper end gauge (1.5mm) for the +12 and GND connections. It may...
  37. sashton

    New Powerwall

    Yup, checked today and the recommended max for stacking is three and as mentioned above, there is very little difference in size. On reflection, I will probably just start a second stack anyway as we will probably end up with four eventually as the DNO has signed off another 6kWp PV.
  38. sashton

    New Powerwall

    We finally get a Backup Gateway 2 this week. It is only 22 months late. We have been running with the original Gateway waiting for the UK compliant one to arrive. WPD have delivered fifteen power cuts this year alone so its arrival will not be a moment too soon. It will be interesting to...
  39. sashton

    Weather and overnight charging

    FiT ends sooner than you think: End of the month for new installations.
  40. sashton

    Weather and overnight charging

    In a very similar position here. Whatever Tesla uses to calculate the off-peak charging really doesn't work well in the UK. One bright day and the algorithm overreacts and the subsequent day you can guarantee insufficient overnight charging. The long-promised backup gateway may offer more...
  41. sashton

    Tesla: we need more control over our PowerWalls

    It would be nice to think that Tesla reacts to these forums but sadly I do not believe they do. There are plenty of weather services that provide three-hourly cloud cover predictions. Combine that with recent yield history and you can pretty easily calculate the subsequent days projected yield...
  42. sashton

    Tesla: we need more control over our PowerWalls

    Sadly, I have recently been told that the UK Backup Gateway has been shelved. So we will have no possibility to regulate Tesla's brain dead Cost Saving algorythm by manipulating the backup reservation. I have had my (UK)PW2 for seventeen months and have a chain of emails promising me a UK BuG is...
  43. sashton

    Firmware 1.22.1

    1.22.1 arrived this evening. Powerwall went in to standby and stayed there despite having charge and there being no PV contribution. Had to restart the GW to bring the PW back to life. This has happened on the last four FW updates. I have been putting up with this issue as the release of the UK...
  44. sashton

    All Powerwall Orders on Hold Indefinitely

    I seriously hope this is not an absolute stop across all geos. I received an email eleven days ago that mine would be delivered on Sept 17th. and on that basis I agreed to pay the DNO £16k for network reinforcement (increasing my permitted generator size). ...I think I'll just pop outside and...
  45. sashton

    Time-Based Control?

    Yes, time based controls are available in the UK. I got it with 1.17.2 a couple of months ago still there in 1.20.x. Delivery delays in the UK are not so bad. My additional PWII ordered in April is due in September. There is a slight price to pay when enabling TBC. It appears that when it is...
  46. sashton

    Which insulation do you use with your solar home?

    *grin* I'm not an early reservation holder (April 2017). I don't qualify as an existing Tesla customer (roadster doesn't count neither does the PW II). They didn't even bother to notify me about the Goodwood event - I even called them and they said they would send me tickets as they had some...
  47. sashton

    Which insulation do you use with your solar home?

    It seems that different UK DNOs treat the Powerwalls in different ways. Western Power(who really don't want you to generate your own electricity and if you do they want to extract all the cash they can from you) say they treat each PW II as a uncontrolled 5kW generator wheras SSE apparently...
  48. sashton

    Which insulation do you use with your solar home?

    Slightly different here as we live in a 600 - 1000yr old stone building. The conservation guys will not allow us to insulate externally nor will they allow us to attach anything externally (PV or solar hot water). Luckily the place is large enough for us to "tank" inside each external wall...
  49. sashton

    Vauxhall ampera slow to charge?

    Yes the original Volt and Ampera (derived from the Volt) only had 3.6kW chargers. The inline charger only delivers 1.4 or 2.3kW. Ideal for base overnight charging but not really designed for trip charging. This is more than made up for by the fact that it is a hybrid EV - and IMHO, a bloody good...
  50. sashton

    Firmware 1.20.0

    Thanks for the tips. I eventually bit the bullet and upgraded to Powershell core (6.0.2) and with that they have added a -SkipCertificateCheck optional parameter to Invoke-WebRequest. So no worries about local certs anymore. As an additional bonus, I'm no longer tied to Windows as Powershell...

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