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  1. T

    PowerWall / Gateway Trip Settings for Off Grid?

    Relevant: https://teslamotorsclub.com/tmc/threads/powerwall-2-transfer-time.153496/
  2. T

    Tesla Virtual Power Plant in CA

    SCE is different. There is a demand response program that pays $2/kWh, but you have to be in a CCA. https://powersaver.sce.com
  3. T

    10kW solar with single Powerwall setup question

    Yes, get the quote for the system with 2 batteries. My timeframe for hoping battery prices go down is 5-10 years, not 1-2.
  4. T

    10kW solar with single Powerwall setup question

    It also leaves it open for you to add another battery in the future without having to invasively reconfigure the existing wiring.
  5. T

    10kW solar with single Powerwall setup question

    You may need to sign a waiver for the design, but having both inverters on the load side (backed up) is possible, but is not recommended by Tesla. There's only one frequency when you're island-ed, so worst case is that both inverters are putting out too much power for the powerwall, and the...
  6. T

    Need help with CA NEM 2.0.

    Also on my SCE bill I have · Net Surplus Compensation option: Exclusion Which I am not clear on, I'm thinking it means I won't get any payment of the wholesale rate for any surplus at year-end. I think this line changed when I added extra solar which pushed me over some tier.
  7. T

    Need help with CA NEM 2.0.

    This is not true for SCE. Minimum Daily does not offset anything, it is a constant. The only reduction there is the twice yearly Climate Adjustment, about $40-$50
  8. T

    Need help with CA NEM 2.0.

    With a CCA, I found they don't accumulate charges, only credits. Since the SCE delivery charges are the higher component of one kWH, over the year you create a credit with SCE faster than generation via CCA. So generation nets to zero earlier in the year, and you lose the ability to offset...
  9. T

    New Powerwall Advanced Options [Toggles for charging from and discharging to grid from powerwalls]

    Another NBC related question, is this correct? SCE - the NBCs are paid monthly PG&E - the NBCs are accumulated and paid yearly at true-up, but you get a true-up reminder every 3 months? Minimum / daily charge is paid monthly for both. Climate credit twice a year does offset NBCs. I prefer the...
  10. T

    New Powerwall Advanced Options [Toggles for charging from and discharging to grid from powerwalls]

    I think the algorithm will change over time. There's a element of usage forecasting going on there too. Should it blindly discharge from the start at max rate down to the reserve, or just pump out a little more than needed to reach reserve around the same time as end of peak power, or wait...
  11. T

    New Powerwall Advanced Options [Toggles for charging from and discharging to grid from powerwalls]

    Are you sure? VPP = Virtual Power Plant (beta) = PoCo driven events, Energy Exports is a daily thing. I ran that for a trial and it just runs the battery down to reserve each day. Other states had varying degrees of extra compensation for VPP export, where Energy Export is going to be purely...
  12. T

    New Powerwall Advanced Options [Toggles for charging from and discharging to grid from powerwalls]

    Anyone in SCE area have VPP in the app? It was visible a while back, and I deliberately turned it off, but I can't see it any more. The app on iOS spins for several seconds every time it starts up now, used to be quick.
  13. T

    Tesla App Solar graph slightly higher than real value (Yes it's the CTs).

    Yeah, I'm in the middle of installing an iotawatt to get better individual monitoring that I can use in automation.
  14. T

    Tesla App Solar graph slightly higher than real value (Yes it's the CTs).

    I always suspected that the Tesla app was over-estimating my solar output, as the home usage graph always had a slight bump up centered on solar noon. (Home usage = PoCo - Solar) This weekend I opened up the panel and checked with my Fluke. The actual situation is more complicated - the...
  15. T

    Increasing Home Insurance with system installation cost?

    It seems risky not to have the solar/battery system included in the home insurance policy, but what are people actually doing? Stated value equal to installation cost, cost after ITC, some other smaller number? "Other equipment" is usually capped at e.g. $5K, so that would never cover the...
  16. T

    Use Black Zigbee Gateway or not?

    For certain (olde?r) SolarEdge inverters, no. The Zigbee connection is the only way that the inverter can get firmware updates (rare, but possible) The hard wire ethernet is OK for Tesla monitoring, but it does not provide monitoring data to SolarEdge/Envoy servers, so they will nag Tesla and...
  17. T

    Can I add more solar with PG&E?

    Yeah. 2.5kWh - 3kWh per day average, 4 person household. temp set to 125.
  18. T

    Validating Powerwall Math

    You may need to go to 3 PW to match your excess output. There will be new incentives as well due to Virtual Power Plant events where you get paid even more to discharge during peak, but 5 year payback would be a go / do-it for me.
  19. T

    Power strip with capacitor?

    100ms is 16 cycles of the AC. A passive capacitor can only work for 1/4 of a cycle, so it needs active electronics of some kind, which makes it into a line-interactive UPS. A big enough capacitor to hold enough power would be huge, so you still need a battery, lead acid or lithium So a...
  20. T

    Can I add more solar with PG&E?

    Tangental question - does the Rheem app for you show per hour consumption? Mine generally shows zero usage every other hour, and 2x what I'd expect on the others. There are rarer times it will show usage during adjacent hours though. It's not a huge deal since the daily total seems to be...
  21. T

    Will it fit: Powerwall+

    I'm concerned there would be not enough clearance on the left hand side to see and wield a screwdriver to land the wiring into the powerwall. Does the PW have a choice of where the wiring comes in? Agreed, that's less than an hours work for someone experienced. Totally worth it.
  22. T

    CPUC Nem 3.0 discussion as it relates to Energy Products

    Yes, that's still part of the point. Worst case, on the coldest night (10-15 a year in Chicago), performance is the same, and only worse for older heat pumps. Every other day, or with a modern system, it's a win. If you live in those climates, just limit your choice to an effective...
  23. T

    CPUC Nem 3.0 discussion as it relates to Energy Products

    I think there's a red pill moment here. Is heating faster actually a requirement? and cheaper is true currently only if you ignore the externalities of burning NG, and ignore that NG gas prices will go up but your locally sourced solar electric will not. Mini spilt heat pumps have worked well...
  24. T

    CPUC Nem 3.0 discussion as it relates to Energy Products

    Watch the latest YouTube from Technology Connections - he explains that Heat Pump heat from electricity made from NG is /still/ more efficient that pumping that NG to your house and burning it locally for heat.
  25. T

    Best way to connect 17kW of solar PV to one Powerwall?

    Yeah, without the grid, the voltage on the inverter output is going to rise higher, which is going to push electrons into the battery; the gateway has to disconnect the battery or stop the solar, or both.
  26. T

    Best way to connect 17kW of solar PV to one Powerwall?

    If the Solar was all feeding into the gateway, it will know it can't sink it all to the battery + house, so will immediately frequency shift to curtail the inverters, but if that doesn't work it will shut down the whole system. Then every 10 minutes or so it will wake up and try again. So worse...
  27. T

    Best way to connect 17kW of solar PV to one Powerwall?

    Your system design would have to thread the rules for both Tesla (5kW-7kW max recommendation), and panel bus bar capacity (city/inspector) The no-risk design is going to be to put the extra panels before the gateway, and the only mitigation there is to re-arrange the strings so that you have up...
  28. T

    How long should a Powerwall maintain power in a standard 1800 sqft SFH in the event of a power failure?

    I never understood how the Tesla math works there. Given sufficient panels, If you have enough storage to last you till sun-up + 1 hour the next day, you're at infinite backup time. Even in Winter, you're only looking at a few hours per day outage while the neighborhood is suffering during an...
  29. T

    Question about Solar Design

    I think it makes sense in Southern California to use that North side, if there's no way to squeeze more on the South. It'll be a trickle in Winter, but in Summer it should give you enough to carry you through the hottest part of the day avoiding pulling peak priced power. (via pre-cooling if...
  30. T

    SolarEdge Inverter Replacement

    I had this problem in March last year. Tesla doesn't stock spare SE inverters, and I listened in as the Tesla person talked with SolarEdge support on the phone for 30 minutes trying to get them to understand that it was indeed, broken and needed replacing. The Tesla person even swapped in...
  31. T

    Need recommendation on 200A panel

    I like the plan of doing the panel upgrade separately / prior to solar/batteries. If it's done as part of the solar installation, often you don't get a choice of what brand/type it is. For mine, they went to the supply house that morning and came back with whatever they had in stock...
  32. T

    HOA Rules and Solar

    Join the HOA board and start a serious discussion about how the townhouses should incorporate solar on an individual or shared cost basis, get some ideas written down. If there's a clubhouse or similar, start with proposing solar there, as a cost savings investment.
  33. T

    Tesla solar installed today. Can I turn on

    This is most likely the 2nd case then - you /can/ export, but the meter will see it as if you were consuming it, so you get charged for what should be a credit.
  34. T

    Tesla solar installed today. Can I turn on

    There are 2 worst case scenarios that come to mind: * Electric company needs to upgrade a local transformer to support your usage, local solar production causes an early demise. (Very slim chance, but your liability is not zero). * Electric company bills you for solar back feed as if you had...
  35. T

    What devices do you have UPS connected even though you have a PowerWall?

    How old is your FIOS ONT? Mine has a battery, but specifically it only powers the POTS connection during an outage. There's a workaround documented somewhere that you can flip a couple of wires in the connector to make the battery power the whole ONT, but that cable is really stiff and...
  36. T

    What devices do you have UPS connected even though you have a PowerWall?

    With a Powerwall, there's going to be a sub-second loss of power when it switches over. Very few computer equipment that doesn't already have an internal battery can ride that out, so I'm guessing that most people still have small capacity UPSes on critical devices in their house. Even more...
  37. T

    Larger PV systems with different inverters

    Flipping the breaker for either inverter is sufficient, but the Solaredge does have a control toggle on it that would be less invasive, leaving it connected but not producing. The enphase doesn't have any similar physical control, and the app while great is monitoring only. So I think yes, in...
  38. T

    Larger PV systems with different inverters

    Here's the nuance with my system. I did a quick test flipping the main breaker when I had 80% SOC, and more solar generation than 1PW can sink. It curtailed and went into battery only mode (zero solar). That's what you'd expect to see with a 100% SOC on any system, but the issue with mine is...
  39. T

    Used prices for Powerwalls?

    Yeah, this is $7000 * 2, no gateway, not $7000 for the pair, so not a great value. Assuming my installer agreed though, it messes up the warranty they provide on the existing PW with the additional PW that would have no warranty from them.
  40. T

    Used prices for Powerwalls?

    Anyone know the going price for used Powerwalls? There's a pair for $7000 each near me, used for 1 year. Not sure if that's a good deal.
  41. T

    Larger PV systems with different inverters

    I had to convince the installer that this is what I wanted. But it's no different to when the powerwall is already at 100% and can't sink any solar output, it would curtail by shifting frequency. I'm expecting my worse case to be, the system shuts down, I have to turn off half the solar and...
  42. T

    Larger PV systems with different inverters

    I have multiple systems, 2 sets of enphase microinverters going into an enphase combiner, and a solar edge, from different sets of panels. They take different amounts of time to come up from cold if they've been turned off, but I don't know yet how they'll behave with the gateway/powerwall...
  43. T

    How much power does your home draw overnight? (Baseline energy use)

    They haven't updated that page in years. We're on Frontier fiber (used to be Verizon FiOS), but it's just plain Cable as far as premium channels are concerned. JapanTV took years to switch from SD to HD as well. The signal is transmitted from Japan to USA via Satellite, but that doesn't...
  44. T

    Can I add more solar with PG&E?

    Yes, it's the same 26% ITC. But with a system cost easily over $6000, it just makes sense to use that roof space for more PV.
  45. T

    Can I add more solar with PG&E?

    I looked hard to find a solar hot water solution too, but current regulations in California require a glycol loop (indirect heating), which means two tanks. Rheem has a combined indirect with gas backup, but it's not low enough emissions to be usable in Southern California. The cost ended up...
  46. T

    How much power does your home draw overnight? (Baseline energy use)

    90% of what we watch is on an international subscription channel that is only available on cable or directtv (tvjapan.net). Maybe one day that company will do a streaming tier, but no idea when.
  47. T

    How much power does your home draw overnight? (Baseline energy use)

    What do you estimate the hot tub usage is per day? I count 17 spikes there, so if they are e.g. 15 mins each, that >20kWh per day.
  48. T

    How much power does your home draw overnight? (Baseline energy use)

    Yeah, this is a non-negotiable for my wife, we've been running Win 7 Windows Media Center with a cable card for 15+ years, her programs are scattered throughout the day. We had a Tivo in the early days, could be a possibility to go back.
  49. T

    How much power does your home draw overnight? (Baseline energy use)

    The 300Watt is per hour, that's what I've added up using a Kilawatt and UPS front panel load meter. So the remainder is on circuits that I can't easily measure individually (e.g. 240V air handler, fridge socket behind fridge). I have a large steady load of about 150 Watts in that from my...
  50. T

    How much power does your home draw overnight? (Baseline energy use)

    Single Family home. .6kW to .8kW at night. I think this is too high, still trying to work out what is adding up to this. WiFi/Network and TV stuff only add up to about 300 Watts, fridge should be mostly idling at night. I want to get an energy monitor system that does multiple circuits, but...

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