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Got the check this week. (2) PW2's in National Grid. $1450 this year vs $1565 last year but that aligns with the lower averages we had seen, my math had me at $1455, so close enough for rounding error.

I got $234 on two units, so you did better than I did. Backup-only should not impact grid services. I have no idea what happened with the winter events and they don't seem to want to reply to my emails, so I'll take it with them just sending a check at all. Its correct-ish for the events that...

We saw something similar, not ideal, but they only promise to not call events during winter storms (not during summer storms) so like you flagged this is really only on Tesla's side to resolve via Storm Watch. I did notice it seems like they are trying to bail out of the winter payments - the...

This matches what I have seen, you can predict the events by seeing the charging behavior. Odd that they do not use the VPP branding, not sure if that is an Eversource vs Ngrid thing or just when you enrolled or something.

Looks like a 2hr event today 4PM-6PM by the fact that its discharging a full 10kW. The 2hr events are great for the average. BTW no email or check from them for winter... I plan to ping them mid next week after the holiday rather than get stuck at bottom of their inbox.

Looks like there will be an event today. Here is how I can tell: 1. My unit is staying charged to 100%, not dropping down to 99/98/97 2. Under power flow then graph, if I trigger Grid services, I can see that this morning's recharge counted as grid services. Yesterday's (not a DR day, not sure...

I got a 3hr event on 1/29 and this odd 30 min event on 1/12. I emailed Tesla about the 1/12 event and they never replied. So not expecting much for this winter. Maybe $200-ish on two PW2's. No payment yet, they paid last winter at end of June, so would not worry about it until then. They...

No, you can't get the SMART incentive if your PV is under SREC.

Received my summer 2020 incentive payment today. Was for $1565 for two powerwall's, I had calculated $1563 based on the data I had exported from the app, so based on some rounding errors (probably due to the 5 min data from the app), basically exactly the same. Pleased with the data matching...

I don't understand what the PW's get you in this situation. They only holding 27kWh of power, which basically only counts in your favor once, plus the recharge and efficiency losses. Your net meter is measured on a monthly basis, the daily powerwall cycling does not help you there other than...

You get paid for the full discharge wattage of all called discharges ("grid service" events), even if you self-consume some of the power. You don't get paid for discharges that you do yourself if you have it set for self-powered mode when you discharge daily for time-shifting PV production.

Basically what I am saying is that the PowerWall discharge really doesn't matter in the grand scheme of things, other than calculating what Tesla owes you. So I just ignore that in my overall PV calculations. The Sense would measure the PowerWall discharge, but it can't tell the difference...

I do have a Sense but I don't think it would be able to figure this out. Its also on my "heavy load" panel which is not backed up by the PowerWall's. I basically never use it anymore. I use my Enphase monitoring for solar production and whole-home consumption (I actually have a google sheet...

Did finally get my rebate today for the Summer (Tesla sent an email on Wednesday saying they have been mailed). I got a little screwed by how I got enrolled prior to my installation, but that was something I had asked for to de-risk the program (as in, I was only willing to proceed with the...

Yes, you can both export a CSV and inside the app see a graph and sum for each source/destination. So if I go to yesterday, and choose to graph only Powerwall data, it shows me 0.6kWh. Its one of the more well-done solar app implementations (better than Enphase or SolarEdge's app's) but its...

You still get net metering credit, it just does not count towards the discharge incentive. How this works with the battery is basically you get your generation (SMART/SREC) credits immediately. You get your net metering credits when you discharge. So you are always sitting on 26kWh of net...

Correct PowerWall is an AC connected system, even if you do Tesla Solar (usually with a SolarEdge string inverter with optimizers), so that point does not apply. On a SMART (not SREC) PV install, the Solar inverter AC power will go through the AC generation meter before connecting to the...

This state is during an outage, not during a discharge event. During an outage, you are disconnected from the grid, so there is no place to export it. See further down in my message for the behavior during a discharge ("Grid Services") event, it does go to the grid, in MA at least, you do not...

This answers your last question as well, but it's because Tesla is taking a 20% cut here. When you fill out the program application with Tesla you have to choose to have them send the incentive to Tesla. So your utility will send the $225/$50 to Tesla, but Telsa only then sends you $180/$40...

I had 2 Powerwall's installed under this program last summer, we are in National Grid territory, its the same program basically but started earlier. We had a somewhat complex install due to our panel configuration and found it less expensive to use MassRenewables for it and they were also more...

Looks like NationalGrid has finally put something up on their site: ConnectedSolutions | National Grid Full program guide which describes exactly how its calculated (note this is what NationalGrid pays Tesla, but Tesla takes a cut before passing it along to you)...

It's measured as the average kW you discharged from the battery during all of the time that they asked you to discharge for demand response reasons, then multiplied by $220/year. So it could be as high as 5kW per PW2, if the events were short enough to get full output, but they are not so it...

I do not fully understand it, but I think this is all based on the ISO-NE day-ahead market, so the price is fixed the night before and they will commit to the 2 OR 3 hours they chose. I suspect this is also related to the implementation with Tesla, as in it will be a batch the night before...

Right, but note that most events will be 3 hours, and the FAQ says they will only discharge you to 20%, so you will not be able to average 5kW over a season, so that is why its more like $700 than $1k.

My understanding is that Tesla is taking a cut of this and the net payment to PW owners will be $220/kW (so they are taking about $55/kw) annually. That's what I heard a couple weeks ago, before this was announced, but it lines up with some math I posted on Reddit here: National Grid Virtual...

Tesla side of the program finally live today: MA Virtual Power Plant | Tesla

I really wasn't arguing for SolarEdge due to efficiency - was just pointing out that it is not worse than Enphase despite the fact that it seems like it might be due a double conversion. (Likely because the large-scale conversion is much easier to do at high efficiency than the small scale).

I managed to find this which describes some of the details of the program. https://files-cdn.masscec.com/NGrid Eversource Powerpoint .pdf This specifically says existing owners can participate (see last slide)

I don't think there are any shading issues with the SolarEdge optimizers (which I believe is basically a DC-DC converter). You trade-off the failure mode of the sum of the string inverter plus the optimizer instead of a single failure of the microinverter (since the reliability of the passive...

I actually have a Enphase install, but the major issue with Enphase that I see is that your DC:AC oversub is at a per-panel basis instead of the entire inverter. Particularly for our location which has a 10kW-AC max for single phase installs to be net metering cap-exempt, that means your ideal...

The application form I was sent by MassRenewables does say something about applications for units installed before April 2019 do not need a quote attached, that would imply to me that existing installations will qualify, but we won't know for sure until it officially launches. Personally since...

They will run your 100A service entrance into the Powerwall "Gateway" which is like the DPST ATS that disconnects you from a grid. On the output lugs of that they will run a new cable into your panel, and one to a new "generation" panel where they will combine together the Powerwall plus your...

I heard that the Demand Response program for energy storage in MA will be launching very soon and will include Powerwall support. I guess the numbers are not finalized yet but something along the lines of "close" to covering the cost of the unit over the 5 year rebate commitment assuming you...

Here is an article that discusses the storage incentive included in the 3-year plan: Massachusetts Is First State To Make Battery Storage Eligible for Energy Efficiency Incentives

An Sonnen even more, I was quoted $20k for 8kWh installed.

A few things missing: Exists today - 30% ITC credit (this year) if used along with Solar. I see a lot of posts saying it has to be installed at the same time as Solar, that's not my read, but I believe it does have to regularly cycle, which I believe Tesla complies with in "solar mode" Exists...