Solar and power wall 3 quote.

[EbS-P]

Check from the utility arrived last week. That covers the a majority of the power wall cost (that includes the inverter and gateway)

So after tax credits and this rebate (not including the $52 per month bill credit). My out of pocket cost is for solar and 13.5 kWh backup is…..
$1.95 per Watt.

 

[stoveliker]

Comparing with my solar only cost you got the battery for $0.49 per Watt

 

[EbS-P]

Comparing with my solar only cost you got the battery for $0.49 per Watt

Of my PV array capacity correct? Is that a good deal? Cost would have been 4k cheaper if I didn’t need a whole new main panel.

 

[stoveliker]

No, lower pv size (7.2 kW) for me. But I was quoting the per W cost.

 

[EbS-P]

First power outage more than 10 minutes. Battery had 25% when power went out at 4:00 am. Now 7:30. Made coffee and warmed some breakfast for the kids and lit a fire. Restorationtime is expected to be 10:30. Sun is coming up and the sky is clear. (Down to 36 last night). We should start getting some solar production in an hour. Battery will last 2-3 more hours. I need to trace down what my biggest phantom loads are. ( the old fridge is the biggest regular load ).

I could have made my instant coffee from the sink hot water but real coffee is better.

 

[EbS-P]

Well second bill came. Used 120kwh from the grid. But with the credits I have a $52 bill credit. I averaged 21 kWh per day for October. (Bill is like October 26 -November 23.). So I had a few 28kwh days at the beginning of the cycle. Yesterday I made 25kwh.

With a $50 credit that’s about 400 kWh. I will say I can make it through January with almost no bill. That would be something I wasn’t planning on. We can’t bank kWh credits but we can carryover bill credits.

 

[gthomas785]

Yesterday I made 25kwh.

Jealous, on 12/1 I made 9.8 kWh. And I think it was a pretty sunny day. Guess that's the difference 8 degrees of latitude makes..

 

[begreen]

It's 5 times better than we generate at this time of the year. Between fog and high latitude, anything we get from the sun is a bonus.

 

[stoveliker]

7.2 kW system, split E and W facing.
9.5 kWh Dec. 1, 10.3 kWh Dec. 2.
Max power (averaged over 15 min intervals as Enphase does) was 2.4 kW.
Both were sunny though a few clouds happened on Dec. 1.

 

[EbS-P]

First grid event tomorrow morning at 6:30. First one. This means the power company gets to control my battery from now (not sure what time it was issued) until I guess my battery goes down to 30%. Says it will start at 6:30 AM ending at 8:30 and there are 83 fleet homes now up from 24 Friday. I’m guessing that about 0.5Mw for two hours.

So it’s pretty cool I guess. My battery would have been down to 30% before 6:00 AM anyway.

FWIW I’m peaking at 7.8 kw. Then I start to get shaded. And down to 1kw by 2 pm.

 

[bogieb]

This is my production for the month so far with my 8,000w system.

Can you tell which of the panels are still covered by the heavy, wet snow we had on Thanksgiving? That is an odd occurrence, but even the west side of my standing seam roof is still covered and a lot of times it will clear before the other sides since there is nothing slowing the stuff down. And, there has been absolutely no melting of the snow in the yard

4-8" of snow expected tomorrow. Hopefully it is a lot lighter consistency this time.

 

[EbS-P]

Discharging at about 5kw. That’s power for me and my neighbor that I share a transformer with. I wonder if with smart meters that is intentional.

 

[EbS-P]

Second virtual power plat event scheduled for tomorrow morning. These things are non events as far as I’m concerned. My battery stayed charged 12 or more hours before discharging to the same soc as regular. So let’s say they do this 40 times at 10 kWh each time….

That works out to paying $1.56 per kWh Or about 40x the base whole sale price. So am I leaving money on the table?

 

[begreen]

S

That works out to paying $1.56 per kWh Or about 40x the base whole sale price. So am I leaving money on the table?

Seems like it, if your system can provide enough to meet that demand.

 

[EbS-P]

S
Seems like it, if your system can provide enough to meet that demand.

Quick loot at Ercot shows that 40x increases over base price are possible during peak demand. Which probably don’t happen 40 days a year. I’m ok with the simplicity of my involvement and the compensation.

 

[bogieb]

I guess I'm confused at how you'd be leaving money on the table if you're being compensated for power draws during these events. I probably didn't follow some of the earlier conversation closely enough (and my memory sux at the best of times anyway )

 

[EbS-P]

I guess I'm confused at how you'd be leaving money on the table if you're being compensated for power draws during these events. I probably didn't follow some of the earlier conversation closely enough (and my memory sux at the best of times anyway )

Is the spot rate higher than what I’m being paid was my point. I don’t have any choice in that matter being a regulated monopoly. I think certain areas may pay customers more for the battery electricity but it might actually be delivered not flat rate.

I’m happy with it it’s a seamless background action. And if the grid goes down they can’t use my power. My minimum power level is enough to run all the essentials for 8 hours. Tesla is probably getting a cut. But may this is just install battery and sign up.

 

[stoveliker]

I think Tesla is getting 20%.
Enphase batteries you get 100% - at least according to the undecided YouTube channel.

 

[EbS-P]

I think Tesla is getting 20%.
Enphase batteries you get 100% - at least according to the undecided YouTube channel.

But Duke has a flat rate based on capacity. Enphase or Tesla it doesn’t matter.

 

[stoveliker]

Okay, so maybe that was only for his power provider in MA

 

[EbS-P]

Okay, so maybe that was only for his power provider in MA

It’s utility dependent I’m sure. And I’m sure Tesla is getting a cut of it. The simplicity of the user end is impressive. The Tesla ecosystem is approaching the level of integration of the Apple ecosystem. Once/if they get vehicle to grid working it will be a game changer.

 

[EbS-P]

Interesting observation today during the Powerwall grid event. Roughly 100 homes participating and delivering a whole whopping 50-60kw to the grid. But one would imagine that’s reduced the grid load by .5 Mw. So basically it’s a load shifting event. If they had better time of use incentives this would be an everyday usage pattern just not when it’s really cold/hot.

 

[stoveliker]

Where does the factor of 10 come from?

 

[EbS-P]

Where does the factor of 10 come from?

I assume the screen shot is reporting total power to the grid of the entire fleet. So between 100 houses they is net flow of 50kw to grid. (Most owners are just powering their own home and then using some grid power once they exceed 5kw consumption (but that’s probably not figured in but I have no clue ). ).

Now the fleet is contributing 0kw to the grid.

 

[stoveliker]

Total power in the screenshot is 0.05 (0.06) MW (60 kW), not 500-600 kW?

I understand that 100 homes times 5 kW is 0.5 MW, but their data indicate that other homes maybe are giving less power than you are doing?