Author Topic: Tesla Solar Rental - No removal cost in Sept  (Read 1292 times)

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Offline Kings

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #30 on: September 18, 2019, 01:22:55 PM »
For example (hypothetical numbers), I generate 10kW during the day and the rate is $0.40/kW so I create $4 credit? And at night, if I use 10kW and the rate is $0.20/kW, I only use up $2 of that credit?

if you were to net generate a flat 10 kW when the rates are $0.40/kWh, then yes you would receive a credit on your bill for $4 for that hour.  same for the hour using 10 kW at $0.20/kWh charging you $2.  unfortunately, with the new tou periods, your ability to generate electricity with solar is very low during the $0.40/kWh tou period (4 pm - 9 pm), as the sun is on its way out.  too much solar on the grid has caused sce and other investor owned utilities to change their tou periods because there is a big drop off in renewable generation put onto the grid when the sun goes down and when people get home and blast their air conditioner and run their appliances.

Hmm... makes buying seem better. Are there restrictions to the credits? I know you guys mentioned that these plans change all the time but can SCE change the exchange rate?

your system must be sized "appropriately" for your consumption (i.e. you can't build a system that generates you 5x your annual consumption).  at a certain point, you no longer receive full value (i.e. $0.40/kWh) for your generation if you generate too much.  and yes, rates change as often as quarterly.

EDIT: Stuff I read on SCE says they just use kWH generated/consumed... but does mention TOU. Confused.

kWh at different tou periods return different $ values, as you explained in the initial part of your post.  this will all be totaled at the end of the month for you on your bill.

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Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #31 on: September 18, 2019, 01:56:53 PM »
Hah. That’s why TOU changed.

I’m on an old plan that ends at 6pm.
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Offline Kings

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #32 on: September 18, 2019, 02:02:52 PM »
Hah. That’s why TOU changed.

I’m on an old plan that ends at 6pm.

Quote
The utilities and several major environmental groups see time-of-use rates as a valuable tool to help clean up the state’s power supply. California has a growing abundance of cheap solar power during the middle of the day, so much that utilities sometimes have been forced to pay other states to take it. But the sun goes down every evening just as people get home from work, forcing utilities to fire up expensive, polluting gas plants.

Time-varying rates are meant to encourage homes and businesses to shift their power use away from high-demand periods, when energy is dirtier and more expensive, and toward low-demand periods when energy is cleaner and less expensive.

https://www.latimes.com/business/la-fi-time-use-electricity-rates-20190103-story.html

Offline eyephone

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #33 on: September 18, 2019, 02:06:43 PM »
That’s why I mentioned the battery.

Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #34 on: September 18, 2019, 04:55:05 PM »
So the utilities should start buying Tesla Powerwalls to store that excess clean energy for evening usage.
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Offline eyephone

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #35 on: September 18, 2019, 04:56:14 PM »
There’s a DIY battery storage video (at your own risk)  ;)

Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #36 on: September 18, 2019, 06:35:59 PM »
There’s a DIY battery storage video (at your own risk)  ;)

Hah. I’ll just string together a bunch of Eneloops from Costco.
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Offline woodburyowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #37 on: September 18, 2019, 08:23:45 PM »
Looks like I can also plug in an EV directly into the Solar Edge single phase inverter.  Saves me the cost of getting an EV plug installed.

This is a bonus. So would this pull from the grid at night?

I looked into this and while it sounds attractive, for me it was impractical. My inverter is installed outside my house whereas I want to park my car inside the garage. I don't want to run a charging cable all the way around. Plus the only benefit of it is if you can charge during the daytime which most people work.

Any particular reason why you installed the inverter outside your house vs. inside? 

Also with a TOU plan, it's always better to charge during non-peak hours.  With net metering all that matters is when you are using the electricity.  The generation is separate and doesn't matter if you use it at the same time or if you send it back to the grid.

The advantage is that you have less energy loss conversion from DC to AC etc if you charge directly from the inverter. So you gain some efficiencies so it does make a difference.

The Solaredge inverter spec sheet states 99.2% maximum efficiency / 99% CEC weighted efficiency.  Sounds more like a rounding error unless I am misinterpreting this spec. 

Offline Cares

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #38 on: September 19, 2019, 09:53:46 AM »
Looks like I can also plug in an EV directly into the Solar Edge single phase inverter.  Saves me the cost of getting an EV plug installed.

This is a bonus. So would this pull from the grid at night?

I looked into this and while it sounds attractive, for me it was impractical. My inverter is installed outside my house whereas I want to park my car inside the garage. I don't want to run a charging cable all the way around. Plus the only benefit of it is if you can charge during the daytime which most people work.

Any particular reason why you installed the inverter outside your house vs. inside? 

Also with a TOU plan, it's always better to charge during non-peak hours.  With net metering all that matters is when you are using the electricity.  The generation is separate and doesn't matter if you use it at the same time or if you send it back to the grid.

The advantage is that you have less energy loss conversion from DC to AC etc if you charge directly from the inverter. So you gain some efficiencies so it does make a difference.

The Solaredge inverter spec sheet states 99.2% maximum efficiency / 99% CEC weighted efficiency.  Sounds more like a rounding error unless I am misinterpreting this spec.

So when your panels generate solar energy and feeds back to the grid for credit you don't get 100% of the generation. But if you directly charge from the solar energy generated you get 100% of the generation. It might be negligible but it is better than nothing. Either way, I'm not a fan of it and it doesn't charge as fast as my 60 amp installation.

Offline eyephone

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #39 on: Yesterday at 11:27:56 AM »
I might do the monthly.

Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #40 on: Yesterday at 11:33:06 AM »
I might do the monthly.

Resistance is futile. :)
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Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #41 on: Yesterday at 11:37:11 AM »
I went to a Tesla showroom and talked to them about it.

From what the rep told me, the Tesla Powerwall(s) are not available for rental.

Additionally, they do the whole quote online, they use sat images to determine the viability of your roof and how much usable space they have. They also are limited on type of roofs (she said the spanish curved type tiles usually won't work).

For a medium home (4-5 br) with 2 Tesla Powerwalls, the ballpark quote was ~$25k (including Fed discount).

Next call will be to akkord's contact. Wife still wants to do the bathrooms but she is sold on the battery option to keep the lights on.
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Offline eyephone

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #42 on: Yesterday at 11:39:06 AM »
The key is I can walk away with no penalty. (If I need more panels, no problem or too big of a system no problem)

If I sell or rent the place. (No problem - I don’t have to worry about paying to remove or the existing solar panel balance)

If better panels come out a couple years from now under the program. Yo replace my panels. (No problem, not 100% sure but I think that’s what the guy mentioned)
« Last Edit: Yesterday at 12:02:42 PM by eyephone »

Offline woodburyowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #43 on: Yesterday at 12:14:44 PM »
The Tesla Solar Rental program is an absolute no brainer for those who have avg bills > $75 /month (there will be $10 connection fee with SCE).  Mine is set to get installed in the next week or two.  The only thing I had to take care of was the HOA permitting (cost + form filling).  Everything else, Tesla took care of.

There is a referral program so if decide to do the rental, let me know :)

Offline irvinehomeowner

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Re: Tesla Solar Rental - No removal cost in Sept
« Reply #44 on: Yesterday at 12:35:02 PM »
So Tesla makes money on the rental and the utility credits?

I think the ownership path makes sense if you plan to stay because you can net out within 5-7 years and then it's "free" electricity after that.

On the rental program I'll have to pay $130-$195/mo (which can be increased) in perpetuity.
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