Re: [RE-wrenches] solar lease questions

[Darryl Thayer via RE-wrenches]

Hi all,  not enough information.
Does her grid allow export?
Does she have a period of poor sun?
What is her daily or monthly consumption?
Is there an AC  or DC limit on connected solar power?
Will her AHJ or Utility allow line side tap?
The system seems to be poorly designed.  Power Walls are AC coupled, the
large array would clip all day and only have advantage in the shoulders, a
smaller array and bigger inverters?
This design depends upon Utility and AHJ   thank you have a nice day.

On Sat, Dec 17, 2022 at 5:35 PM jay via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> HI All,
>
> I”ve got a friend in hawaii, big island near Kona  that is looking at a
> sun run lease and she’s asking me questions.
>
> I’m not that familiar with the electric rates nor the games that Sun Run
> is doing.
>
> They are pushing a 20 yr lease with the following system:
> 38 x 400 watt panels
> 2 x SE 3.8kw
> 2 x power wall
> it will offset 120% of her load
> loan is $398 month/ 20 yrs which is $95,000
>
> My first really big question is thats 15.2kw on 7.6kw of inverter?  That
> doesn’t sound right, 2 x DC/AC ratio?
> Does it make sense to have the batteries?
>
> And if you paid for the system outright, what would that be in Hawaii?
>
>
> Any and all help and advice is welcome,
> or if there any installers near there, that would also be helpful.
>
>
> thx
> jay
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Re: [RE-wrenches] solar lease questions

[Marco Mangelsdorf via RE-wrenches]

Hey Jay,

I've been doing PV on the Big Island since 2000.

15 kW STC DC on 7.6 kW AC is ridiculous and not atypical typical of
Sunrun's crank-out-the-design-by-some-computer-program approach. When said
program calculates a 120 percent offset, does that factor in power output
clipping? I think not. Especially on the Kona side, which is sunnier than
the east side of the island, such a DC-AC ratio is pretty much sure to clip
A LOT I'm thinking.

Our current residential electric rates here on Hawaii Island are between
42.5 to 47 cents/kWh.

Aloha,
marco

On Sunday, December 18, 2022, jay via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> HI All,
>
> I”ve got a friend in hawaii, big island near Kona  that is looking at a
> sun run lease and she’s asking me questions.
>
> I’m not that familiar with the electric rates nor the games that Sun Run
> is doing.
>
> They are pushing a 20 yr lease with the following system:
> 38 x 400 watt panels
> 2 x SE 3.8kw
> 2 x power wall
> it will offset 120% of her load
> loan is $398 month/ 20 yrs which is $95,000
>
> My first really big question is thats 15.2kw on 7.6kw of inverter?  That
> doesn’t sound right, 2 x DC/AC ratio?
> Does it make sense to have the batteries?
>
> And if you paid for the system outright, what would that be in Hawaii?
>
>
> Any and all help and advice is welcome,
> or if there any installers near there, that would also be helpful.
>
>
> thx
> jay
> ___
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
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Re: [RE-wrenches] solar lease questions

[Kirk Herander via RE-wrenches]

So the SE 3800 x 2 are AC coupled to Tesla power walls? I thought PWs had
built-in ac coupling.
And is it correct there is no AC sell back to the grid in HI? Then
batteries are a must.

Sorry if these are dumb questions. We are recovering from a heavy wet snow
here.



On Sat, Dec 17, 2022 at 6:35 PM jay via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> HI All,
>
> I”ve got a friend in hawaii, big island near Kona  that is looking at a
> sun run lease and she’s asking me questions.
>
> I’m not that familiar with the electric rates nor the games that Sun Run
> is doing.
>
> They are pushing a 20 yr lease with the following system:
> 38 x 400 watt panels
> 2 x SE 3.8kw
> 2 x power wall
> it will offset 120% of her load
> loan is $398 month/ 20 yrs which is $95,000
>
> My first really big question is thats 15.2kw on 7.6kw of inverter?  That
> doesn’t sound right, 2 x DC/AC ratio?
> Does it make sense to have the batteries?
>
> And if you paid for the system outright, what would that be in Hawaii?
>
>
> Any and all help and advice is welcome,
> or if there any installers near there, that would also be helpful.
>
>
> thx
> jay
> ___
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
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>

-- 

*Kirk Herander / **kirkh@vermont.solar *

*Owner|Principal, VT Solar, LLC*

*Celebrating our 31st Anniversary 1991-2022!!*

*www.vermont.solar*


dba Vermont Solar Engineering

802.863.1202
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[RE-wrenches] solar lease questions

[jay via RE-wrenches]

HI All,

I”ve got a friend in hawaii, big island near Kona  that is looking at a sun run 
lease and she’s asking me questions.

I’m not that familiar with the electric rates nor the games that Sun Run is 
doing. 

They are pushing a 20 yr lease with the following system:
38 x 400 watt panels
2 x SE 3.8kw
2 x power wall
it will offset 120% of her load
loan is $398 month/ 20 yrs which is $95,000

My first really big question is thats 15.2kw on 7.6kw of inverter?  That 
doesn’t sound right, 2 x DC/AC ratio?
Does it make sense to have the batteries?

And if you paid for the system outright, what would that be in Hawaii?


Any and all help and advice is welcome,
or if there any installers near there, that would also be helpful.


thx
jay
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