[RE-wrenches] Powerwall and other Li

[August Goers]

Hi Hilton,

We've done the math for our installed cost on the Powerwall 2. Certainly,
it wouldn't make sense to purchase it just for energy savings alone with
current California residential electricity tariffs. However, most folks are
buying it primarily for backup purposes and then a little bit of utility
savings is just icing on the cake or what storage folks are calling
"stacked benefits." The SGIP for many of our clients is over $5k per
Powerwall (now a little lower) and many clients are pairing with PV and
taking the 30% Fed tax credit. All in all, it is a very good deal.

August

On Tue, Feb 13, 2018 at 3:35 PM, Hilton Dier <hiltondier at gmail.com> wrote:

> Has anyone calculated a lifetime cost per stored and delivered kWh for any
> of these lithium battery systems?
>
> From the rough numbers I’ve come up with in the past it seems like daily
> cycling to avoid grid use would be a dead loss. The capital cost vs
> capacity and cycle life doesn’t add up.
>
> Also, I know mentioning this is out of line per list etiquette, but could
> people refrain from including 20 preceding messages in their posts? I tend
> to read this on my phone and my scrolling finger is getting shorter. Thanks!
>
> Hilton
>
> Hilton Dier III
> Renewable Energy Design
> Missisquoi River Hydro LLC
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