Home Li-ion system

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scalabro
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Post by scalabro » Tue. May. 01, 2018 6:41 pm

Looks like Elon has some competition...



http://www.lgesspartner.com/front/mobile/en/main/main.dev

 
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BigBarney
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Post by BigBarney » Tue. May. 01, 2018 8:50 pm

And one less competitor .... a big company with a good reputation with car buyers

https://www.utilitydive.com/news/mercedes-benz-ab ... ns/522483/

"The market may be ripe, but so far the biggest name remains Tesla. The company offers its Powerwall battery in conjunction with solar panels installed by its SolarCity subsidiary."

And giving up market to Tesla...

"Around 90% of residential solar installations do not have an energy storage component. GTM Research predicts that the market for U.S. residential storage will grow fourfold in 2018. The firm recorded 19 MW of residential energy storage installations in 2017 and expects to see 74 MW this year."


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McGiever
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Post by McGiever » Tue. May. 01, 2018 11:44 pm

And as always, there is a "splinter group" building their own version of PowerWall with added "bells and whistles" to utilize their excess production rather than ship that excess to the grid. They are sending excess production to heat extra stored hot water for later use.

 
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lsayre
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Post by lsayre » Wed. May. 02, 2018 7:11 am

The one closest to my lead-acid battery banks "deliverable" capacity (50% of its total capacity) costs nearly 5X what I paid.


 
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McGiever
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Post by McGiever » Wed. May. 02, 2018 8:56 am

There are a lot of differences between LI-ion and LA batteries, and up front costs difference is but just one difference.
Some buyers will pay the premium upfront costs due to those other factors beyond the initial up front costs.

When any battery's cost to own is realized, including LA batteries, is when reaching their end of useful life. That is when the true costs of their life cycle of kWhrs. delivered is realized, not by their up front costs alone.

Comparing Apples to Apples. ;)

 
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BigBarney
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Post by BigBarney » Wed. May. 02, 2018 12:38 pm

The deliverable capacity of the PowerWall is 100% , all usable...

https://www.tesla.com/powerwall

The one thing that I'm waiting for is the ability to connect the EV car

battery to it and send power both ways either charge the batteries or

run the house off the car . Now the PowerWall can charge the car but

cannot send power from the car to the house. They need the ability to

tap the high voltage battery in the car to do this , the charge port powers

the charger not direct to the battery . You can hookup an inverter to the

12v battery which is charged by the dc-dc convertor and use that a/c power

but it is limited to the dc-dc conversion usually ~ 2KW . My Bolt EV can do

this , You would have to tap the DCFC system to get the full battery voltage.

60 KW battery could supply a house for many days without needing to be

charged , only using essentials like heat and refrigeration.

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Post by BigBarney » Wed. May. 02, 2018 12:51 pm

Homes don't really need the higher capacity of Li Ion batteries and can use

the older technology Ni Cad batteries. These can be found in cars like the

Prius and Leaf , so they can have a second life after car use , which is much

harder on the batteries . That is what Nissan is doing by rebuilding leaf

batteries for cars and the leftover can be put in packs and racks for home

use.

Tesla already knows their batteries can go over 260,000 miles in a car and

have a second use for maybe a decade more .They decline about 8-12% in

their first use and still are good for many years in a less demanding use.

http://evtvindex.blogspot.com/2017/08/august-18-2017.html

http://evtvindex.blogspot.com/2017/03/march-17-2017.html

And there are many more on this site...


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