+- Punaweb Forum (http://punaweb.org/forum)
+-- Forum: Punaweb Forums (http://punaweb.org/forum/forumdisplay.php?fid=3)
+--- Forum: Punatalk (http://punaweb.org/forum/forumdisplay.php?fid=10)
+--- Thread: Good news for solar storage (/showthread.php?tid=15673)
Good news for solar storage - Peter Epperson - 03-11-2015
Kiholo Bay may be the epicenter for the development of practical solar energy storage.
https://gigaom.com/2015/01/09/a-next-gen-battery-to-land-in-hawaii-courtesy-of-aquion-energy/
RE: Good news for solar storage - kalakoa - 03-11-2015
One can only hope that this product will actually be made available to individuals.
Despite all the promising technology on the horizon, my next system will probably be conventional/obsolete lead-acid, simply because these are actually for sale.
RE: Good news for solar storage - kalakoa - 03-11-2015
Per article:
Aquion’s battery can start selling its batteries for $500 per kWh (on par with lead acid batteries)
An L16HC is 6V * 420Ah = 2520Wh (2.5KWh). Last I checked, these sold for $330, which is about $132/KWh.
USBattery specifies a 5K cycle life at 15% DoD.
Aquion claims 5K cycles and 100% DoD (but not together).
Google searches only return the corporate website and some regurgitated press releases. Hopefully the various new technologies will shake out into the real world; for now, they remain "promising".
RE: Good news for solar storage - kander - 03-11-2015
kalakoa Im glad your not the only one that caught the spin on the price per KWH. The type of battery they are talking about is nothing more than the old dry cell. Perhaps they have improved the design some so they can actually be charged efficiently.
RE: Good news for solar storage - Ino - 03-11-2015
I been tracking this for a long time and it's beginning to look like it's almost here; Don't under estimate Elon Musk!
http://offgridquest.com/news/tesla-motors-announces-a-new-home-batter
As soon as I can I'm going solar off grid.
If Florida's NextEra is successful in buying HELCO we could be facing this;
http://ililanimedia.blogspot.com/2015/01/nextera-and-seven-sisters.html
It's not illegal yet to go solar off grid here. Can you believe there's only 3000 solar rooftops in Florida?
http://www.latimes.com/nation/la-na-no-solar-20140810-story.html#page=1
RE: Good news for solar storage - PaulW - 03-11-2015
It's always "almost here". Let me know when it IS here.
RE: Good news for solar storage - knieft - 03-11-2015
I got an email reply from the BI Aquion distributor as follows (I haven't responded yet):
"Aloha Kirt,
We will be receiving a new shipment of the Aquion S-20+ stacks in April. The price is around $1,200 each and most homes need a minimum of 12 stacks or more. Please describe your existing system and what you expect in terms of performance and we will be able to properly size the battery and give you an accurate quote.
These batteries are truly unique, with many advantages, but they also behave a little differently so the design process is new.
Thanks for your interest.
Peter"
Peter Shackelford, President
Renewable Energy Services, Inc.
45-487 Lehua St. Honokaa, Hi. 96727
P.O. Box 1518 Honokaa, Hi. 96727
Office 808-775-7410
Cell 808-217-2249
peter@renewablenergy.com
www.renewablenergy.com
Hard to accurately spec out at this point, but it appears it is not anywhere near as cheap per KWH as lead acid.
Exciting that it is an actual product, though the pricing so far is not.
Cheers,
Kirt
RE: Good news for solar storage - kalakoa - 03-11-2015
An S-20 is spec'd for 2.4KWh at 48V nominal, which is roughly equivalent to 8 x L16HC in series.
$330 * 8 = $2640 = $1056/KWh. (Previous $132/KWh figure obviously incorrect for 48V.)
I wonder what "behave a little differently" means with respect to charge controllers...
RE: Good news for solar storage - knieft - 03-11-2015
Must be something weird if "most homes need a minimum of 12 stacks or more"...
Kirt
RE: Good news for solar storage - kander - 03-11-2015
You forgot to figure total KWH over the 20 hour rate for lead acid. the 8 LT16 provide the equivalent of 17.5KWH so the lead acid cost is actually 150.00 per KWH.
It also explains why you need 20 of those racks to get up to that total KWH per day a house uses.
It will be interesting to see how this battery technology works out. Seems the only real market they have is solar/wind/backup power those stacks are a little bit bulky for anything else.