Good news for solar storage

[Obie]

Chuckle Snort

To help power his home at night or on cloudy days, Bakken is buying a battery system built by Pittsburgh-based Aquion Energy. The system includes 46 washing-machine-size batteries each weighing 3,300 pounds.

“They wanted to be able to run with three days of autonomy,” Ted Wiley, vice president of product and corporate strategy at Aquion Energy, said Tuesday. “If it was cloudy for three days, they will be totally fine.”"

Unless my math is wrong,these batteries cost this guy $500,000.00 for his "Hale "

Link:

http://www.fbactinsider.org/supersize-so...n-big-isle

[ericlp]

quote:

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Originally posted by kalakoa

Per article:



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).

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Interesting... So if I'm reading it right? The last line of 100% (Depth of Discharge) mean you can flat line this battery 5K times? Woha! If that really is true, then, that is AMAZING....

Maybe if you take a LA battery that can only be cycled down to 15-20% Vs, this Battery that can go down to 0. that is a 5X more performance, so you would have to times 130 bucks would put it on par to LA batts.

Googled specs...

Based on Aquion’s proprietary Aqueous Hybrid Ion (AHI™) technology, S-Line products deliver a unique combination of performance, safety, and sustainability in a cost-effective battery system.
S-Line Battery Stacks are ~2.4 kWh systems at 48V nominal and can be connected in series or parallel for a wide range of system configurations. The S-Line Battery Stacks serve as the fundamental building block for M-Line Battery Modules and all AHI systems.

S-Line products deliver extremely long cycle life, deep depth of discharge and excellent abuse tolerance. The batteries’ high performance, coupled with ease of integration, safety, and sustainability, makes them an ideal choice for stationary long-duration, daily cycling applications including off-grid and microgrids, energy management and grid-scale services.

Key Battery Characteristics
High Performance: Avoid costly downtime and battery replacements

Very high cycle life
Usable depth of discharge (DoD): 100%
Extremely abuse tolerant
Ability to stand at partial state of charge
Self-balancing
Wide operating temperature range
Minimal degradation
Unparalleled Safety: Inherently safe chemistry

Not flammable, explosive, or corrosive
No dangerous or toxic components
Sustainable: Simple, abundant, nontoxic materials

Environmentally benign materials
No corrosive acids or noxious fumes
Suitable for deployment globally

Excellent Economics: Industry-leading total cost of ownership

Low acquisition costs ($/kWh)
Better value than lead acid or lithium ion
No regular maintenance
Little/no thermal management
No active management required

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Extremely abuse tolerant eh? Wonder what that means? I wonder what the warranty would be like?


To email me click on Link http://is.gd/QMfVEX

[TomK]

"Extremely abuse tolerant eh? Wonder what that means? I wonder what the warranty would be like?"

Are you saying you don't take out your frustrations on the nearest battery? Wow, you're strange!

I have one ton of UPS batteries that should have gone to the summit last week and without them we can't operate, so maybe I'll try this new technique of abuse and see how well it works...

[TomK]

PS. You've all seen this (I hope!).

How to abuse stuff:

https://youtu.be/mv0onXhyLlE

[ericlp]

Well, I know what it means. Most newbies on solar kill a bank of batteries because the drain them down to 50% or 40% over and over and over. This type of abuse will kill a battery or shorten it's life considerably. LA batts like to Float (stay charged up) and only use 15-20% of capacity to get maximum battery life.

So, I really "Wonder" about these newer batteries and very curious about how long they will typically last and what kind of warranty will be provided with them. As with a LA battery you basically get a warranty but if you 'abuse' them (don't ask me how they can tell)... it voids your warranty... Even cell phone lithium ion batts shouldn't be discharged down to zero.


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To email me click on Link http://is.gd/QMfVEX

[microage97]

They kind of suck cause you gotta have a huge bank to get any useable power out of them. They don't give up power very easily or very fast. I guess you can dead short the terminals and come back the next day and the battery is only 50% discharged.

[kalakoa]

You forgot to figure total KWH over the 20 hour rate

That's one of the missing variables for Aquion: I don't see a published C20 equivalent rate.

explains why you need 20 of those racks to get up to that total KWH per day a house uses

Usage footprint for a Puna jungalow is very different than that of a "typical" house.

[MarkP]

I get by with eight 6-volt golf cart batteries in series. That makes a nominal 48 volt x 220 amp-hour bank or a little over 10 kwh nominal capacity although I think you would have to drain them to 0% state of charge to get that. I would like to double that because I think that I am dropping below a critical voltage every night since the charge controller frequently stays in absorption mode the next day instead of going into float mode. It does go into absorption mode usually by 10 am during which time it is throttling power to the batteries so that means I am not making full use of the output of the panels after that. OTOH if it doesn't absorb and float for the required time that means the batteries are hovering in a state of partial discharge which is not good. I have read that it's not THAT bad if you cycle them between 80% and 50% charge for several days as long as you give them a good topping up at least once a week plus the monthly equalization over-charge. A true hands off battery that doesn't require such stage managing would truly be a boon.

[ericlp]

I recommend a honda 200Watt generator to top up the batteries before taking them past 20%. LA batts just are not designed to go down that far. Doing so will degrade the battery. No good.


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To email me click on Link http://is.gd/QMfVEX

[rainyjim]

quote:

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Originally posted by ericlp
...honda 200Watt generator...

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tehe! I'm picturing something the size of a shoebox.