Thats about as much voltage sag as a Fork Lift battery has at 35 amps @ 48 V.
Aquion Energy up and coming battery....opinions please
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A boost from a small LFP battery pack would help alleviate the problem and extend the range of the AHI pack. Would also help with efficiency, as AHI isn't as efficient with higher current draws.
The alternative is to run the generator more frequently.Comment
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Since the Schneider Engineers were on site and set this system up, it's hard to for anyone to know what limits are programed into system.Comment
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I understand that people have a concern but this is an Aquion battery not a FLA or LFP. According to the manufacturer's claim it should easily go to 40volt. The issue is with the inverter running below 42v.Comment
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A boost from a small, highly efficient LFP battery pack could prevent that from happening, and extend the usable capacity of the AHI pack.
Somehow, I don't think manufacturers will be modifying all their inverters, at least not in the short term.Comment
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At least one of their customers is reported to have whipped up a
hybrid system using the AHI Technology married to Marine Batteries.
However it sounds like a Direct Link set-up which makes it a
primitive hybrid. Nothing like what I propose.
One of my friends just fed Aquion Energy The Slave Bank idea
yesterday. I hear the guy was excited.
Problem: expense.
Became excited about the AHI deal years ago.
Now it's to the point of Look-see time.
Several key points have not been considered yet.
Bill Blake
That will limit the depth of discharge, especially when heavier loads come on.
A boost from a small LFP battery pack would help alleviate the problem and extend the range of the AHI pack. Would also help with efficiency, as AHI isn't as efficient with higher current draws.
The alternative is to run the generator more frequently.Comment
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That would be stupid and ignorant at the same time. To use a battery that cost twice as much as LFP, when LFP can run circles around AHI in every performance metric you can think of. LFP voltage does not sag to any significance until of a discharge rate of 3C or more, where AHI collapses to unusable with just a very small C/8 current. AHI is on the same ground as NiFe of unusable and impractical. You cannot tap the lower 40% or load it heavily not to mention extremely inefficient.MSEE, PEComment
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As a point of note, while other many XW units are rated to go to 40V, the XW6848 that the OP has is rated only to 42V.Comment
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Which means sooner or later the OP will discover what that means, and it will be a fun and educational experience. He will be scratching his head wondering why his batteries still show 30 to 40% capacity, but his system has shut down from low voltage.MSEE, PEComment
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AHI S10's were 1st Generation - S20's today are 2nd Gen.
Where that 540 Ah for 1st Gen. Aquion Energy Modules came from I don't know.
They had several different Modules all claiming 489 Ah using
S10 Battery Stacks for the first generation -
like we have been talking about.
The same size Modules today using S20 Stacks are 612 Ah
down to 30 Volts.
604 Ah down to 40 Volts.
Quite a percentage difference.
There are lots of spreads and number but anyway you cut it
if they are honorable and true this technology is on the move.
Aqueous Hybrid Ion .. Generation 3
is warming up in the bullpen for Later this year according to 'da boys'.
We will see.
old Bill BlakeComment
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That would be stupid and ignorant at the same time. To use a battery that cost twice as much as LFP, when LFP can run circles around AHI in every performance metric you can think of. LFP voltage does not sag to any significance until of a discharge rate of 3C or more, where AHI collapses to unusable with just a very small C/8 current. AHI is on the same ground as NiFe of unusable and impractical. You cannot tap the lower 40% or load it heavily not to mention extremely inefficient.
Other fact is LFP battery prices are increasing. AHI prices are expected to drop.Comment
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Unless the Schneider Engineers changed the firmware when they set the system up, we do know the were on site. XW-6048, Aquion Firmware ver 1.10. ? Of course we don't know that the hardware capability is. Midnight Solar has had a set of Aquion Batteries for over a year tweaking a controller for them.Comment
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More info today from Conext Battery Monitor
DC Source ID House Battery Bank 1
Battery Voltage 47.5 V
Battery Current -35.5 A
Battery Temperature 20.0 ºC
Battery State of Charge 66 %
Battery Midpoint 1 Voltage 48.1 V
Battery Midpoint 2 Voltage 47.6 V
Battery Capacity Remaining 666 Ah
Battery Capacity Removed 334 Ah
Battery BTS Present No
Battery Time To Discharge 00h00m Min
Battery Average Discharge -354 Ah
Battery Average Discharge Percent -35.5 %
Battery Deepest Discharge -496 Ah
Battery Deepest Discharge Percent -49.8 %
Battery Capacity Removed 7893 Ah
Battery Capacity Returned 7593 Ah
Battery Number of Charge Cycles 7
Battery Number of Synchronizations 14
Battery Number of Discharges 0
The OP reports he hasn't used his generator at all, in I believe at least a month of use, in the heart of winter. And the deepest discharge is 50% This blew my mind. I don't know if you could find someone who could say the same in NY. I contacted a real estate salesman just two days ago who happens to be off-grid in the area I am considering. As I expected, he says he uses his generator on average every other day for about 3 hours with his FLA batteries. In summer, he has more power than he knows what to do with - typical story.
I can see how this system meets the needs of the OP very well. A huge advantage is the insolation, even if I have the number off by 50%. If I could go solar and not have to think about using a generator off-grid, I'd be thrilled. Right now, I'm looking at about $28K for an LFP system and gen backup. An AHI system maybe $45K. If I had unlimited space, which I do not, maybe for an additional $10K I could double the size of my array to boost the charge current at non-peak hours. At peak hours, I am already at the recommended peak charge current of the batteries. But I also have total shading at the margins (before 9:30, after 3:00).
I am new to this, but personally AHI is impractical for my application. Doesn't mean it isn't a valid technology. These two scenarios are at the extremes. Sunny Hawaii @ 21 deg N, and cloudy NY @ 42 deg N.
Just some thoughts I have as a read about this system, and drool a bit. I am interested in learning more about the OP's experience.Comment
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I don't know about the OP's exact location, but Honolulu gets 5.5 hours of sun on average in winter. Where I would build a system, only 1.75 hours average in winter.
The OP reports he hasn't used his generator at all, in I believe at least a month of use, in the heart of winter. And the deepest discharge is 50% This blew my mind. I don't know if you could find someone who could say the same in NY. I contacted a real estate salesman just two days ago who happens to be off-grid in the area I am considering. As I expected, he says he uses his generator on average every other day for about 3 hours with his FLA batteries. In summer, he has more power than he knows what to do with - typical story.
I can see how this system meets the needs of the OP very well. A huge advantage is the insolation, even if I have the number off by 50%. If I could go solar and not have to think about using a generator off-grid, I'd be thrilled. Right now, I'm looking at about $28K for an LFP system and gen backup. An AHI system maybe $45K. If I had unlimited space, which I do not, maybe for an additional $10K I could double the size of my array to boost the charge current at non-peak hours. At peak hours, I am already at the recommended peak charge current of the batteries. But I also have total shading at the margins (before 9:30, after 3:00).
I am new to this, but personally AHI is impractical for my application. Doesn't mean it isn't a valid technology. These two scenarios are at the extremes. Sunny Hawaii @ 21 deg N, and cloudy NY @ 42 deg N.
Just some thoughts I have as a read about this system, and drool a bit. I am interested in learning more about the OP's experience.
Seems kind of crazy for Aquion to advertise a very deep DOD battery yet a standard inverter will stop working way before you get to that discharge point.Comment
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