lifepo4 battery
- Thread starter BillT
- Start date
8 * 6 * 385 = 18480Wh, 9240Wh usable (50%)
8 * 3.2 * 280 = 7168Wh, 5734Wh usable (80%)
16 280Ah LFP cells arranged in a 2P8S configuration, or 2 separate 8S 24V batteries would give you 11469Wh of usable storage. Would run you about $2000.
8 * 3.2 * 280 = 7168Wh, 5734Wh usable (80%)
16 280Ah LFP cells arranged in a 2P8S configuration, or 2 separate 8S 24V batteries would give you 11469Wh of usable storage. Would run you about $2000.
You would simply have two batteries comprised of 8 cells each instead of a single battery in a 2P8S (16 cells) configuration. Each battery would need its own BMS.
This all presumes DIY. You could buy 10X 24V Battleborns for about $9500 for the same capacity instead of DIY for $2000.
Okay, so you've mentioned they have 385Ah in your first post. 280Ah above.
I find no L-16 battery. I find a L16H as well as other variations, and it's 435Ah flooded.
Are you reading off the batteries, or are you going off memory? I'm trying to help you, so I ask that you help me help you.
Are they AGM or flooded?
I find no L-16 battery. I find a L16H as well as other variations, and it's 435Ah flooded.
Are you reading off the batteries, or are you going off memory? I'm trying to help you, so I ask that you help me help you.
Are they AGM or flooded?
Ampster
Renewable Energy Hobbyist
I think the Flex 80 is programable so you would charge to 27 volts and set your inverter to Low Battery Cut Off to something like 25 volts to be conservative to charge LFP batteries. Whether you would float depends on your use case. Is this off grid?
I find L16 XC2 but no others. Since I can't find a datasheet, I'd go with this:
That's something of a non-standard charge cycle, so I'll omit the "finish charge" as it's essentially a tiny equalization cycle.
2.4V/cell = 28.8V bulk/absorption
Charge at 28.8V until voltage drops to 0.03*380 = 11.4A
Float at 26.04V
Equalization at 30.6V
Check all cells for proper fluid level at least once per month when fully charged and check specific gravity at least once every 90 days.
That's something of a non-standard charge cycle, so I'll omit the "finish charge" as it's essentially a tiny equalization cycle.
2.4V/cell = 28.8V bulk/absorption
Charge at 28.8V until voltage drops to 0.03*380 = 11.4A
Float at 26.04V
Equalization at 30.6V
Check all cells for proper fluid level at least once per month when fully charged and check specific gravity at least once every 90 days.
He's still on FLA
Ampster
Renewable Energy Hobbyist
I know. I was answering his question about LFP in post #6. It is early to be thinking of that unless he was seeing if his Flex max would handle it.
I think I'm confusing you guys.
The L16 batteries I have been using for 6 years. I don't need the charging specs on them. They are FLA batteries.
I am trying to find out how to charge the 2 separate 8S 24V lifepo4 batteries that I want to switch to.
The L16 batteries I have been using for 6 years. I don't need the charging specs on them. They are FLA batteries.
I am trying to find out how to charge the 2 separate 8S 24V lifepo4 batteries that I want to switch to.
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Ampster
Renewable Energy Hobbyist
I gave you the specs for that. You could either put the two 8 cell groups in parallel or buddy pair the 3 volt cells into one 24 volt battery. It is a matter of personal preference if you do one vs the other. It doesn't chang the charging settings.
