LIFEPO4 Battery discussion thread

cavedog said:
It's the lowest priced lifepo4 battery in SA as far as I can tell.

Are they any good at all? It's hard to find details about them except the reviews with so many people saying they are good but do they offer the capacity as advertised and how long do they last.

4 of them in series that is R8764 for a 51.2v pack. Seems well priced for new* cells.
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Its gone. Sold out, I should have got 2 to add to my 2 scott batteries then I could upgrade to 48V.

Will wait for the next round. I guess you can call it a special lol.
 
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Done and dusted. Had to wipe first with terminal cleaner and then use terminal protector.

I did mess up my wall but it’s all inside the enclosure so didn’t really care. Shouldn’t have any corrosion issues anymore considering it’s also tin plated busbars. This is just extra.
 
What do you guys think about half way connection instead of using a busbar?

1780160579726.png
 
So, I had never actually connected the cable for comms between the inverter side of the Omni Volt and the battery. SOC always agreed between the 2 so didn't think it was necessary.

Today as I was outside working on the battery enclosure, I heard an alarm go off. I went in the house, and it was quiet. I figured I was hearing things and then heard it again and ran as quickly as I could to see the Omnivolt give an error 64 fault.

It came and went. The guys at Power forum did get that error so I wasn't too surprised. The issue now to fix was being able to set the charging voltages correctly (I had procrastinated and it finally bit me).

Its set to 56.8V now and float at 55.6V. Absorption time is 45 minutes. To change the settings had to configure for SLA and change the BMS protocol to WOW (SRNE standard). All the voltages etc where locked before I changed it to that.

Error 64 was sorted but now ran into another issue. The SOC on the BMS said 95%, the inverter said 78%. I spent the last 2 hours trying to figure out how to get them to agree. At one point I killed the power to the one side of the house by mistake as the inverter at one point thought the SOC was 2% even though the BMS was saying 86.

Connected the RS485 cable between the inverter and battery side. Was a lot of guess work as the Powerforum guys have the larger all in one inverter which doesnt have the same ports and setting as my 5kW. Was getting Error 58 quite a lot. I dug up the 5kW all in one manual for the SRNE which gave some clues.

Changed from SLA to BMS on setting 32 and then BMS protocol to PAC (Pace BMS) and heard a beep from the inverter. Now the BMS, Inverter and after a few minutes the SmartEss app all show the same SOC. Seems my problems are solved.
 
denmendez65 said:
So, I had never actually connected the cable for comms between the inverter side of the Omni Volt and the battery. SOC always agreed between the 2 so didn't think it was necessary.

Today as I was outside working on the battery enclosure, I heard an alarm go off. I went in the house, and it was quiet. I figured I was hearing things and then heard it again and ran as quickly as I could to see the Omnivolt give an error 64 fault.

It came and went. The guys at Power forum did get that error so I wasn't too surprised. The issue now to fix was being able to set the charging voltages correctly (I had procrastinated and it finally bit me).

Its set to 56.8V now and float at 55.6V. Absorption time is 45 minutes. To change the settings had to configure for SLA and change the BMS protocol to WOW (SRNE standard). All the voltages etc where locked before I changed it to that.

Error 64 was sorted but now ran into another issue. The SOC on the BMS said 95%, the inverter said 78%. I spent the last 2 hours trying to figure out how to get them to agree. At one point I killed the power to the one side of the house by mistake as the inverter at one point thought the SOC was 2% even though the BMS was saying 86.

Connected the RS485 cable between the inverter and battery side. Was a lot of guess work as the Powerforum guys have the larger all in one inverter which doesnt have the same ports and setting as my 5kW. Was getting Error 58 quite a lot. I dug up the 5kW all in one manual for the SRNE which gave some clues.

Changed from SLA to BMS on setting 32 and then BMS protocol to PAC (Pace BMS) and heard a beep from the inverter. Now the BMS, Inverter and after a few minutes the SmartEss app all show the same SOC. Seems my problems are solved.
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Why would inverter think its 2% on SLA? SLA only cares about voltages.

What was it set to before with the error 64 fault?
 
wingnut771 said:
Why would inverter think its 2% on SLA? SLA only cares about voltages.
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It was that error 58. I was connecting between the Inverter RS485 and the RS485 port for adding other batteries, not the internal batteries RS485 port.

When on SLA and disconnecting the cable the inverter thought it was 75 or so % whereas BMS reported 86 at that time. Not ideal scenario I would say.
 
denmendez65 said:
It was that error 58. I was connecting between the Inverter RS485 and the RS485 port for adding other batteries, not the internal batteries RS485 port.

When on SLA and disconnecting the cable the inverter thought it was 75 or so % whereas BMS reported 86 at that time. Not ideal scenario I would say.
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I don't think that matters, only voltage afaik.
SLA (sealed lead acid) doesn't have comm cables.
 
wingnut771 said:
I don't think that matters, only voltage afaik.
SLA (sealed lead acid) doesn't have comm cables.
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Doesn't one give up capacity leaving it in SLA? It will cut off sooner than necessary. I would rather drain to 10% or as much as possible rather than giving up extra.
 
denmendez65 said:
Doesn't one give up capacity leaving it in SLA? It will cut off sooner than necessary. I would rather drain to 10% or as much as possible rather than giving up extra.
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Not really, much of a muchness. Just factor in voltage drop under load for low cut off so make it 45V. Some BMS' wont let you go below a certain voltage though, eg sunsynk battery doesn't go below 49V from my cape town experience.

Who's to say 10% is 10% anyway? Next time it says its 10%, have a look at the voltage and compare to this:
1780172165527.png
 
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