Hi our Trace inverter has temp sensors which were attached to the old lead acid batteries. I do not know if they are needed with the new batteries, nor how to turn them off. Also there is a selection in the inverter's charging section between lead acid and nicad, and no apparent off switch. Does anyone know about these things? The paper manual has been well examined and I see nothing about a bypass or auto sensing.
Temp sensor and NiCad vs Lead setting for LifPo4 with Trace SW4024
- Thread starter kanelr
- Start date
sunshine_eggo
Happy Breffast!
SW4024 temp sensor is for temperature compensation on lead acid batteries when charging with the inverter's AC charger. It will charge them to higher voltages in lower temperature and lower voltages in higher temperature.
Removing the sensor from the Trace will disable temperature compensation.
The inverter supposedly has a temp comp profile for NiCd:
Page 48:
Are you powering the Trace with NiCd?
Which ones?
Why?
Removing the sensor from the Trace will disable temperature compensation.
The inverter supposedly has a temp comp profile for NiCd:
Page 48:
Are you powering the Trace with NiCd?
Which ones?
Why?
Powering with LPo4.
Xantrex tech two months ago said I can use the Trace's setting easily for those, but we didn't discuss the temp or nicad settings. . i know why it's needed for lead acid, read somewhere it's a no-no for my new batts....
Just got off phone with xantrex. Talked to them in January to make sure could use for Lifpo4. Just got off phone with them after reading your questions. Pretty much same thing that sunshineeggo said.
For the SW4024 use the lead acid and not nicad setting in section 10
Unplugging the phone jack type wire to the temperature sensor lead disables the temp feature.
For the SW4024 use the lead acid and not nicad setting in section 10
Unplugging the phone jack type wire to the temperature sensor lead disables the temp feature.
cliffgrimes
Off Grid living!
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- Feb 24, 2022
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Did you have to make any other adjustments for the LiFePO4 batteries?
I have a SW4048 inverter and just switched from FLAs to the LiFePO4 batteries.
I've had one instance where the inverter reset - went into the off mode and I had to manually swith it back on.
I did not change any of the cut off voltages.
These are the settings I am using with LiFePO4 from Power Queen- its a 2x12v = 24 volt setup, hence the x2 settings on the chart. the SW4024 DOES NOT remember the settings when you disconnect it from the batteries, or when you trip a fuse/breaker. So I keep these handy. ALSO the trace tech told me that the main fuse can be big 200 or 250 amps, If your wiring is also big enough, of course. this allows a lot of room so that the breaker doesn't trip when you switch between modes. I was using 50A now am switching to 200. The trace tech also confirmed that somehow the battery temp sensor know when it's little phone jack disconnected and does its own setting change or maybe you'd call it a bypass.
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cliffgrimes
Off Grid living!
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Thanks for this information!
I'll check it over for my inverter and see if it helps my issue.
When the inverter went off it displayed "HBCO resets at: 6V" which is the value for a 48V system:
This is the battery voltage at which the inverter turns off. The inverter will automatically restart once the battery voltage has dropped 1.5 VDC below the HBCO setting for 12 VDC systems, 3 VDC for 24 VDC systems, and 6 VDC for 48 VDC systems. This setting is not temperature compensated.
so I am guessing somehow it hit the High Battery Cut Off voltage.
I do not have the BTS connected and the voltages display the same.
Who did you contact at trace? Could you pass along the number you called for support?
Attached is the manual cover with phone numbers i just asked for support for older SW4024's and they put someone on. Also there is a man that can be reached through "sun pumps" named Roy. he used to work at trace, and is independent. he is semi retired and he may not call you back for a week but he is nice informative, but he really seems to know his stuff. Do you have the full printed manual for the inverter?
cliffgrimes
Off Grid living!
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Thanks! Yes, I have the manual but did not think to try the numbers.
I'll give them a call and see where I get.
