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Old 05-23-2022, 05:29 PM   #1
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400 AMP Hour Battery Not Holding a Charge

I had Rangeland RV install a solar package on my new 2022 FR3 Class A Motorhome but it doesn’t seem to work and I took it back to them already twice for repair. They installed 4 solar panels at 300 Watt each plus kept the original factory solar panel at 100 Watt on the roof for a total of 1,300 W. They also installed 4 Lithium batteries for a total of 400 Amp hours. I charged the batteries for 15 hours one day while being plugged in. The only appliance I ran was our fridge and within 6 hours the low voltage shut down initiated. I then tried to charge the batteries via generator for 5 hours. The Xantrex control App shows the bulk charge stage usually for 30 minutes, then the absorption charge stage for 15 minutes and then goes to the floating charge stage. The low voltage recover is set to 14.5V. I only plugged in 2 phones that night (fridge was on propane and TVs are off and A/C is off) and within 10 hours the low voltages shut down initiated which is set to 12.1 V. The batteries should be lasting a lot longer than that and Rangeland agrees but cannot resolve the problem. The Invertor is a Xantrex Freedom X and we were told we do not need a converter because apparently it has one integrated. Any one have ideas why it’s not working
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Old 05-23-2022, 05:36 PM   #2
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Have they tested those batteries to make certain they are still good?

There's another thread on this subject here, but it might not help.
https://www.forestriverforums.com/fo...ng-226264.html
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Old 05-23-2022, 06:23 PM   #3
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Did they upgrade your BIM to a LiFePO4 Battery Isolation Manager (BIM)?



Below is a Lead-Acid vs LiFePO4 charging voltages. The yellow is the OEM BIM voltages. Your battery loss is the LiFePO4 batteries charging your starter battery.



Also did you get a Victron BMV-712 installed to monitor your battery bank & Engine starter battery?



P.S. I have a SDC-107A Battery Control Center (BIM). FR3 switched over to a Battery Isolation Manager 225 AMPS in newer models.

What Solar charge controllers do you have? 1300w will output about 100 amps.
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Old 05-23-2022, 11:38 PM   #4
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Originally Posted by Reverse_snowbird View Post
Have they tested those batteries to make certain they are still good?

There's another thread on this subject here, but it might not help.
https://www.forestriverforums.com/fo...ng-226264.html
Thanks for sending that link but it doesn’t answer our question. Our Invertor power is on but it goes to low voltage. I read on the Xantrex website that the minimum battery bank size for a 1320W Solar size is 440AH. We are at 1300W with 400AH so maybe that is causing overheating and it to go into idle mode. Not sure if removing a solar panel would help.

We have not checked the batteries but I would be surprised if all 4 batteries are not working properly. Even a single 100ah battery should provide us with longer life based on some of the online calculations I was reading.
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Old 05-23-2022, 11:47 PM   #5
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Originally Posted by rk06382 View Post
Did they upgrade your BIM to a LiFePO4 Battery Isolation Manager (BIM)?



Below is a Lead-Acid vs LiFePO4 charging voltages. The yellow is the OEM BIM voltages. Your battery loss is the LiFePO4 batteries charging your starter battery.



Also did you get a Victron BMV-712 installed to monitor your battery bank & Engine starter battery?



P.S. I have a SDC-107A Battery Control Center (BIM). FR3 switched over to a Battery Isolation Manager 225 AMPS in newer models.

What Solar charge controllers do you have? 1300w will output about 100 amps.
I do not know what solar charger controller i have so I will ask them tomorrow. I am also not familiar with BIM so will inquire about that.

I attached some screenshots of my settings for the 2 Apps they told me to download. I will have to ask more questions and do more research about what was all installed. I ended up buying it because of what I was told it could do but it doesn’t do much at all. We’re pretty much using our propane and generator at the moment only and have our invertor off.
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Old 05-24-2022, 05:16 AM   #6
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Float voltage. Is that 1.2v. Should be around 13.4
Lifepo4 do not need equalization charge.
How did they wire the existing pannel, is the voltage the same?
Odd to have 5 pannel, do you know how they are wired? Series, parallel?
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Old 05-24-2022, 06:28 AM   #7
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Originally Posted by alexgramatzki View Post
I do not know what solar charger controller i have so I will ask them tomorrow. I am also not familiar with BIM so will inquire about that.

I attached some screenshots of my settings for the 2 Apps they told me to download. I will have to ask more questions and do more research about what was all installed. I ended up buying it because of what I was told it could do but it doesn’t do much at all. We’re pretty much using our propane and generator at the moment only and have our invertor off.




Your float voltage needs to higher than 1.2v. My float is set to 13.25v.

Equalizing charge is not needed for LiFePO4 batteries.
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Old 05-24-2022, 08:13 AM   #8
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Originally Posted by rk06382 View Post




Your float voltage needs to higher than 1.2v. My float is set to 13.25v.

Equalizing charge is not needed for LiFePO4 batteries.
It seems in my settings I am not able to adjust the float floatable as it is greyed out. I will also bring this up with my tech. Thank you for pointing thag out.
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Old 05-24-2022, 11:07 AM   #9
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It seems in my settings I am not able to adjust the float floatable as it is greyed out. I will also bring this up with my tech. Thank you for pointing thag out.
You should have two chargers.
  1. MPPT Solar Charge Controller. I have a Victron SmartSolar MPPT 100/50 charge controller. Maximum charge rate is 50 amps.
  2. Lithium Battery Charger for charging from Shore or Generator.

I have a Samlex EVO-3012 Inverter/Charger that can recharge my batteries at 130 amps. I have it set to bulk charge 14.6v for 120 minutes, float at 13.25v. Maximum charge rate is 130 amps.

You have a Freedom XC PRO 3000 inverter/charger.. Maximum charge rate is 150 amps.

Make sure your OEM Converter/charger is disabled or removed. I also disabled my electric hot water heater. You can still use the propane side of the hot water heater.

I am not an expert on your Xantrex system. I only know what MY Samlex System will do.

I have to work a few bugs out of my system & you will too. Good Luck.
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Old 05-24-2022, 03:30 PM   #10
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Something is obviously wrong. The float voltage setting is crazy. It needs to be about 13.8. I'm not familiar with the display screen that you put up but if that's the display screen from your charging system, The first thing I would do is fix the float. My system was set for my 600 amps of batteries and due to a bad circuit breaker I only had 400 amps online during this last trip. It was messing my head up because the Victron monitoring software said I was only 73% charged. But your problem seems deeper than that You are getting a low voltage shut off. I've never gotten that low on my batteries but memory service me I've had mine set at about 10.7 volts for shut off. As soon as voltage above about 11 and 1/2 volts hits the battery it should come out of shut off mode automatically. You didn't mention what batteries you have. I built mine from parts I got from China but I got top quality parts and they seem to be working fine. Except a circuit breaker that went bad. I suspected fried because I have 200 amp capacity out of each of three batteries and I only had 100 amp circuit breaker on each battery. I upgraded those to 200. Put all three batteries back in the system and in minutes they will registering 100% state of charge.

You didn't mention what refrigerator you're running but if you really have 1300 watts of solar when the sky is clear and sunny at about solar noon, You should be getting between 5 and 6 amps per hundred watts.

So a minimum of 65 amps and that will do a pretty good job at charging batteries if the charge controller is set up correctly and if it is in fact wired to the batteries. Obviously check and make sure your refrigerator isn't pulling in it ridiculous load on your inverter. My rule of thumb is for every amp of 120 volt draw my inverter is pulling 11 amps from the battery.
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Old 05-25-2022, 05:19 PM   #11
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Something is obviously wrong. The float voltage setting is crazy. It needs to be about 13.8. I'm not familiar with the display screen that you put up but if that's the display screen from your charging system, The first thing I would do is fix the float. My system was set for my 600 amps of batteries and due to a bad circuit breaker I only had 400 amps online during this last trip. It was messing my head up because the Victron monitoring software said I was only 73% charged. But your problem seems deeper than that You are getting a low voltage shut off. I've never gotten that low on my batteries but memory service me I've had mine set at about 10.7 volts for shut off. As soon as voltage above about 11 and 1/2 volts hits the battery it should come out of shut off mode automatically. You didn't mention what batteries you have. I built mine from parts I got from China but I got top quality parts and they seem to be working fine. Except a circuit breaker that went bad. I suspected fried because I have 200 amp capacity out of each of three batteries and I only had 100 amp circuit breaker on each battery. I upgraded those to 200. Put all three batteries back in the system and in minutes they will registering 100% state of charge.

You didn't mention what refrigerator you're running but if you really have 1300 watts of solar when the sky is clear and sunny at about solar noon, You should be getting between 5 and 6 amps per hundred watts.

So a minimum of 65 amps and that will do a pretty good job at charging batteries if the charge controller is set up correctly and if it is in fact wired to the batteries. Obviously check and make sure your refrigerator isn't pulling in it ridiculous load on your inverter. My rule of thumb is for every amp of 120 volt draw my inverter is pulling 11 amps from the battery.
You were right about the low voltage cut off. We reduced it to 10.8V and now thr batteries work fine.

I however still think I have issues with the solar as my controller is showing me all these error codes and keeps going into IDLE or Float Mode even though thr battery is not fully charged. Any idea what parameter settings I should enter? I took a screenshot of the options.
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Old 05-25-2022, 09:02 PM   #12
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You were right about the low voltage cut off. We reduced it to 10.8V and now thr batteries work fine.

I however still think I have issues with the solar as my controller is showing me all these error codes and keeps going into IDLE or Float Mode even though thr battery is not fully charged. Any idea what parameter settings I should enter? I took a screenshot of the options.
Boost charge voltage should be the same the same as your Inverter/Charger: 14.6v.

I would also set the Float charge voltage to 13.25v. This will help any electrical load to come from solar & not from your batteries.
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