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Old 05-29-2023, 11:00 AM   #1
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2019 23' Flying Cloud
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Changing from AGM to Lithium batteries

I have a 2023 flying cloud that came with AGM batteries and I considering changing to lithium. The charger auto detects battery type. I need to change switch settings on solar control and I buying self heating batteryís so they can go outside. Anyone see a problem with this plan? Do I need to change anything with charge lead from truck?

Regards,

Larry
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Old 05-29-2023, 08:15 PM   #2
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Well your stock converter with auto-detect is questionable whether or not it will work properly, many have had issues getting it to work right and keeping it working right.

For the charge line from the truck you would be better off if you either disconnect it or add a DC to DC charger, some do both with adding separate wires for the DC to DC charger.
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Old 05-30-2023, 06:47 AM   #3
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+1 about the WFCO converter. In theory you won’t need to buy a new converter, but I would recommend that you include a Progressive Dynamics replacement in your budget. The WFCO units don’t like to go into and stay in lithium mode. WFCO Will upgrade the firmware for you if you jump through lots of hoops, but it likely won’t permanently fix the issue with the converter.
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Old 05-30-2023, 02:24 PM   #4
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Quote:
Originally Posted by Wazbro View Post
For the charge line from the truck you would be better off if you either disconnect it or add a DC to DC charger, some do both with adding separate wires for the DC to DC charger.
What he said.
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Old 05-30-2023, 06:26 PM   #5
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Originally Posted by jnm30327 View Post
What he said.


I will look into progressive dynamics. Look as the dc to dc chargers, Iím thinking 20 amps is sufficient and I donít know if the wiring on the truck will supply much more than that.
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Old 06-02-2023, 08:13 AM   #6
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Quote:
Originally Posted by Larry1492 View Post
I have a 2023 flying cloud that came with AGM batteries and I considering changing to lithium. The charger auto detects battery type. I need to change switch settings on solar control and I buying self heating batteryís so they can go outside. Anyone see a problem with this plan? Do I need to change anything with charge lead from truck?

Regards,

Larry


200ah lithium batteries installed, they fit in box. Dc to dc charger installed, solar configured and charger converter indicating it sees lithium. Batteries show 100% after charging overnight. On to testing. As soon as the refrigerator cools down Iím going to pull the plug and see how long I 200ah last me.
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Old 06-05-2023, 11:46 AM   #7
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Charged batteries to 100% Friday and shut down charger converter. After two overcast days the batteries were down to 50% this morning. The sun is out and the solar charging has them back to 100%. It looks like I can go four days without any charge at all running Norcold electric refrigerator. My expectations have been exceeded. Iím going to be very happy with this setup.
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Old 06-05-2023, 12:39 PM   #8
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That’s great, congratulations. To help us understand this better, which model fridge and what were the ambient temperatures day and night?
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Old 06-05-2023, 12:43 PM   #9
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You may want to take a look at this thread I started this morning on in the Basecamp forum:
https://www.airforums.com/forums/f40...tc-244096.html
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Old 06-05-2023, 01:05 PM   #10
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Thatís great, congratulations. To help us understand this better, which model fridge and what were the ambient temperatures day and night?


The fridge is the Norcold N8dc and the daytime temps in the eightyís and nights in the sixties.
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Old 06-05-2023, 01:51 PM   #11
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From the Norcold website, here are the power rates for that fridge:

Listed Amp Draw: 12V/DC :
Standard Mode Night mode
7.9 5.7

So that would be almost 200Ah per day running full time in standard mode, but they cycle on and off frequently. Your use of 100Ah over two days indicates a 25-35% duty cycle at those ambient temperatures, which is quite efficient. You will use more on warmer days, and less on cooler days.

Good experience based data — thanks for providing it.
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Old 06-05-2023, 01:59 PM   #12
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Quote:
Originally Posted by jnm30327 View Post
What he said.
What they said.
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Old 06-05-2023, 02:09 PM   #13
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There are numerous threads on installing lithium batteries, but sounds like you moved quickly and got it done. I put four inside under a twin bed and upgraded the solar controller. and replaced the sketchy charger with a Victron. (My vehicle doesn't support the DC/DC charger (fused too low), so the charging wire is disconnected.)

I strongly recommend the Victron shunt. You won't have to guess then about how fully charged the batteries are. I don't know how your FC is configured but you should be able to squeeze it in by the DC junction box.
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Old 06-05-2023, 05:55 PM   #14
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There are numerous threads on installing lithium batteries, but sounds like you moved quickly and got it done. I put four inside under a twin bed and upgraded the solar controller. and replaced the sketchy charger with a Victron. (My vehicle doesn't support the DC/DC charger (fused too low), so the charging wire is disconnected.)



I strongly recommend the Victron shunt. You won't have to guess then about how fully charged the batteries are. I don't know how your FC is configured but you should be able to squeeze it in by the DC junction box.


I did not want to give up the storage under the bed( yes we always bring to much stuff) so I used the self heating batteryís and located them in the battery box. My tow vehicle supports 30 amps to the trailer so dc to dc charging works. I also like the feature in the Victron that it shuts down when the tow vehicle is not running. The batteries came with a charge level indicator which works for now but down the road I will most likely add the Victron shunt.
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Old 06-05-2023, 07:59 PM   #15
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Larry, which model trailer do you have?
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Old 06-06-2023, 05:51 AM   #16
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Larry, which model trailer do you have?


Flying Cloud 25fbq
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Old 06-06-2023, 06:44 AM   #17
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Who's battery did you choose, why, model number?
Do you have an Inverter in line?
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Old 06-06-2023, 07:39 AM   #18
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Who's battery did you choose, why, model number?

Do you have an Inverter in line?


Click image for larger version

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Epoch S12100B was he most battery for the dollar and the highest capacity that would fit in box, I did rotate them 90 degrees from original Agmís. Also needed batteryís with heating function since I live up east. I would have spent the extra money for the ones with Bluetooth monitoring but they were slightly larger and would not fit and at some point Iím going to add the Victron Bluetooth shunt so the function would be redundant.
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Old 06-06-2023, 07:40 AM   #19
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Attachment 432839

Epoch S12100B was he most battery for the dollar and the highest capacity that would fit in box, I did rotate them 90 degrees from original Agmís. Also needed batteryís with heating function since I live up east. I would have spent the extra money for the ones with Bluetooth monitoring but they were slightly larger and would not fit and at some point Iím going to add the Victron Bluetooth shunt so the function would be redundant.


Yes I do have inverter.
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Old 06-06-2023, 03:50 PM   #20
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Larry, looked at your choice of battery - looks like a great unit from specs and reviews BUT the largest then make is the 100Ah unit you purchased.

I'm figuring I will need 2 x 200Ah batteries but will try to start out with just one 200 Ah. Wish they made a 200!

Thanks for your info.
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