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**JRTJH** · 03-11-2023, 08:48 AM

I think we're "so far into the woods, we can't see the forest for all the trees"...

First, OP, you've got to CONFIRM that your WFCO converter/charger is "lithium compatible". In other words, that it has a LI/LA switch on it AND that the switch is set to LI.

Your generator, if you're trying to charge lithium batteries with the 12 volt output, won't charge the batteries to a voltage greater than the generator output. That is 12VDC, so you'll NEVER charge lithium batteries beyond 12 volts with that generator's DC output. You can use the 120 VAC output to power a separate charger designed for lithium charging and get a much improved charging profile. If you are plugging your trailer shore power cord into the generator's 120 volt outlet, then you're "back to the first part"... Unless your WFCO converter/charger has a LI/LA switch, it can only charge them to approximately 80% of full charge. In short, the ONLY way you can use that generator to fully charge lithium batteries is to plug a separate "LI charger" into the 120VAC and charge them. The 12 volt output will not fully charge a lithium battery.

So, it all "boils down to starting back at square 1" and verifying which model WFCO converter/charger is installed in YOUR trailer and whether it has a lithium profile. If it does, is the switch set to LI ??? If it doesn't, then you can only charge to around 80% with that converter/charger.

The "fix" ???

1. You can use the WFCO to charge to 80% and use the SolarFlex to complete the charge.

2. You can replace the WFCO converter/charger with a different model that does have the capability to charge on a lithium profile (greater DC voltage output)

3. Use a "stand alone charger with a lithium profile" to "top off your batteries" after the "bulk charge capacity of the WFCO has done the best it can which is 80% of full charge"....

In summary, the "most probable cause" for your problem is that your WFCO converter/charger is either not set to LI or does not have a lithium profile so it can't charge your batteries to full capacity.

Here's two locations for the LI/LA switch on WFCO converter/chargers:

03-11-2023, 08:48 AM	#15
JRTJH Site Team Join Date: Mar 2011 Location: Gaylord Posts: 26,998	I think we're "so far into the woods, we can't see the forest for all the trees"... First, OP, you've got to CONFIRM that your WFCO converter/charger is "lithium compatible". In other words, that it has a LI/LA switch on it AND that the switch is set to LI. Your generator, if you're trying to charge lithium batteries with the 12 volt output, won't charge the batteries to a voltage greater than the generator output. That is 12VDC, so you'll NEVER charge lithium batteries beyond 12 volts with that generator's DC output. You can use the 120 VAC output to power a separate charger designed for lithium charging and get a much improved charging profile. If you are plugging your trailer shore power cord into the generator's 120 volt outlet, then you're "back to the first part"... Unless your WFCO converter/charger has a LI/LA switch, it can only charge them to approximately 80% of full charge. In short, the ONLY way you can use that generator to fully charge lithium batteries is to plug a separate "LI charger" into the 120VAC and charge them. The 12 volt output will not fully charge a lithium battery. So, it all "boils down to starting back at square 1" and verifying which model WFCO converter/charger is installed in YOUR trailer and whether it has a lithium profile. If it does, is the switch set to LI ??? If it doesn't, then you can only charge to around 80% with that converter/charger. The "fix" ??? 1. You can use the WFCO to charge to 80% and use the SolarFlex to complete the charge. 2. You can replace the WFCO converter/charger with a different model that does have the capability to charge on a lithium profile (greater DC voltage output) 3. Use a "stand alone charger with a lithium profile" to "top off your batteries" after the "bulk charge capacity of the WFCO has done the best it can which is 80% of full charge".... In summary, the "most probable cause" for your problem is that your WFCO converter/charger is either not set to LI or does not have a lithium profile so it can't charge your batteries to full capacity. Here's two locations for the LI/LA switch on WFCO converter/chargers: Attached Thumbnails __________________ John 2015 F250 6.7l 4x4 2014 Cougar X Lite 27RKS