Originally Posted by EvnEm
Just the basics really, except I want to run a CPAP at night too. That, of course means I need to install an inverter(which one?) since my WFCO converter doesn't do that. Will the WFCO charge 2 golf cart batts ok when connected to shore? I just bought the Renogy 100w solar system too. Will that charge those batts ok? Or is all of this just overkill for the couple few times I camp without shore power each year? I appreciate any advice or opinions before I start laying out more cash! (though the tinkerer inside me says to go ahead and do it anyway
I don't use a CPAP so I'll just say run avoid the inverter, run the CPAP off 12V, and turn the moisturizer off.
The WFCO will charge 2 6 volt batteries just a well as it will a 12V battery. Are there better ways to keep your battery charged? Perhaps, depends on how well your WFCO is working.
Many, including myself, have had problems with WFCOs. But many more have not - and they are installed as standard equipment in many, many RVs. The biggest reported problem is that the WFCO converters will not change charging modes when they should. Mine would not drop down into trickle charge mode even when the 44 hour timer had completed and my batteries were fully charged. Other WFCOs would not go into boost mode, which is faster charging at a higher voltage when your battery is low. The only way to know is to check battery voltages with a voltmeter, and compare against the manuals.
A PD converter (Progressive Dynamics makes highly regarded drop-in replacements for WFCO converters.) will stay in boost mode a while longer than a WFCO, which will speed re-charging when plugged into shore power. PD converters also do equalization once a day when in trickle charge mode, WFCO converters do not. Frankly, I don't attach a lot of value to equalization. Other than that, the specs and charge voltages are the same between WFCO and PD.
The solar is certainly not going to hurt you. A 100W panel may not fully recharge your batteries each day, but it will at replenish a good part of what your CPAP and/or heater fan use.
just my thoughts and experiences
2014 Rockwood A122 A-frame (with 2 Costco Interstate 6V 232AH golf cart batteries - last at least 4 nights with heater at 5 hours/night)
2008 Hyundai Entourage minivan