lifepo4 and maxxfan
Hello, I am new here. I didn't see a new member introduction so I will do that quickly before posting my question. Matt from Michigan. I have a 1989 pop top 8' skamper on a 2004 2500 duramax. So...
Forum Discussion
mdkelley wrote:
ordering a 20A/300W buck converter step-down unit. Hoping that unit is large enough I can just wire it in before my distribution fuse box and filter both the battery and converter for the entire camper (maxxfan, propane furnace, 3 LED lights, USB power outlet, and 12v/propane refrigerator). If not, I can use it for just the fan/light circuit and buy additional units for other circuits if needed, it was only $15.
on hold for well over an hour this morning with airxcel to see if they will warranty this (less than one year since purchase, just installed it a month or so ago). Had to drop off and opted for the callback feature on their phone system. I am wondering if they either have a very limited staff, or just so many issues their customer support department cannot keep up...
Definitely report back on this. I have feeling that it won't work. Typically a buck converter (particularly a cheap one) need the input voltage to be 2-3V above the output voltage. So if you are planning on regulating at typical lead acid battery voltages (12 - 13V) it may work when the converter is on (14.6v down to 12V), but once the converter is off and the battery drops to 13.2V, the converter will drop out.
I think the real solution is to return the existing fan, and get one that works at actual RV voltages. This is not a converter/lithium problem but is a fan problem. Most lead acid batteries need to be charged up to 14.7V every now and then as well, so the fan is apt to burn out in that scenario as well. While you are at it, it may be good to return the converter as well and get one that actually works with lithium.
