Sears '67 overlanding trailer

high-and-dry

Active member
Okay on the cpaps the sheet you posted is they are 24 vdc. while that is not a huge issue it means either you need 2 batteries or run them off an inverter. Either way will work, you either buying 2 batteries or 1 battery and an inverter so the money is about the same.Then we get into the losses of an inverter which is 10 to 15 %. so now you would need a bigger battery to deal with the losses.

The problem is the total load for the night per the spec sheet and for 2 units is 60 amp hours. With lead acid you dont want to use more than 50% of the batteries capacity before you recharge. That means you need at least 120 amps of battery before even dealing with losses due to an inverter. I would say buy 2 100 amp hour lead acid batteries, that will cost 2-300 bucks. and you will have 140 lbs of battery to put in your trailer.

I personally dont like lead acid batteries these days, heavy, loose capacity to fast etc etc. I recommend lifepo4 batteries but they are much pricier but they have twice the power for the size and 1/4 the weight. You can get a 60 amp hour lifepo4 for about 330 bucks, they dont care about being discharged 100%, it does not really effect them, and you can charge them 2000-5000 times. Problem being if you went with a 60 ah you would need to charge every day, with no spare capacity. I would say get a 100 to 120 ah lifepo4, that gives you 1.5 to 2 days with no charging and room for losses due to an inverter. Problem is a 100 ah lifepo4 battery is 750 to 1000 bucks. (might find a deal for around 600 )

you might be better off with a 1000 watt inverter generator.
Last thing is the "solar generators" while they look appealing they have draw backs, physical size being one. read the thread below for some of the draw backs. I am saltydawg over at tnttt
 
Last edited:

Unclejarhead

New member
I have 2, wheelchair batteries, that I'm going to hook up to this inverter that should werk out good
 

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