Wow, what a fantastic group. Thank you for all your comments on the refer/propane issue. They have been very helpful. If I solve the problem of how to stop the flame from blowing out (without blowing myself up) I will post the results. ~~~~~~~~~~ Above is the message from Glenn. Now I want to chime in and praise this fantastic group. The exchange of information is awesome!! I like the way Glenn explained the relationship between the car and trailer batteries. If I had known these facts, I could have saved the $300. expense for a new deep-cycle battery (and labor). The salesman said I'd be able to run my refrigerator for four days, dry camping. Well, as many of you know (from my blog) that didn't happen. Furthermore, the refrigerator (that only runs on 12 volt) pulled power from the car battery and I had several mornings with a dead car battery!! N ow, every night, I disconnect the electric cord from the car. Usually the refrigerator runs all night. Lorraine (temporarily in Campbellsville, KY) http://TabTeardropTravels.blogspot.com
For us, the propane seems to provide the best refrigeration and seems better than AC or DC. At a drain of 11 amps per hour on DC power, an 80amp battery will only power the refer for about 6 hours when not connected to the car(which assumes the battery is full to start with and that you don't drop below 11.5 volts (20% left)...which apparently screws up the refer). So for us, not connected to the car, its propane or AC.
I haven't measured the constant output from the car alternator, but I suspect it isn't much more than 12 or 13 amps per hour (as I understand a car alternator is more suited to rapid recharge of typical car batteries and not deep cycle batteries). Thus the problem of very little recharge while driving if you have the DC refer on (12-11=1 amp per hour...which would be 80 hours of driving to charge a fully discharged battery while the refer is on). Probably my math is off alittle, but experience shows that it is best to leave the DC off for part of your drive if you need a charge on your battery. Now how that works in 105F weather in Arizona, I don't know. We resorted to a cooler and ice.
Cheers,
Glenn (Vancouver, BC)
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