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Old 03-25-2016, 09:41 AM   #1
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Emergency Power ???

I am going back and forth about taking a 4K genny in the back of our pickup on our first big trip with our new 5th wheel.. We just came from an older class A and we did use our genny a couple times... We Do Not dry camp,,, but things happen,,, power outages,, etc... My question is in an emergency,, what kind of battery upkeep can I expect from leaving my pickup hooked up and running to run the 12volt systems in the rv ??? (as in the light cord to the trailer,,, leaving the truck running for short periods if needed) I totally understand AC needs 120 volt.. No biggy.. I'm talking "getting by" as in survival,, furnace, lights, frig... etc... How much power should I expect from the light cord to the trailer ??? This being a 2016 Cougar 5th wheel and a 2015 Diesel Silverado... Thanks.... Monkey

PS and yes I'm aware of engine fumes headed towards the rv... (although you can't smell it on these new ones... I'm talking short term here)

Monkey, pilot of a Great Dane hauler,
2015 Silverado 2500 Duramax/Alison 4x4 CrewCab 2016 Cougar 28SGS
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Old 03-25-2016, 09:56 AM   #2
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Depends on how much your inverter will provide. $150 inverters provide 1000-1200 watts at 120 volts, that's 8-10 amps. Not a lot, but it will surely keep your battery charged. $500 inverters provide like 5000 watts, but you can buy a generator for that and not run your truck to produce 12 v to invert to 120v to run your 12v charger. I got a better idea -- get some good 6v batteries and keep them fully charged. If your emergency lasts more than a couple of days, start your main engine and move. But a gen to run the ac will keep the spousal unit happy.

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Old 03-27-2016, 07:37 PM   #3
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Thanks Tony... I'll find a way to get the 4K genny in the truck.....
Monkey, pilot of a Great Dane hauler,
2015 Silverado 2500 Duramax/Alison 4x4 CrewCab 2016 Cougar 28SGS
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Old 03-27-2016, 09:24 PM   #4
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The truck alternator will supply a small amount of power, but is not designed to charge batteries other than the truck batteries. It is enough to run the trailer jacks, the fridge and a few lights, hardly anything else, and the rpms may need to be raised to do that.
As mentioned, a couple of good 6-volt batteries (Trojan T105s are the industry standard) will last a good while.
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