What do you plan on running?
How strong are you - can you lift out a 135 pound generator and get it back into the pickup at the end of the trip, or will you drive off - figuring you will save well over $600 on chiropractic visits if you do not put the generator back in the pickup?
Many buy 2 generators - Honda inverter type that are 47 pounds and rated at 1,600 watts, but are called Honda 2000 due to it's 15 minute rating of 2,000 watts. You can link two together, and get 4,000 watts to run a rooftop A/C in two easy to move around packages. And they are pretty quiet. Less noise than a typical diesel engine at idle.
The Honda 3000 watt generator is a little larger, much more weight, and still barely enough power to restart a air conditioner on a hot day. Yes it takes more power to run the A/C on a hot day.
If you just want to recharge the battery, then a 1,000 watt Honda is a little less money, slightly lighter, and will run just the charger, tv set, and perhaps charge some laptops and other small devices.
Then there is a 'inverter' - that takes in 12 volts from the battery, and puts out say 300 watts max square wave power (for only about $50) or pure sine wave power (for about $200 - $500).
Due to battery size, running a air conditioner is not practical. It 'could' be done, but would take 800+ watts of solar panels, and a special 2,000+ watt sine wave inverter to run the high torque compressor motor.
Recharging the batteries with solar is very practical. Your RV will consume about 35 AH of power each day, or about what one 120 watt solar panel will put out in one day. You can get the 140 watt for about $229 at this place.
SunElec.com Then a 20 amp PWM controller, some grey direct burial wire from home depot, and you will have a $750 system that will keep the batteries full every day. (pair of 140 watt panels to keep ahead of use each day).
Have fun camping!
Fred.
PS: I think if my inverter, 400 watt solar system and extra batteries will save me well over $10 each night for 300 days the first 8 years I had it, paying for the system, and again 3 more times once I started full time camping from 2005 - 2013. And I get to camp next to a lake, river, on a mountain vista, ect, not a crowded campground! Priceless!
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com