I have been looking into this generator for some time, and am getting ready to buy one. It runs at 850 watts. And I understand the flexibility of having a duel fuel generator. One might have a problem getting either propane or gasoline. But the dual fuel options are all at least 2000 watts surge and they run max 35 hours on a 20 lb tank of propane. The Alp can go 60 hours. They are also a bit noisier. The Alp can run in parallel, so you can boost this to 2000 watts surge and 1700 continuous with two of them. I have also seen that they are soon going to launch a 2000 watt version of this. I am thinking of getting a cheap (under $200) gas generator to carry as well, just in case I need to run a heater and I have no propane. But the Alp has a "built in" legitimate "staged" battery charger; DC to DC. And you can get a cable with alligator clips to charge directly your batteries. I would not hook this up to the rig and just let it try and run your onboard charger. With the kind of time you can run this thing and that built in charger you would not have any problems keeping your batteries charged. Myself, I always like to keep my onboard propane full and a couple of 20 lb. tanks as well. There are very cheap adapters you can buy that allows you to either use a propane tank to feed your onboard propane lines (when your main tank is empty) OR use our onboard propane for an exterior appliance. So you can run that Alp off of your onboard propane supply as well. I am still on the fence about the dual fuel myself. But I am leaning towards just getting an inexpensive small gas generator that I can keep full and carry a couple of gallons of gas for situations where propane might be hard to find. I think a decision on a generator actually is a priority over a solar generator, because the generator works when there is no source of solar. And, you can charge a solar generator with the generator as well. The Alp is a PURE SINE WAVE inverter, so you can run any of your sensitive electronics, charge a solar generator, or whatever. It is specifically designed for RV living. For me it's an emergency device. I have a small rig and have a low wattage setup in terms of appliances for when there is no shore power.
