In my case I get by pretty good just having the ONE 2000i model. We like camping off-grid using a bigger 12VDC battery bank. Using add on power inverters we can run every ecpet the Air COnditioner. I have a second smaller microwave that will run either from the Power Inverter or Generator.
We do all we want to do in the one day/night without air conditionering and then the next morning will use my 2000i Generator for a three hours with my trailer plugged into it to charge up my batteries. I keep a close watch on the batteries and never let them get below the 12.0VDC Charge point which is appx the 50% charge state. Then after charging on the generator for three during breakfast every morning we are good to do the day/night run again off the batteries.
I can do a good week of this 50% to 90% battery bank recharge without doing damage to the batteries. Then I will do a full 100% charge rate when we get back to the house where I can go for 12-14 hours of charge if needed being plugged into the garage..
Been doing this for several years and got a good long life out of my batteries 5-6 years worth...
It all depends on what you want to do camping I guess... My 2KW Generator sits secured in the tail gate of my truck bed and gets used quite abit for camping and other emergency power needs... I just pull it out on the tail gate and fire it up... It goes where I go...
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We are most often Creekside somewhere and keep cool just by running the on board fans etc...
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Roy Ken