Exception could very well include Class B camper vans with Onan 2800i inverter generators and 11,000 BTU/hr air conditioners. They’re still common from many manufacturers including Thor. Fuel cost could be around $10 for the night.
A major problem with conventional generators to power air conditioners at night is that the A/C (at least compressor) will cycle on and off a lot, and when standard generators idle unloaded, they still use a lot of gas. Inverter generators at least reduce fuel consumption when running unloaded.
If I recall correctly, someone in this forum who ordered a new Axis or Vegas wanted Thor to install an Onan inverter 2800i generator in lieu of the standard 4000-Watt unit to make boondocking more efficient.
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