If these are like most, the batteries provide power for a week or so, then need recharged. hand crank genny inside most, to go with the hyand crank backup blower system. For long term use you are expected to buy a "Generator Module" you bury a short distance away. Optional water and fuel tanks of course. And for septic I have seen some with built in tanks and a perforated pipe "leach field, others use an external system.
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