Portable Solar would give you some lights, charge your phone and maybe run your fridge enough to keep food for a short time. The setup that works for a whole house would entail a large group of solar panels, usually but not always mounted on the roof, a large number of lithium batteries 8-10 or more, solar battery chargers, inverter (at least 3000-5000 watts) and other misc components needed to convert the solar electricity and protect the batteries. A fairly large investment but can be done. A gas or multi fuel generator is simpler to setup but depends on the fuel source to run. NG or propane are a good choice. Propane has the plus that you own the tank and fuel in it but in an extended emergency it might be hard to refill the tank. NG aid great, unlimited fuel, as long as the gov doesn’t shut off the supply.