I have a few small 500W-h solar batteries mainly to power small electronics/lights/ham radio/comforts in case of an outage along with 120 watt panels. Recharging them with solar is an option in the summer, but winter months produce < 1/2 the power (at least in the Northeast), so additional rationing is needed to run solar in winter. However none of these is going to run anything big like a fridge, water pump, heat, etc...they are just for small electronics during a short (or very long) outage. You can easily move them where you need them to run a TV, internet modem (if cable/fiber is still up), small lights, charge phones, run a radio, run small fans, maybe a coffee maker, etc.
Even a large 2000+ Wh solar generator won't really come anywhere near running a house for long. I have a friend who built a full size solar array (30+ 400 Watt panels I think) and bought two Tesla powerwalls that generates several dozen KWh per day in the summer, but he also has many 10's of thousands of dollars tied up in it. Even then the powerwalls will only store a day or two of energy at full home usage.
To run a fridge/freezer for any reasonable amount of time you need a gas generator. My strategy was to actually purchase very small 2000 watt generators, and run them every 4-6 hours to keep the fridge powered along with recharging the solar/batteries. The main advantage of using a very small generator is that they can run about 6 hours on a gallon of gas, so if you have 20-30 gallons stored at a gallon or so a day you can keep your fridge and electronics fed for a month or so. A big generator is nice, but its hard to store enough fuel for long unless you have a propane generator and 300+ gallon tank.
Obviously you also need to have cooking, water and heat. Fortunately I have a gas stove with a large tank for it, plenty of wood and a wood stove for heat, and also a fresh water source nearby I can filter.
So to conclude - yes the solar batteries are nice for small electronics, but probably too expensive and limited to run large appliances without a huge dollar investment. They can be a nice supplement for small gas generators as they keep you from having to run the gas generator all day. If I had a 300+ gallon propane tank, I would probably buy a Generac or other whole house generator. Without the large propane tank its really not practical to store enough gas to keep a large generator going very long - so small generators used strategically may be your best bet for an extended outage.
