There are many resources. It took me a while to comb through the info I found. I found unboundsolar has pretty good resources. You need a solar calculator for where you live to determine your solar days. This will help you size your panels. Then you need a household watt calculator to estimate your power requirements. Also, your electric bill is helpful for this. Keep in mind during a crisis, you may not need as much power as you would normally use. For example, I won't run my air conditioning or my electric clothes dryer.

Electric motors, such as septic tank and well pumps have very high current requirements to start them. This will affect the type of inverter you may need. I went with a low frequency inverter because of my high current requirements for all my pumps. A high frequency inverter is much cheaper and more efficient than what I bought because I needed the instantaneous starting current a low frequency inverter offers.

Lifepo4 batteries are the best bet, they can be cycled much harder and more frequently than flooded batteries. Yes, they cost more, but I determined the cost was well worth it. Having said that, you can buy cheap (China made) banks of batteries since the individual cells are all the same. China makes them all. Sadly. I did buy batteries assembled here in the USA so I paid more probably than I needed to.

The panels, well, I bought the cheapest ones I could find. Again, most of these are made in China. The MPPT charger, I bought MidniteSolar. It seemed reasonable for the money.

Good luck.

Start browsing diysolarforum.com, it’s the greatest resource I have ever found.everything Is there.