This is my DIY prep of 2020.
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2600 Watts of Solar, 2 parallel 2400 watt inverters and 4 lithium iron phosphate batteries. Inverters feed a 10 breaker reliance transfer switch to power critical loads as a see fit.
I also fixed my pool heater last summer and added two propane tanks and a Genny hookup. I then added a US carburation motor snorkel to my gas generator so now it's tri fuel and I can run it off those propane tanks.
My current plan is to offset my electric bill by powering several critical loads via solar then have it cut over to the battery overnight. If batteries get low or if it's cloudy it will automatically cover cut over to pull power from grid. If the grid is down in that scenario I can then power the entire transfer switch and charge my batteries with the gas / propane generator.