One of Bear's recent daily updates mentioned a freezer on a solar system. I've been running a solar powered freezer for about a year. I'll share my experience so hopefully someone else can benefit.
2 Renogy 160W 12V Solar Panels. I built the stand to face directly south and can be adjust seasonally to get optimum sun exposure.
4 golf cart batteries (6v each)
This was version A of the battery bank wired in series and parrell to get 12 volts. These were reconditioned batteries from a local Interstate battery facility.
Once things got a little more crazy a few months ago I upgraded the batteries to four deep cycle 12v batteries.
Renogy Rover 20 Amp 12V/24V MPPT Common Positive Solar Charge Controller.
MicroSolar 12V 600W (Peak 1200W) Pure Sine Wave Inverter.
The deep freeze we have is 540 watts so it operates fine with the inverter.
I brought this system online April of 2019. In the beginning I had the version A battery bank. It worked great through the summer (high sun exposure) and winter (lower sun exposure). One drawback was that the freezer started running non-stop. That ran down the batteries. To get around that I installed a Christmas light timer with a schedule of 2 hours on and 3 hours off. That keeps the food at 0 degrees give or take while controlling the run time of the freezer. In talking to a repair person it would cost more to repair than to just replace the whole unit. Low tech solution was the light timer.
The inverter is not big enough to run either fridge we have so the plan is to make ice and pack coolers in a long term power outage situation.
Just a disclaimer none of my work is up to code, but it works. I did do some math on wire sizing and always err on the side of caution and went larger. No melting wires or fires was my goal. Redneck'n at its best. Nothing in this system is tied to the houses wiring, no backfeed into the primary power is possible.
Hopefully this gives some an idea or two. I'll try to help as best i can if you have questions.