There are small kits like these:
Amazon.com : solar panels kit
Larger systems like these:
Solar Electric Supply – Leading Wholesale Solar Panels & Solar Electric Systems Suppliers
Anything larger like whole home, I would simply get some quotes from local solar energy installers. They will customize a system for you. There are low interest loans, tax credits/rebates available in certain areas.
I have had residential solar, battery storage, and 2 electric cars for the past 5 years. I am attached to the grid, but most of the time I don't have to pull from the grid, even at night. Saving hundreds of dollars per month. I don't like being dependent upon utility companies and pumping gas.
FYI, since you brought up the refrigerator,...I have a small plug-in timer for the power to my refrigerator/freezer. 2hrs on, 2hrs off. Have run it this way for years. Literally cuts the power usage in half. No issues with temperature.
My suggestion for anyone considering a solar energy system,...if at all possible, invest in making your home and appliances efficient first. Insulation, more efficient appliances, better windows,....whatever,...find ways to reduce your power consumption first. Then,...you won't have to spend so much on a larger solar energy system,...it can be smaller and less expensive.
Most people do not save that much money on a whole house system,...if it is just the house. Get one electric car,...the savings will be seen at the end of the month for sure. We are spending $250/month on our solar energy system loan. Previously, our electric bills were averaging $100-150/month for the house. So, that added $100 to our budget. Here's were it got interesting. We got our first electric car,...no longer spending $200/month pumping gas. Now, we were saving $100/month. We added a second electric car, further saving us an additional $200/month. So, we are now saving roughly $300/month.
Money in, money out. Once you figure out your budget,...if it works out for you,...go for it. We love our solar,...and the Tesla cars,...OMG,...never, ever, ever will go back to gas-powered vehicles. BTW, our first electric car was a little Nissan Leaf,...was actually some $15,000 less than the gas-powered vehicle it replaced. There are a lot of good, lightly used 2018+ used electric cars out on the market now,...and reasonably priced. You don't have to drop a lot of money into an electric car anymore.