I've gone full DIY for my setup. My primary one is a hybrid on/off grid setup, with the on-grid part being that the inverter has a mains utility input for powering any devices plugged into it should there not be any panel activity and the batteries are drained. But, it doesn't feed back into the grid (important to not charge the grid wires if there's technicians working on it, but if power dies, I'm likely going to kill the main breaker regardless so I can use my inverter generator if I wanted, since that can also be used to charge the batteries and power stuff).
My inverter powers a few things with a total capacity of 30A that I have split between two 15A circuits, one in the house, and the other in the garage.
My panels are ground based, purchased secondhand for a steal, about $0.05/watt. About 3kw worth, probably going to add some more to safely max the input of the inverter. Battery backup is LiFePO4 batteries, about 15kwh worth. I'm aiming to get it up to 30kwh before summer really hits.
As of now, I can run a chest freezer for about 20 days without any sun, or the majority of my "high priority" stuff (NVR, local networking gear, etc) for about a week. Pretty happy with it. The most expensive single piece was the hybrid inverter. Even the PV combined box wasn't that bad of a deal, and made it easy to hook things up. I have a secondary setup that has about 1kw of panels, 3600Wh of battery capacity, and a 2kw inverter. That one is entirely off grid.
I've built two solar systems so far. One was enough to power my cell phones for a week. The second was to be able to charge my power tool batteries and a CPAP with AC plugs. My next step will be to build one that can power my refrigerator. But there is a huge price difference between steps two and three and a large Gulf between practicality and investment. So that one is waiting. I need a new roof first.
Have you considered dropping down to a chest freezer and mini fridge when needed? The two combined can pull as little as 50-60W (each about 25-30W on average). A full size fridge draws a lot more since they're a lot less efficient. The chest freezer especially is beneficial since worst case, when properly filled, can go 3 days or so without power and still remaining ice cold.
I have a chest freezer and I have considered the idea. I know that chest freezer requires a whole lot less power than a refrigerator.
The refrigerator is the bigger goal here. If I can run the refrigerator of a solar then I can easily run the chest freezer. Getting the refrigerator to run off of solar means I automatically have the chest freezer covered.