They're the same, the world over. I have a small system because we are subjected to power failures at a weekly rate, more or less. The driver is the power that I need for home heating in -20C weather (like last night and the week to come). I've used it every year for the past 15+.
So, the first thing to do is estimate your power consumption if I were to pull your plug. Then double that. Most electric motors with universal windings act like a dead short on start. The inrush current is about 2X the running draw.
I believe that 12VDC will be the system standard for decades. There's so much of that stuff out there already.
Inverters come in 3 flavors: square wave (for lights, etc), modified sine wave (lights and a few motors) and pure sine wave which can run any motors and all lights. I have all three of them. The pure sine wave is the main unit of house power generation.
The inverters use some electricity to power their own electronics. They can only suck so hard on the batteries. My system quits at 11.6 VDC (down from the storage peak of 13.6VDC). There isn't enough juice left to drive the inverter.
Batteries store the juice, day and night. Day and night, your inverter will be looking at the batteries for supply, not the PV panels. Big battery budget is the best thinking.
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If you got this far, here's some free advice from hindsight:
If it's your intention to use this system for essential services at home in a power outage, skip the PV panels and buy more deep cycle batteries. Buy a big, fat smart battery charger that runs off your mains. You can reload your batteries even at night when the power comes back on. I am happy that I did this.