4 22AH sealed Pb batteries, new ($152), a charge control with cutoff ($55), and a couple of 40W panels ($229 total).
I use Anderson power pole connectors for safety.
With the small inverter I have for that setup, I can't run much, but I can recharge phone batteries, run radio equipment, a light or 2 and a fan.
It will run a small fan all night long. That much I know from the last power outage. ;)
/johnny
Could you add more batteries and increase its capacity? The panels should keep them charged for light use. One advantage I have here in Florida is the amount of sunlight we get.
The systems I’ve seen online are much more expensive then what you just posted.