Well for one thing, you are looking at a $90 inverter. vtpeaknik's inverter/charger lists at about $1200.
You want something to play with as a toy? Want to throw it away like a child throws away a toy when you're done playing with it? Maybe don't want to play with it too often? Harbor Freight inverter perfect for you.
I built a little system with a similar inverter that you are considering for my garage that supplies my needs out there though. My needs are: Air compressor, 1/2 HP motor 20 minutes/week. 48W CFL lighting 30 min/week. Table saw 1/2 HP 1 hour/year. 12V TV 1/2 hour week, 12V radio 5 hrs/week.
I'm totally off grid, my little system does great with my little, occasional loads.
Vtpeakninik's system blows away my garage system though, 'cause he bought larger blocks to scale his system to. My Xantrex 1500W MSW inverter can barely start my circular saw. I'm afraid to charge batteries on my MSW inverter for 18V tools because the waveform sucks. I can't charge my system batteries from a 120V source, he can.
We both have about the same amount of battery He's got twice the solar panel I do, I think he has an inferior charge controller but that's my opinion.
It's hard to do, but possibly more cost-effective if you sort-of scale your system first, and then start buying stuff. It's entirely possible that $90 inverter can do everything you need it to, for years on end. My garage has been fine for years on a cheap inverter with generator backup.
Refrigerators/freezers seem to be the first thing people want to take off-grid, but in my experience, they should be the last things, because of their energy appetite.
Good luck!