I have the 2000 watt PST, which is the big brother to the 2000 watt SSW. There’s a couple of differences which may or may not justify the price. Either way, I’d be very hesitant to run 1400 watts for 30 minutes off 12 volt, even with 4/0 wiring on my FLA batteries / Inverter combo. My microwave will run about that, and I still have not tested that with a bag of microwave popcorn. 1400 watts could pull 110 to 130 amps for 30 minutes, and that would be a heck of a drain on my system.
The SSW is not UL458 rated. UL458 means its a good inverter and will live up to specs. What else UL458 means, I don’t know because I’m unwilling to pay hundrededs of dollars to UL to read the exact specs.
The SSW does not publish “draw with no load,” whereas the PST does. For reference, my PST pulls 1 amp, but the SSW I’m not sure.
The SSW does not have remote monitoring or remote on and off. I’ve noticed an excessive draw by monitoring the remote gauge. So, I was able to go to the crockpot someone plugged in and shut it off, or saw my DC converter, which should not have been on, was drawing 700 watts trying to charge itself, so shut that off. That monitor is not necessary, a battery shunt would have said the same thing, you would not have known if it was the AC or DC.