I got my Ender 3 V3 SE last night. Was up and printing in 30 minutes. First time I have ever touched a 3d printer. I think the auto leveling is the key to success.
I've just tested my Mecer 1200va with this exact generator and it works perfectly. The battery started charging after about 20 seconds.
I don't think the rg-2600i has evo throttle.
Try cleaning the print head and flushing the ink before you send it in. The heads get clogged up if you don't use it often enough. You'll find the option under printer properties, general, maintenance.. You may have to do it a few times before it works. It still an issue try flushing the ink...
The sonoff touch switches works like normal light switches when wifi / Internet not available. Not sure about the minis. Have an idea they might work as well.
I went the sonoff touch way for multi gang switches. The touch switches are not to everybody's liking, but flashed with tasmota they work well with HA. For single lights I threw a Sonoff mini in the box behind the light of light switch, tasmotised as well.
I would also look at zigbee devices...
Spoke to another agent. Confirmed that you have no choice to stay on old account. Only active email accounts will be upgraded, not every sim card. I also supplied a link to this thread that he promised will be given through to his managers.