I ended up in India during the lockdown. Power outages are frequent and so are voltage fluctuations. Most people have a generator. Most houses haves 3 phase power coming in. Basically anything over 3 kvA the utility guys put in 3 phase at 415V - 3 hot and a neutral. About 3 weeks ago we lost neutral which resulted in double voltage both my MBP chargers got fried including the long extension wires which are super useful. It also took out an AC, a refrigerator, 2 air purifiers. Anything connected to the BackUPS did survive including the 65" oled tv. Luckily we managed to fix all of fit with simply replacing the PCBs. Being stranded with my laptops would really have sucked.
Since I am stuck here til next July I started fixing some of this. More than anything else power conditioning was the single most important thing. Anything with any reasonable switch-mode power supply will be fine on a line interactive UPS, most people don't need to spend $ on an online UPS - esp if your power is fairly clean. We had old locally made generator so I finally replaced that with a nice single phase 25kVA generator. The alternator has voltage regulation. For the mains power I was told most people just put a Servo Stabilizer but I didn't want any moving parts so found an IGBT based static stabilizer instead.
Get phase monitors for your condensing units. There’s nothing more annoying than loosing a compressor due to your poco’s incompetence when the compressor would be just fine if something locked it out as soon as the power got weird.
I did a compressor change out on a package system last year because while we apparently sprung for all sorts of other “options” on the machine apparently the line was drawn on a $48 phase monitor. Our cheaper machines had them and rode out our service being single phased, and the package units stage two was thankfully off at the time; but we still had few thousand dollars of compressor needlessly converted to a piece of scrap metal.
Since I am stuck here til next July I started fixing some of this. More than anything else power conditioning was the single most important thing. Anything with any reasonable switch-mode power supply will be fine on a line interactive UPS, most people don't need to spend $ on an online UPS - esp if your power is fairly clean. We had old locally made generator so I finally replaced that with a nice single phase 25kVA generator. The alternator has voltage regulation. For the mains power I was told most people just put a Servo Stabilizer but I didn't want any moving parts so found an IGBT based static stabilizer instead.
http://anjalipowersystem.com/static-stabilizer.html https://download.schneider-electric.com/files?p_File_Name=JS...