Well Ive had 3 inverters so far ,all 240 Volt. All Chinese made and bought on aliexpress or ebay.
One a little blue thing for $43 odd bucks was pretty useless . 500 watts I think and it would only just light a desk light. Would not run a 170watt TV.
first try
Second a 500 watt cheapie at about $135 and it ran for 18 months and died .
Third a 1000 watt cheapie at about $141
Third (first try) This one was noisy rubbish when it ran my TV so I complained and they suggested I bought the better model for $175 and return the other which I did .
Third (Second try) Better One
The third is still running OK after about 3 months and I have had it running my TV , my dryer,my full size washing machine ,my small box freezer and my desktop computer which it is running now. No complaints so far except it shows the battery voltage at about half a volt down on true. There is probably an adjustable pot in there for that but I have not been in it yet to insect proof it.
I spray them with lanolin spray ,let it dry then spray some surface insect spray to stop the bugs getting where its warm and light.
I notice the Grid Tie inverters I have accumulated from Gumtree ,second hand, all work fine even though some of them are many years old so that's a proof of longevity for chinese made gear .
I think if you insect proof your inverters they will last much longer. I have even gone further and smashed led's that attract insects on smoke alarms and other devices running 24/7. This is a common problem with 5V power supplies running remote gear . They insist on putting in led's to show power on and there is no way to switch them off when you leave them unattended.
Heat of course is endemic and forever attractive in cold weather.