Pure sine wave inverter suggestions?

Kayteg1 wrote:

Lot of people are skeptic about cheap Chinese stuff, but guess where is manufactured the expensive stuff, even when it has "assembled in USA" label?

There's a reason why the cheap Chinese stuff is cheap -- Chinese manufacturers can do first rate work when they are paid for it, but often times, they are asked to make things as inexpensively as possible.

For example here's a teardown of a genuine apple USB charger

And here's a teardown of a cheap knockoff


Here's the conclusion from that teardown:

I wondered how this power supply could have met the UL standards with clearance less than 1 mm. Looking at the charger case more closely, I noticed that it didn't list any safety certifications, or even a manufacturer. I suddenly realized that purchasing the cheapest possible charger on eBay from an unknown manufacturer in China could actually be a safety hazard. Note that this sub-millimeter gap is all that's protecting you and your phone from potentially-lethal 340 volts. I also took the transformer apart and found only single layers of insulating tape between the windings, rather than the double layers required by the UL.

That's not to say that all Chinese products, or even all cheap Chinese products are bad or unsafe, but there is a difference between cheap no-name products and a well known name brand. It's true that you pay a premium for that extra quality - the power supply in the teardown was estimated to cost around $11, but apple sells it for $30.