High frequency verses low frequency inverters

Ellcon123 said:

You are assuming one is more efficient than the other which isn't the case. Depends on what you buy or make.

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You are correct. The Efficiency I was referring only to wattage used in idle time.
As LF generally use more the HF
I should have been clearer but felt I was rambling and didn’t want to go overboard

Would agree that most HF's have good idle, even cheap ones. A good LF with toroidal transformer though is 20~30W idle so no worse than a HF. Mines about 22W. Again, depends on what you buy.

10 year warranty is simply the price to enter the California grid-tie market.

Other than that, I remember longer warranties on cars as a way to entice or give confidence to buyers who knew some foreign brands were more reliable.