Why would anyone prefer to charge a phone from a mains charger through an inverter rather than a 12volt cigrette lighter socket? Unless thats the only charger you have available of course!
Also, what happens inside a 12volt charger for a phone for example that doesn't happen in an inverter? The "chargee" still must get the same voltage from both, is it just most things like phones require a voltage closer to 12 than 220 so the smaller step means greater efficiency??
In my case, i bought a shiny new pc with lots of disc space for photos etc, thinking i would buy a posh sine wave inverter, encase the pc box in foam to keep the dust out, and have a disc drive, keyboard etc etc on long leads so i would never need to access the pc itself. But having looked at the input wattage of both the pc and the nice efficient lcd screen, and best advice seems to be get an inverter capable of twice what you need, even two sine wave inverters (cheaper than one big one of identical capacity) were more expensive than binning the pc and buying a new laptop that could run happily on 12volts!! Thats before looking at the battery requirements to power a big inverter!
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