The Big Surge?

[Rocky]

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Grounding is the most important aspect of any electrical installation. Almost
all of the people I know in the DR have good ground features at their homes.
Anyone that owns a house with no ground should install one ASAP. Personal
safety is way more serious than an inverter burnout. A typical ground copper
rod at 5/8" driven 10-12 feet into the ground can provide minimal req'd
ground to the main panel of the house. Connecting a heavy gauge copper
wire to the main water supply pipeline is also added protection.

Xantrex/Trace inverters require multiple grounding. For those people that
lost their inverter manual, here is the file (large version):

http://www.xantrex.com/web/id/346/docserve.asp

Many thanks to DR1 for hosting my comments.
Georgios.

Conversely, I know of few people whose houses are properly grounded, if at all. Just to get my friend's condo grounded last year, we had to put 3 rods in, and still it would be borderline for any and all potential electrical problems.
The point I am trying to make is that the OP's question dealt with protecting the inverter, and, as per the manufacturer's manual, you must have an inline fuse in the hot line going in, and even if there may be a better solution, the cost is restrictive by way of all the components needed to set up the system you suggest.
Don't get me wrong. I was very interested in reading about the units you suggested and I can see how there could be a market for those products, but this is a particular case that can be resolved with ease at a very low cost.