Protecting Trace inverters [RE-wrenches]

[Robert Warren]

I have a question about protecting Trace inverters from possible input 
spikes from a diesal generator. I recently had to send in two Trace 
SW-4548E's for internal AC board replacement, which Trace would not 
warranty. They acknowledged that I had it wired correctly (I used a 
Trace paralleling transformer), but said since the same fault was found 
in both inverters (which had previously worked trouble-free for one 
year), that "it had to be an external problem."
 Now, if it was a spike which took out these power boards, how big a 
capacitor (or maybe an MOV or SOV??) should I install to protect against 
this happening again? The generator is a 15 kW, and is just one year 
old, and seems to be just fine. But I have never put a scope on it to 
see if I might be getting any surges or spikes.  
 My next question is, if this is something which ought to be done to 
prevent the same problem later on, why doesn't Trace provide an internal 
filter on the AC power board? How many other people have had this 
problem?
Robert Warren
robert.warren at solarcentury.co.uk 

What will we do if there is another fuel shortage? 
> >Did you know that there is a pollution free, completely
renewable fuel which you can use right now in your own car? 
Don't replace the engine, replace the fuel.
Check out my website on making your own fuel: 
http://running_on_alcohol.tripod.com 
robertwarren at mail.com

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