I came across an Eaton / Cooper Bussmann 1800W True Sine Wave inverter with built in 20A rated transfer switch on Amazon.ca at what looks to me to be a pretty good price.
CDN $415 on Amazon.ca (Canada) delivered tax inc. Shipped by Amazon.
$300 to $350 on Amazon.com - I don't understand the different prices from the same seller ? ? ? Might be shipped by the seller and not by Amazon. Maybe someone with a Prime account could check. Same seller as on Amazon.ca.
I have absolutely no connection to the seller or Eaton / Cooper Bussmann.
There are higher priced models that also include a built in charger. The low priced units are for the inverter with a built-in transfer switch (no charger). The 20A transfer switch is ideal for a branch circuit in an RV.
I went ahead and ordered one from Amazon.ca. I have no idea how good it is but thought I'd share the info. It's marketed to the trucking industry for use in sleeper cabs powering microwave ovens and CPAP's and laptops etc.
Check page 32 for MIL spec (Vibration & Shock), SAE tests, UL & CSA standards here: http://www.cooperindustries.com/cont...2-110-1xxx.pdf
Looks very similar structurally to some Xantrex models but the specs don't match exactly. The similar looking Xantrex units look to be ETL listed and perhaps do not have actual UL or CSA marks. Check it out for yourself.
While researching this inverter I came across a few posts on RV forums about some similar looking Xantrex units not liking Onan generator power if out of spec. I don't have a Onan so not a concern for me. Probably worth looking into if you plan to use the builtin transfer switch and also use an Onan. I don't know if the Eaton / Cooper brand inverter has any connection to the Xantrex brand. The remote panel & errors codes etc are very similar though.