Hi,
Adding just an inverter isn't that hard a job.  Changing the wiring by
adding an inverter/charger to replace a converter can be more difficult
and more expensive.

You can get a 1000W inverter pretty cheap a really good one under $150.
You are going to pay lots more for a good 2000W inverter/charger.   If
you are not familiar with RV wiring DC and AC then you might want to
have it done or at least learn what's different between house and RV
wiring so you don't have a shocking experience.

If you just want to use the batteries to run small items like the
TV/VCR then you might just as well add an inverter and keep the
converter you now have for charging the batteries as long as it's
working ok. Two 6 volt golf cart batteries should supply enough power to
run those items for a few nights.

Just to run the TV and VCR/DVD player a 1000W inverter would be more
then enough. The inverter should be as close to the battery bank as
possible to eliminate DC voltage drop.  This makes for shorter runs of
cable from the batteries to the inverter allowing you to use smaller
cable while keeping voltage drop to a minimum.   So the closer the
inverter is to the batteries the better.  You can then run the 120V line
to the TV/VCR/DVD.  There probably already is a 120 volt line going to
these items.  That line probably now goes to a circuit breaker in the
120V panel.  You could find that line and tie the new line into it if
you know what you are doing.  Remember you need fuses or circuit
breakers to protect the DC side of the inverter and a circuit breaker or
fuse to protect the 120V line.  You should also put an on/off switch
somewhere to turn the inverter on and off.

You need to get the right size cable for the DC side of the inverter
along with a fuse or circuit breaker.  You also need to get wire for the
120V side along with a fuse or circuit breaker.  If you can re-use some
of wires, circuit breakers etc.  that you already have only you will
know.

If you do decide to go with the inverter/charger replacing the
converter,  then the above will only be marginally useful as you will
probably have to change some 12V and 120V wiring around.  Probably have
to run some new wiring too.  How hard or complicated it becomes depends
upon how much room you have and how easy everything is to access.

Like I said if you don't know what you are doing or not sure please get
someone who does to do the job or work on it with you.  Making mistakes
with electricity is not a good thing...

Hope this helps some.  Take care and Happy Campin...

I see where "sanman" <gsanter@msn.com> contributed:

See Rich A's post.   2k watts is serious overkill for what you want to
do.   I think if you go to the Xantrex site you can download the
manuals for their products.  You can then decide whether you can do
the job yourself.

Will Sill
"A great many people think they are thinking when they
are merely rearranging their prejudices."
William James