I have had both a Carrier and a Tripac and the Tripac is way better !!! With the Carrier if you want 110 volts, for TV or ??, you have to start it but with the Tripac it will run a low drain 110 appliance for a while then start it's self to re charge the batteries then shut off even though you are still useing the whatever. Found the Tripac cools a lot better to, when the Sun is boiling down and it's 115 outside. Lot quieter unit to.
Gave away my Carrier, after useing a friends truck that had a Tripac to compliet a contract, and had the Tripac installed on mine.
Just have them install the optional 3000 watt inverter, saves all the beeping when you try to run the fridge, micro, water heater, TV etc. at the same time
Think it was $225 extra.