You should read the specifications for yourself on the units your interested in. A lot of the info here is wrong.
The Tripac does not provide 780 watts of power. Allan is confused about that. They are talking about the alternator which is only for charging your batteries. The Tripac does offer 110 but it's an optional feature.
The Rigmaster maintenance interval is also 1,000 hours. That's why Tripac followed them with the same idea. They both basically increased the oil pan from 1 quart to 3 quarts.
Rigmaster by default provides 6,000 watts of 110 power, 20,000 btu A/C and 12,000 btu heater. It also has the auto start and auto stop and only comes on when needed.
You need to read about all the units out there. They vary so much in functionality and price so you need to decide which is best for you.