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Originally Posted by dstankov
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No all coaches come with an EMS, however, if a generator is installed all coaches should have an ATS.
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Perhaps they should but don't always. Is that a big negative?
At least one Thor Class C I rented with Onan 4,000 watt generator relied on manual connection. And it really didn't seem that bad. My Coachmen was the same way.
Basically the shore power cable was plugged into generator while traveling or any time there wasn't shore power. When setting up, the cable was unhooked from generator and plugged to campsite recepticle. To be honest, beyond saving 5 seconds per setup, I'm not sure what an automatic transfer switch accomplishes.
Do you recommend it as a must-have? None of these had an inverter but I don't think that would change much as far as generator ATS goes.