Automatic Generator start with loss shoreline electrical

Onan has a generator controller similar... The EC-30W.

When I was working on a Transit build (now cancelled, mainly since a family member feels too cramped in a "B"), one of the items I was considering doing was going with a 24 volt battery bank, and a Magnum Energy hybrid inverter that takes power from two 120VAC sources, either one by one, or both running. A nice bonus is that if there is a brownout, the inverter will boost voltage, using the batteries to compensate.

This is about a $3000 solution, factoring in the inverter, a generator controller, a control panel, and a battery monitor... but it will allow for seamless transitions of power between links.

I have Magnum AGS-S on my generator. It does not start generator if shore power is lost. It has 2 settings that are set. One sets temperature that generator will start when inside temperature exceeds a setting. Mine is set at 80°. The other setting is set for starting generator when battery voltage is below 12 VDC.
I have used it when boondocking and when we leave our dog in MH as a safety when it is warm out and shore power could fail.
I purchased mine off EBAY for a good price. Many places sell it for about $250.

An AGS is the way to go if there is a power outage when the coach is unattended. They will do the same to maintain the battery bank when boondocking. Magnum Energy, Onan and Xantrex all make good equipment. Every one that I am aware of does a prime before starting and if it fails to start will repeat the process.
Simply set the thermostat for the furnace or AC and the AGS will maintain everything automaticaly.
Most gennys burn 3/4 gal/hr under full load.

Yeah, it would be helpful to know what the OP's equipment is.

Since I don't know what a Magnum is, can't really offer much more. If you have one that you have to prime a bulb, set the choke, then crank (hopefully start) then take the choke off manually, I'd believe auto start would be tricky. Still, people buy "portable" generators for home backup use and I imagine some start automatically.

I gave the Onan just as an example off the top of my head. I have the Magnum. Sorry for any confusion.

Is this a little ONAN like the MicroQuiet 4000 (4KY) series? If so, does yours start every or nearly every time you push the switch to START? I only ask because ours usually needs me to Prime it by holding the switch in STOP till the fuel pump runs. Sometimes twice, before it starts and then it runs great. See if the Auto system senses what's going on and adjusts for it.

yep, here's a few to browse:
Magnum Energy

or
Xantrex

Just be aware and keep your fuel full since most genies can burn 1.5 to 5 gallons of gasoline per hour of run time. gas, propane and diesel genies vary of course.

Dave

Onan (and others) make AGS systems (Auto Gen Start). We have one and it's come in handy a time or two.

Yeah, things can go wrong (line noise causing the generator to start, in our case). But the genny doesn't use that much gas and whatever it uses is a bargain for the peace of mind of knowing your pet isn't roasting.

Its just me but having an auto start for things that use fuels etc really scares us to use when unattended. So many things can go wrong...

We always just made sure we have fresh water available for the animals and a 12VDC fan going...

Roy Ken