This is an example of a smaller one, that has been called a "power pack" or some other name.
It has a MSW inverter, sealed flooded battery, can use an extra battery--booster clamps go on the extra battery--recharge with an included charger, or in your car, OR with SOLAR. So nothing new there either.
It seems they have just got bigger and fancier and "Sales" has changed their name to "Solar Generator" :)
Still could be an alternative to an RV installation in some scenarios.
https://www.canadiantire.ca/en/pdp/motomaster-eliminator-powerbox-2000-0112028p.html#srp