Air cooled units do not need commissioning, only liquid cooled industrial units. Homeowner can do his own valves. Owner can install, start and service their own air cooled units.
But if there done wrong and engine damage occurs, theres no warranty.
I have lots of customers that never shut their units down during long outages. Ive never had one fail on the units i work on due to this though.
sure can. a whole house switch has been around for many years. they also have versions that are approved for use in Canada. (CSA Approved). for whole house use, you generally need a service rated switch, and it gets installed between the meter and the house panel.
Generac transfer switches make it possible to switch between utility and generator power.
www.generac.com