RE: 2009 Damon Avanti No power ?
Have you yourself actually measured the voltage at the battery terminals?
Sitting on a dealers lot they may have run down.
RE: Michelin vs Toyo tires
Did you check the tire pressure? Over inflated brand new tires will do that.
On my 2004 La Palma with Michelins I run 90lb all the way around. Based on my weight the tire pressure chart calls for 85 front and 80 rear so I add a bit for a margin of error.
RE: No Power Thru the Power Cord into the Rig
https://www.amazon.com/Voltage-Eversame-80-300V-Digital-Household/dp/B09CGS7XV8/ref=sr_1_6?crid=3C2JY6M9QXWYT&keywords=110+plug+in+volt+meter&qid=1660058391&sprefix=110+plugin+volt%2Caps%2C147&sr=8-6
I keep one of these plugged into an outlet all the time. When it gets down to 108 volts I turn off the air conditioner.
RE: Severely damaged windshield … is yourMH totaled ?
…. Of course you have proper insurance… but what happens if the windshield isn’t available ?
What year, make and model Motorhome do you have?
I've been on three RV forums 15 years and never heard of anybody not being able to source a windshield.
Perhaps this is a first?