I would connect it to power for that amount of time if I were you. You need to reduce that charge rate of the inverters as it defaults to 50 amp service which you will quickly overload your source connection.
While I have never left my coach without power very long (mine stores at 50 amps in my driveway), if you will look back thru two pages of topics here, you will see several threads of people who have tried to leave their coaches without power who have come back in 10 days or more to find their batteries dead. There are lots of " static discharges " on our batteries which are not cut off by the standard disconnects. Also, several owners more sophisticated than me on this issue who will give you the specific steps to set up for minimal, but important low level charging on 110 VAC , they should see your question if you give them a day to see it. Be sure to understand that.
Gary
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Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5FI
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