MOTORHOME  NOT  BEING  USED   ???
Is your motorhome sitting round  ??
While its not being used  it is important to prolong battery life 
of both the start battery and also  inhouse battery 
Yes you will have a solar panel  but this is only a surface charge  on your batteries

A deep charge  is required which means  you must plug into mains power  at least  twice a month 
for a couple of days at a time  ...  this  gives all your batteries a deep charge  - and long life
when batteries  fully charged  the  smartcharger in the motorhome  will switch off  .

If you dont do this  then you will have battery issues  sooner than later  

Please note  :
You can  Not put a cover on your motorhome  .. No solar panel  and  it will damage Duraseal  
And when parked inside a shed or under carport you will need to be plugged in to power all the time   

Dont forget  to Leave  your  Control  panel left on all the time  ( so it shows the orange light ) 
and light in middle is plugged in charging