Hi All, After reading my manual for the trailer and spending 3 hours reading this forum I am still confused. if I am off-grid but my outside battery is fully charged, will it provide electricity to outlets inside trailer? to fridge? and to heated mattersses and to fridge? I understand once i am on grid my battery is charged if hooked up to converter? I undestand I would need to upgradeit to 31 and buy a solar panel. Do I need inverter installed inside for the appliancers or converter will do the job and it is all prewired inside. I have Viking 2107 of 2013. Sorry I am a beginner and have my learning curve. thanks for your help Thank you!