We have our 2020 Ell parked at home under an awning. We turned the solar off at the driver side upper cabinet, and turned the battery switch off to our lithium batteries. The power button on the inverter panel to the right of the pantry doesn't seem to be working so I turned the inverter off under the driver side bed. I'd think there would be zero power to anything electrical however the lights still turn on. What am I doing wrong? My intent is to store my trailer for a few months without draining the batteries.