Unless Escape has changed the wiring, the solar controller goes directly to the battery(ies) and turning off the battery disconnect does not disconnect either the solar or the tow vehicle connection. It does disconnect the battery from the converter. If you are plugged in to a 120V source, with the battery disconnect switch off, the converter will power the trailer, but not charge the battery. If the converter is not powered, with the battery disconnect off there will be no power to the trailer lights or appliances.
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