It seems to me that the sequence of connecting these items leads to confusion. To me (electrically challenged)it would make sense to have the surge protection first (no low voltage cutoff), the autoformer in the middle, then a low voltage cutoff to the rig last. This would protect the autoformer from spikes, let it do it's job with the low voltage, and if it can't boost the voltage to keep it in an acceptable range, the cutoff would protect the trailer (an auto reset would be mandatory for me to protect animals while away).
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