Hi Cheri,
We Have had progressive for 3 years and been very satisfied.
Andrew you are correct depending on the year of the coach one could possibly have a surge protector built in. If you post your coach details it will help us better answer your question.
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1976 Newell Classic (Sold)
Home Base: Riverside, CA
If anyone needs my contact info private message me and I will send it to you.
-Joseph-
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