I can comment on Progressive Industries warranty. WE purchased the portable EMS-PT30X in early 2016 and used it regularly through the camping season. It worked perfectly and we had one incident when it detected and protected us from low voltage during a period of high use throughout a specific campground. It continued to work well last season- but when we started camping in 2017, we received only rolling error codes. WE called Progressive Industries support line and they had us relate the codes and they said immediately " send it in" . We did send it back and promptly received a new unit with improved features. I wasn't sure what to expect, but can advise that I am impressed and satisfied with this level of customer service.
Jim
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