Forum Discussion

bob213's avatar
bob213
Explorer
Mar 29, 2015

Strange power problems with PI EMS 30 and autoformer?

Sorry for the length of this but details help: This is not a first outing with these items. Connected as follows: 30amp Post,-PowerMaster autoformer,- PI EMS-30,-trailer. Post had 50amp/30amp/20a...
AllegroD's avatar
AllegroD
Nomad
Mar 30, 2015
bob213 wrote:
Connected as follows: 30amp Post,-PowerMaster autoformer,- PI EMS-30,-trailer.


The above works, if all equip is working as designed. You want the autoformer pre-PI EMS so the autoformer can boost voltage and the EMS only shuts it down when the autoformer cannot get voltage up. Been doing this way for years.

As other have said, it really sounds like a shore pole problem. Be interested in your testing om another source and with each device solo.

Do you also have an ATS?

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,337 PostsLatest Activity: Nov 21, 2025