FWIW, I contacted PI regarding using my EF3000ISEB several years ago.
To: Info
Subject: EMS-HW50C and Yamaha 3000ISEB
Hello,
I have installed an EMS-HW50C in my 5th wheel.
I also have a Yamaha 3000ISEB generator that I use with the 5th.
However, I have noticed I have to flip the switch to turn off the EMS on the remote monitor of the EMS or I do not get any power into the trailer.
Is there a way to get around this and use my Yamaha and still have the protection of the EMS?
Or because I am solely connected to the Yamaha, do I not need to worry about protection with the EMS?
I received the following back:
Hello, Regarding the use of an aftermarket generator, yours is a common problem. It is caused by the fact that there is no connection between the generator and chassis ground, this is seen as an open ground by our device. This message has a pdf file attached that will show you how to solve this problem. Once you do this there will be no need to switch the HW50 off and you will have full protection again. Thank you for using our product. Regards, Donald Customer Service
The pdf was how to make a ground/neutral plug. I got the same message also from Thomas (not sure if I should include last name) at PI.
Neither indicated any issue with using my generator, and in fact they both encouraged me to use the EMS device with my generator.
