Progressive EMS will not work with Yamaha Generator

[Ed9824v]

Progressive EMS will not work with Yamaha Generator, I have a 3000 watt Yamaha generator and when I use the EMS-PT50C - it will not start , fails on I believe it was E2 open ground, I did try to take a wire from the ground lug on the gen. to the trailer frame with no luck and suggestions. ED

[time2roll]

Ed9824v wrote:
I will have to try the 100K 1watt resistor, But problem number two. when I try to start the AC with the ems connected and generator off of idle the gen overload trips with the ems out of the circuit the AC fires up and works. not sure what the reason for that is. Microwave works with the ems and generator but not the AC. Not really sure how important it is to have the ems when running my own generator anyways.

EMS is not very important with an inverter/generator. Low voltage and the generator will shut down.

I agree the EMS relay drops out too easy when starting a big surge load with a marginal generator. I think it is lack of voltage to even keep the coil energized during the start sequence. Would help if there was a capacitor or something to hold the coil energized for 3 to 5 seconds on the generator. You may still have the issue in EMS bypass mode.

I have pretty much given up on using the generator anyway. I really don't want to lug more generator around or run it all day to sit inside. If it is that hot we are looking for hookups and the solar keeps the battery charged.

[FLY_4_FUN]

because of the open ground fault using my Honda, I simply shut it off when using the genset. I of course turn it back on when using campground power

Daryll

[tvman44]

Your best bet would be to bypass the EMS, your voltage is apparently dropping below the threshold with the A/C starting up. Or you could take the gen out of eco mode. 🙂

[Ed9824v]

I will have to try the 100K 1watt resistor, But problem number two. when I try to start the AC with the ems connected and generator off of idle the gen overload trips with the ems out of the circuit the AC fires up and works. not sure what the reason for that is. Microwave works with the ems and generator but not the AC. Not really sure how important it is to have the ems when running my own generator anyways.

[time2roll]

Use a 100,000 ohm 1 watt resistor to connect the neutral and ground pin of a replacement plug. No cord attached. Put the plug into the generator 120v outlet. Plug the RV into the other 120v outlet.

Resistor will fool the PI EMS without introducing 60v to the RV frame. Ok the voltage might be there but the impedence is high and you would be looking at less than 1 milliamp current which is far less than GFI 5 milliamp trip.

And yes I have a PI EMS and the bonding plug with resistor.

[vic46]

RoyB wrote:

"bonding plug for the generator and plugging into the 120VAC receptacle socket"

I would appreciate some clarification on what "120VAC receptacle socket" means.

Thank you;

Vic

[RoyB]

Looks like we posted the same answer at the same time haha... I've heard that works great.

At least my comment came with photos hehe...

Roy Ken

[Ed9824v]

Finally got a hold of Progressive dynamics and the solution is to take a new male plug and jumper the ground to the neutral and it will work.

[RoyB]

I have read about some making up a bonding plug for the generator and plugging into the 120VAC receptacle socket. Just grounding the generator frame is not doing anything... Read up on BONDING the generator output..



This might work for you as well...

Just my thoughts
Roy Ken

[Norskeman]

Not sure this will help you (don't think you can bypass your unit). You may not want to use the surge protector with the generator supplying the RV


My communication with a progressive:
I just installed a EMS-HW50C in our fifth wheel. I took the line in from the breaker panel made it the line input to the HW50C. I installed a new piece of 3 conductor, with ground, 6 gauge cable (rated at 55 amps) from the HW50C to the breaker panel. I installed the remote indicator next to the AC controls. I left the time delay at the factory setting – ran the AC and it ran with no issues.

My question - A couple times a year we take our 4000 watt Yamaha portable generator with us to the race track. Will there be “ground issues” when the generator is powering the RV? If so is there an easy solution.

Their answer:
Just put the unit in by-pass, or tie the ground and neutral wires together.

Thomas E. Fanelli, President
Progressive Industries
414B Airport Boulevard
Morrisville, NC 27560
(919) 462-8280
fax: 919-462-6132
tfanelli@progressiveindustries.net