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Yamaha EF1000iS Field Modification

NRALIFR
Explorer
Explorer
I carry a Yamaha 1000 with us to use when we’re camped without power. Most of the time, it’s more than enough for our needs. It will power the PD4645 at full load, and will even run our microwave if I use the inverter to share the load with the generator. On the rare occasion that we need more generator the TC has a Generac 3600LP, but at 18 years old it only has about 125 hrs on it (and it had about 95 hrs on it already when I bought it in 2003) so you can see how much we use it.

One thing I’ve been meaning to change is the type of AC output receptacle it has (NEMA 5-15R) to some type of twist-lock receptacle. The straight blade plugs tended to fall out after running for long periods, and I was using a bungee cord to hold them in.

Finally got my “round tuit” for this little job, and got it done a few days ago. The panel comes off with four screws, and the old receptacle was held in with two screws. I had to use a hole saw to modify the two 5-15R openings in the panel so it would accept a NEMA L5-20R receptacle. There wasn’t enough room for a NEMA TT-30R receptacle on the panel, plus I wanted a twist-lock on the generator. Then I had to make a plate to cover what was left of the old openings. I actually hacked a piece of black plastic out of a front license plate holder that we don’t use in AR. :B



I’ve tested it with a temporary cord I made with a L5-20P on one end, and a 5-15/20R on the other and it works fine.



I also ordered one of each of these dog bones that I’ll carry with us.





:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!
11 REPLIES 11

jhilley
Explorer
Explorer
Nice change
2003 Winnebago Adventurer 38G F53 Chassis Solar Power
1999 Winnebago Brave 35C F53 Chassis Solar power
Handicap Equipped with Lift & Hospital Bed
1999 Jeep Cherokee Sport
1991 Jeep Wrangler Renegade

NRALIFR
Explorer
Explorer
First opportunity to use my Yamaha 1000 since installing the 20 amp twist-lock plug. We’re camped at a MA state park on Cape Cod with no hookups. I like the new dog bone lots better than the old hockey puck.



Ran the mwave from the inverter to heat up dinner while the Yamaha was running. If the generator wasn’t running, you’d see about 95 amps on the Trimetric while the mwave was on. With the generator running, just under 50 amps is coming out of the camper battery, the rest is being supplied by the Yamaha through the PD4645 converter/charger.



:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!

NRALIFR
Explorer
Explorer
Thanks Mex! :B

:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!

MEXICOWANDERER
Explorer
Explorer
Nice looking conversion 🙂

BFL13
Explorer II
Explorer II
Running the converter as a power supply to a battery that is being drawn down by a loaded inverter is a lot easier on it than using it to recharge the battery.

The battery voltage is lower from being loaded by the inverter so you get more amps per watt. That helps when you have a small generator. It can run more of a converter without conking out if the converter is doing power supply work instead of battery charging work.
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on Ford E350-460-7.5 Gas EFI
Photo in Profile
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas
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NRALIFR
Explorer
Explorer
No problem. I like to mention it because it was unexpected that it would work that way.

I installed the inverter specifically so it would run the mwave while we were using the Yamaha for power. Without it, if we wanted to nuke something for dinner I’d have to go outside and shut off the Yamaha, move the shore power cord (no transfer switch) and start up the Generac for 10-15 minutes.

With only one group 31 AGM battery, I figured that would be enough to nuke one meal. But, with about half of the power coming from the Yamaha by way of the battery charger, I can run the mwave twice as long as I thought. Now, the boss gets to eat, too! :W

:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!

Ron3rd
Explorer III
Explorer III
NRALIFR wrote:
The campers shore-power cord is plugged into the Yamaha, and the mwave is plugged into the inverter. The inverter is a 1500 watt PSW, so it can run the mwave on its own if it has to. But, if the Yamaha is running when I’m running the mwave on the inverter, the battery charger kicks in and will share the load with the inverter. It’s about 50/50, according to the Trimetric panel.

I wish I could take full credit for dreaming that up, but it’s just something I noticed it was doing when I tried it. :C

:):)


Got it. I didn't realize the obvious option of running the microwave off the separate inverter circuit.
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Nomad
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GordonThree
Explorer
Explorer
Nice work, it looks great.
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NRALIFR
Explorer
Explorer
The campers shore-power cord is plugged into the Yamaha, and the mwave is plugged into the inverter. The inverter is a 1500 watt PSW, so it can run the mwave on its own if it has to. But, if the Yamaha is running when I’m running the mwave on the inverter, the battery charger kicks in and will share the load with the inverter. It’s about 50/50, according to the Trimetric panel.

I wish I could take full credit for dreaming that up, but it’s just something I noticed it was doing when I tried it. :C

:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!

Ron3rd
Explorer III
Explorer III
Interesting. One question; how do you use the inverter to share the load with the Genny when you're running the microwave?
2016 6.7 CTD 2500 BIG HORN MEGA CAB
2013 Forest River 3001W Windjammer
Equilizer Hitch
Honda EU2000

"I have this plan to live forever; so far my plan is working"