120V Inverter Teardown

[fhteagle]

How would you ensure phase sync with two in parallel?

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[Dark-Fx]

How would you ensure phase sync with two in parallel?

Speculation here but they might support talking with eachother and having a master/secondary type of arrangement like inverter generators do.

 

[fhteagle]

Wonder if it would just be easier to go HVDC -> 48+VDC -> off the shelf inverter charger like a Growatt or EG4.

Here's a 65A rated bidirectional DC/DC converter, for example: https://www.vicorpower.com/industries-and-innovations/automotive/hv-battery-conversion

 

[Dark-Fx]

Wonder if it would just be easier to go HVDC -> 48+VDC -> off the shelf inverter charger like a Growatt or EG4.

Here's a 65A rated bidirectional DC/DC converter, for example: https://www.vicorpower.com/industries-and-innovations/automotive/hv-battery-conversion

That's a good thought. I'm guessing the HV input line is just directly wired from the battery, would be easy to gain access to it from the bottom of the truck and running new wiring to somewhere else in the vehicle instead of putting all that heat into the cab.

 

[csharp]

I'm glad people like you exist. 99% of this thread is jibberish to me. I'll just wait for the How To thread to come out saying how I can switch my inverter.

 

[Dark-Fx]

More info about the unit and other cars it's used on. Apparently there is a 220V version also...

https://openinverter.org/forum/viewtopic.php?t=2693

Thanks for that link. From the lineup it's still indicated that the 220V version is 1500W. Was hoping for the situation where it could double the output power like some other vehicles but looks like no such luck here.

https://www.toyota-industries.com/news/items/jsae_yok18_panel_05_e.pdf

 

[fhteagle]

That's a good thought.

I mean there will definitely be packaging, safety, tie down, volume issues with the 48V plan, but... If you don't like it, want to sell the truck, etc, it should be easy to revert to stock if you did it right. Then the components could go on something else, like a camper trailer or something.

As to ~240V, didn't someone sell a Chademo to home kit for awhile? Mitsu or Nissan or third party maybe... Wonder if the inverters out of one of those would work....

 

[Donald Stanfield]

This is another trial run for his upcoming YouTube channel!

I hope when he does he just drops his videos without comment like total clickbait garbage. I love it when wannabe YouTube streamers do that.

 

[COdogman]

I hope when he does he just drops his videos without comment like total clickbait garbage. I love it when wannabe YouTube streamers do that.

I think to set himself apart from the others he should go the other direction and post a full transcript of every word of the video along with it, including any advertisements that appear.

 

[Dark-Fx]

I hope when he does he just drops his videos without comment like total clickbait garbage. I love it when wannabe YouTube streamers do that.

You won't believe what I discovered when I risked life and limb taking part of my R1T apart!

 

[onebadmofo]

For those that don't know the US "version" of 240v is drastically different from EU, that's why there's no magical switch inside inverter.

We have two 120v phases working at 180° from each other with common neutral/ground whereas EU simply has a single phase working at 230v

 

[Dark-Fx]

For those that don't know the US "version" of 240v is drastically different from EU, that's why there's no magical switch inside inverter.

We have two 120v phases working at 180° from each other with common neutral/ground whereas EU simply has a single phase working at 230v

US is still single phase. Transformers are just center tapped here, splitting it into equal halves.

 

[jwardell]

More info about the unit and other cars it's used on. Apparently there is a 220V version also...

https://openinverter.org/forum/viewtopic.php?t=2693

Very interesting he mentions in the video he claims Rivian is running 3 in parallel, and he plans to run 2 in parallel. Not only do I wonder what is needed to run them in parallel, but also I wonder where he got that info, and perhaps was Rivian originally planning to have 3 for more power?

Suppose you could stack two 120s instead of parallel, you might actually be able to do 240v. But it all depends on how they can be operated in parallel. I doubt they auto sync when the outputs are simply connected.

I wish there were some part numbers and documentation for these. If they are used in Prius, perhaps there is more info out there, better yet CAN message commands.

 

[Acoustic71]

Back when I was doing automotive controls, we worked hot on 677VDC equipment occasionally. I avoided doing it as much as possible, but it simply can't be avoided if you are trying to diagnose why a piece of equipment at those voltages wasn't working.

I can still hear my Aviation Electronics instructor at the NAS Memphis (Millington) when someone did something stupid, "Who's arc welding one of my test stations!" , "Who's arc welding my test stations!"

It wasn't hard to find the culprit. They were usually halfway across the room, having been slammed against the wall. It was a harsh but effective way to teach someone the dangers of working on live equipment.

 

[Dark-Fx]

Very interesting he mentions in the video he claims Rivian is running 3 in parallel, and he plans to run 2 in parallel. Not only do I wonder what is needed to run them in parallel, but also I wonder where he got that info, and perhaps was Rivian originally planning to have 3 for more power?

Suppose you could stack two 120s instead of parallel, you might actually be able to do 240v. But it all depends on how they can be operated in parallel. I doubt they auto sync when the outputs are simply connected.

I wish there were some part numbers and documentation for these. If they are used in Prius, perhaps there is more info out there, better yet CAN message commands.

I think it was just some bad information about how Rivian is using them to be honest. There's only a single inverter in the Rivian.

Been looking for a datasheet from toyota on it but I haven't had much luck.

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