It's a hybrid now... R1T charged at 5.2kw with portable generator and charging adapter

[Thedude]

If anyone is in the market for a smallish generator that fits under the tonneau the GP3500 I mentioned earlier is on sale now for $488. It showed a $50 off coupon for me which brought the price down to $438. I wanted a 30amp generator for my trailer anyway and this fits the bill at a reasonable price.

https://www.amazon.com/Generac-GP3500iO-Frame-Inverter-Generator/dp/B079KRLHBT

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[NathanM]

If anyone is in the market for a smallish generator that fits under the tonneau the GP3500 I mentioned earlier is on sale now for $488. It showed a $50 off coupon for me which brought the price down to $438. I wanted a 30amp generator for my trailer anyway and this fits the bill at a reasonable price.

https://www.amazon.com/Generac-GP3500iO-Frame-Inverter-Generator/dp/B079KRLHBT

Thanks for the heads up. I just purchased 2 plus the parallel kit.

I've been researching this for weeks and had been holding out for a dual/paralleled inverter setup that got me 10+ miles per hour of charging AND fit under the bed rails (21") or better yet the tonneau (17"). My main hold up was trying to find a 240V solution and I just couldn't find any combo of generators that could support 240V and met the maximum height requirements.

With these two units paralleled, I expect to get about 8mi per hour of charging (48A x 120V @ 80% = 4.8kW and 1.75 mi/kWh on the truck) at close to maximum load on the generator. I think that's reasonable for an overnight charge while camping in remote locations.

 

[Leonbmx]

Thanks for the heads up. I just purchased 2 plus the parallel kit.

I've been researching this for weeks and had been holding out for a dual/paralleled inverter setup that got me 10+ miles per hour of charging AND fit under the bed rails (21") or better yet the tonneau (17"). My main hold up was trying to find a 240V solution and I just couldn't find any combo of generators that could support 240V and met the maximum height requirements.

With these two units paralleled, I expect to get about 8mi per hour of charging (48A x 120V = 4.8kW and 1.75 mi/kWh on the truck) at close to maximum load on the generator. I think that's reasonable for an overnight charge while camping in remote locations.

Excited to see how they perform!

 

[jemkewl]

If anyone is in the market for a smallish generator that fits under the tonneau the GP3500 I mentioned earlier is on sale now for $488. It showed a $50 off coupon for me which brought the price down to $438. I wanted a 30amp generator for my trailer anyway and this fits the bill at a reasonable price.

https://www.amazon.com/Generac-GP3500iO-Frame-Inverter-Generator/dp/B079KRLHBT

Know the THD? Just curious since these do not appear to be inverter generators.

 

[Thedude]

Know the THD? Just curious since these do not appear to be inverter generators.

It is an inverter generator, paperwork claims less than 3% THD.

 

[NY_Rob]

TLDR but after reading this thread I believe this generator should work.
https://www.costco.com/firman-11,4009200w-gasoline-powered-generator-with-remote-start.product.4000022974.html

Could someone please check my work? I’m planning on bringing a truck home to Alaska. Out of the entire drive from Illinois there’s one freaking stretch without a public fast charger.

Sometimes you need to put in the effort and read the whole thread.. you want an inverter to charge the Rivian, the garbage AC waveform put out by those old style generators could easily damage the Rivian's sensitive electronics that were designed to run off a clean 60hz sine wave AC supply.

 

[jemkewl]

Thanks for the heads up. I just purchased 2 plus the parallel kit.

I've been researching this for weeks and had been holding out for a dual/paralleled inverter setup that got me 10+ miles per hour of charging AND fit under the bed rails (21") or better yet the tonneau (17"). My main hold up was trying to find a 240V solution and I just couldn't find any combo of generators that could support 240V and met the maximum height requirements.

With these two units paralleled, I expect to get about 8mi per hour of charging (48A x 120V = 4.8kW and 1.75 mi/kWh on the truck) at close to maximum load on the generator. I think that's reasonable for an overnight charge while camping in remote locations.

Will look forward to your results.
Is the math that 3000 watts x 90% = 2700 watts
x 2 for parallel = 5400 watts at 240v?

 

[Thedude]

Will look forward to your results.
Is the math that 3000 watts x 90% = 2700 watts
x 2 for parallel = 5400 watts at 240v?

No, you can either have double the watts (6000) at 120v or 3000 watts at double the voltage (240v), depending on how the parallel kit combines them. Most smaller generator parallel kits are the type to double the wattage at the same voltage since they are designed for use with 120v systems. The Generac parallel kit for this generator will provide up to 50amp at 120v for 6000 watts output. I’m curious how the Rivian portable charger will handle that since it is a 32amp max but at 240v.

 

[joshtish]

No, you can either have double the watts (6000) at 120v or 3000 watts at double the voltage (240v), depending on how the parallel kit combines them. Most smaller generator parallel kits are the type to double the wattage at the same voltage since they are designed for use with 120v systems. The Generac parallel kit for this generator will provide up to 50amp at 120v for 6000 watts output. I’m curious how the Rivian portable charger will handle that since it is a 32amp max but at 240v.

Odds are one would need a different EVSE to work with this setup. I suspect this setup will lead to disappointment.

 

[Thedude]

Odds are one would need a different EVSE to work with this setup. I suspect this setup will lead to disappointment.

https://www.rivianforums.com/forum/threads/tt—30p-120v-to-14-50p-240v-adapter.5325/

This thread shows the truck will charge with a TT-30 to 14-50 adapter at 24amp/120v rates. The EVSE is obviously capable of utilizing 120v over the 14-50 plug in the right circumstances.

 

[NathanM]

Thanks for the heads up. I just purchased 2 plus the parallel kit.

I've been researching this for weeks and had been holding out for a dual/paralleled inverter setup that got me 10+ miles per hour of charging AND fit under the bed rails (21") or better yet the tonneau (17"). My main hold up was trying to find a 240V solution and I just couldn't find any combo of generators that could support 240V and met the maximum height requirements.

With these two units paralleled, I expect to get about 8mi per hour of charging (48A x 120V @ 80% = 4.8kW and 1.75 mi/kWh on the truck) at close to maximum load on the generator. I think that's reasonable for an overnight charge while camping in remote locations.

Thanks @Thedude for pointing out that the portable charger maxes out at 32A, I wasn't aware. So I guess I need to revise my expectations from above. Paralleling the two inverter generators should give me 6000 running watts and the parallel kit includes a 50A outlet. But if the portable charger maxes out at 32A I guess I don't have to worry about overloading the generator (my previous 80% adjustment). So I guess, at best, it would now be 6.72mi per hr of charge (32A x 120V = 3.84kW x 1.75mi/kWh = 6.72mi per hr of charging).

I wanted 10, but I guess 5-7 will have to do. the units fitting under tonneau is probably worth it. Not a total waste if this whole idea doesn't work out though...I will still use these to backfeed my house during a power outage and they're also still great for camping in general.

 

[Thedude]

You can get a different parallel kit that gives will give a 240v output. That would give you 25 amps at 240v for a 6kwh charge rate and maximize the portable EVSE’s capability.

 

[Leonbmx]

You can get a different parallel kit that gives will give a 240v output. That would give you 25 amps at 240v for a 6kwh charge rate and maximize the portable EVSE’s capability.

So something like this?

https://journeymanpro.com/products/...-30-tt-30-rv-ready-portable-converter-adapter

 

[Thedude]

So something like this?

https://journeymanpro.com/products/...-30-tt-30-rv-ready-portable-converter-adapter

I don’t know. That description says 250v but the pictures of the parallel itself say 120v only.

 

[Thedude]

Looking into this more I may just be completely wrong about being able to run them as a 240v combined output. I could’ve sworn I’ve done it before but all the kits advertise as just providing a 50amp 120v output on the 14-50 plug.

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