Charging a Rivian with an Ecoflow Delta Pro

[Redmond Chad]

Yup. I got the Ecoflows mostly as a whole-house backup in case of outages. They sit next to the R1S, so I can charge them from the car while they power the house. When the car gets low, I can take it to a charging station. Heck, I can take the Ecoflows with me and charge them from a charging station too.

We have a small trailer that takes 30A at 120V, so they can power that for quite a while too.

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[Riv3D]

Would it be a bad idea to get an Eco flow (and some extra batteries) + 6 400 watt panels just to top off the car with about 12 kwh/day? My thought process here is it would be cheaper than to get a full system installed (I would install panels myself on the roof of my shed)

 

[Thedude]

Would it be a bad idea to get an Eco flow (and some extra batteries) + 6 400 watt panels just to top off the car with about 12 kwh/day? My thought process here is it would be cheaper than to get a full system installed (I would install panels myself on the roof of my shed)

If you’re building it yourself and have some space in the shed you can do it a lot cheaper than for what an ecoflow and extra batteries will cost. With fixed panels at about 40-50% of their rating on a daily basis due to angle of the sun and losses in the conversion of DC storage to AC charging back to DC storage you’ll likely need more than 2400 watts of panels.

 

[Riv3D]

If you’re building it yourself and have some space in the shed you can do it a lot cheaper than for what an ecoflow and extra batteries will cost. With fixed panels at about 40-50% of their rating on a daily basis due to angle of the sun and losses in the conversion of DC storage to AC charging back to DC storage you’ll likely need more than 2400 watts of panels.

How would it come out to be cheaper?

 

[DRJ564]

I installed solar but if I were looking at these types of generators I would definitely build my own.

 

[good2go]

If you’re building it yourself and have some space in the shed you can do it a lot cheaper than for what an ecoflow and extra batteries will cost. With fixed panels at about 40-50% of their rating on a daily basis due to angle of the sun and losses in the conversion of DC storage to AC charging back to DC storage you’ll likely need more than 2400 watts of panels.

You will still need a bunch of battery storage, unless you are a vampire. Most people use there vehicle during the day when the sun is up. You will need to capture the sun during the day and charge the vehicle at night.

 

[Thedude]

How would it come out to be cheaper?

The Ecoflow is designed to prioritize portability and ease of use which comes at a cost. In a shed you can run a much larger but cheaper battery array with a separate charge controller and inverter.

You will still need a bunch of battery storage, unless you are a vampire. Most people use there vehicle during the day when the sun is up. You will need to capture the sun during the day and charge the vehicle at night.

Of course, never meant to sound like you don’t need battery storage.

 

[Michal]

Does the Ecoflow Delta Pro fit under the tonneau cover?

 

[theonetruestripes]

Um, whats the use case for this?

In whole? Not a lot. Like sure carrying 100lbs of extra battery for a few miles of range doesn’t make a lot of sense.

However if you were already carrying the battery for other uses, carrying the cable and knowing how to use it to get those few miles of range might be useful, or of course...

Having that plug for a 30 amp plug at an RV park might just be enough to get you home or get you charged some mostly overnight.

Indeed, that is the best use case for this knowledge. Overnight at an RV park that is a considerable amount of range. Also the “special” 30A cable is small and light.

have to use a neutral to ground bonding plug on any generator or inverter to get it to work on any EV charger. The charger needs to see continuity between neutral and ground

...and of corse if you have a genny with a 30A out (like I do) this might be useful knowledge as well. In my case I would need to have a power outage long enough that I need to go get more gas enough times that I’ve used up all the range on my R1S, and while it is the small battery R1S that is still a whole lot of trips to the gas station 4 miles away...

Alternately I suppose I could be faced with the problem “I bought more gas then I needed for the last outage, and the generator doesn’t like to burn it if it has been sitting long enough for the water to start separating out (a problem with gravity fed tanks)...so I’m going to have to get rid of it somehow, may as well get a charge out of it!"

 

[MacO512]

Another use case is a large RV with a lot of solar. Or any cabin, off-grid, etc setup with a large solar setup. When building it instead of hardwiring the solar to fixed batteries/inverter could buy an ecoflow. Then use the ecoflow to add some range to a Rivian or power the RV/etc.

 

[CharonPDX]

Reviving an old thread - I have a pair of EcoFlow Delta Pro plus two extra batteries to help with home backup when I'm home, and as mobile power for my travel trailer when camping off-grid. (Similar setup to Redmond Chad) and recently had the opportunity to use it to rescue my dad, who accidentally ran his Kia out of charge.

The home setup:

Got a Tesla Powerwall 2 installed with solar panels in 2021, it runs "essential loads" in the smaller breaker box. It recently dropped below the warranty replacement threshold, so got it warranty replaced, and they replaced it with a Powerwall 3. The two Delta Pro plus two extra batteries are on the floor, plugged into the EcoFlow "Smart Home Panel" above them feeding 8 "non-essential" circuits. I figure in a power outage that we're home, it would be nice to have lights and outlets in some rooms the Powerwall doesn't feed; but if we're gone on a road trip with the EcoFlows, it isn't a big deal to have those circuits unpowered. The Powerwall runs things like the refrigerators, furnace, one outlets-circuit to run internet router and home office, and garage door openers.

Here was the rescue, using the 240V combiner Chad showed, and a Tesla mobile cord (because it works fine with a floating ground) plus Lectron J1772 adapter.

For @Michal - yes, they fit under the tonneau. I only brought the main Deltas, not the extra batteries, because I knew they would have more than enough juice to get him home.

Yes, he made it only partway up the off-ramp before coming to a halt. He misread the distance he needed to go that day, and thought he would be able to charge at one of his stops, but the L2 was down. He made it to about a mile and a half from his house.

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