Thought this might be intriguing to some Interstate owners. Preemptive caveat, I am in no way affiliated with Ecoflow. This is just my independent testing of the device. I'm also not an expert on electrical matters.
A few months ago I purchased an Ecoflow Delta Max
(Delta Pro was sold out) "solar generator" (not the biggest fan of this descriptor but not sure what else to call it / battery generator?). Primary reasons for buying were 1/ having backup power in case of an emergency (ie earthquake or California's PG&E sometimes shuts off power periodically during wildfire season preemptively) and 2/ also using it to power my entire Interstate while boondocking, especially if I'm in shaded areas where solar doesn't do a great job topping up the batteries. I also bought their portable suitcase 160W solar panel, allowing you to charge the generator via 1/ 12V
car adapter 2/ wall AC plug or 3/ solar.
HIGH LEVEL SPECS ON ECOFLOW DELTA MAX (a lot more on website)
- 2016 Watt Hours Capacity
- 6 20 Amp AC output plugs: 2400W total (Surge 5000W)
- 2 USB-A, 2 USB-A Fast Charge, 2 USB-C ports
- 2 DC ports, 12.6V, 3A, 38W Max per port
The challenge with using the Ecoflow Delta Max (or something like the Goal Zero YETI) with the Interstate is twofold. 1/ where/how do you plug it in? and 2/ what can you NOT run with this device. I also had the question of "how long does this really power the entire rig?"
WHERE DO YOU PLUG IT IN?
I wanted the ability to keep the Ecoflow INSIDE the rig so it wouldn't be exposed to the elements but also so I could plug in various other devices into the Ecoflow (ie cell phones) and charge them at night. In order to do this, I had my local airstream service shop install a 30amp male plug in the trunk area (driver side on the panel/wall that encases the water heater. see pics). This required their technician to add a new power cord (Romex) into the transfer switch with ONE BIG WARNING
. *do NOT plug into shore power OR turn on the generator if the Ecoflow is plugged into this interior 30amp plug as it could overload the system*
Because I have the Delta Max (which does NOT have a 30amp plug on it), I had to use my 15amp > 30amp dog bone adapter. I actually opted to use this Camco 15A > 30A plug adapter
and plug that into the end of my 25' shore power cable. I plug the male end into the back of the Ecoflow 20A AC plugs and the female end into the interior Furrion 30Amp new plug.
WHAT DOES THIS ACTUALLY POWER & WHAT CAN'T YOU POWER?
Again, I'm just a novice at all this so I may be getting some things wrong but here's what I understand. The Ecoflow Delta Max has 2016 Watt Hour Capacity.
This caused me to dive deep into our manuals to see the wattage of various components / appliances. I have been used to understanding how many Amps something uses but knowing the wattage is helpful here too. I wanted to primarily keep our batteries charged but also provide power for the other smaller things (fridge, lights, water pump, outlets) just like when you plug into shore power.
Because I believe the max amp output of the Delta Max is 20amps (and since I'm using the 15A > 30A power adapters), that rules out the usage of the A/C (12-18A) and the microwave (8-13A) in my rig. So rule #1 was "don't turn on the microwave or A/C while having the Ecoflow Delta Max plugged in"
. side note: I believe our Microwave uses 950Watts which MAY work on the Ecoflow but I didn't want to test the limits.
REAL WORLD TEST RESULTS / HOW IT WORKED
We went to Yosemite for Thanksgiving, brought the Ecoflow and tested it in the shady Upper Pines Campground where temperatures got down into the mid 30s at night + upper 60s in the day. here's what I learned:
When I first plugged the Ecoflow into the Interstate, I switched the Precision Control System power mgmt screen to 20Amps (instead of the standard 30A). I noticed the Ecoflow registered about 330 Watts (said it had 7 hours of charge left) because it appeared to immediately start charging batteries with converter/charger. After about 10 minutes the wattage decreased to about 250 Watts. Later in the night the Ecoflow said it was using only 120 watts while plugged in (maybe the batteries were entirely topped up).
After the batteries seemed to be fully charged I started playing around with various appliances / features + recording how much wattage things used. a few of them are below (the baseline fluctuated from time to time).
- BASELINE WATTAGE OF INTERSTATE GL (with propane switch on; Victron Bluetooth Solar Dongle; Battery Minder; fridge on; no lights, whatever other parasitic loads): 120-230 Watts
- WITH BATTERY CHARGER RUNNING: +100 Watts (330 Watts total)
- WATER PUMP ON: didn't seem to add any Wattage
- WATER PUMP RUNNING: +100 Watts
- TANK HEATERS (& PROPANE SWITCH): +120 Watts (330-360W total)
- BATTERY HEATER: +32 Watts (262 Watts total)
- ALL INTERIOR LIGHTS ON: +157 Watts (387 Watts Total)
- HOT WATER GAS/TANK HEATER ON: +80 Watts
Overall, the Ecoflow went from 100% charge down to 35% charge in the 2.5 days that we were there. I didn't leave it plugged in all day. I plugged it in after the sun went down and by the time we went to bed, unplugged it again b/c the batteries (and our phones, GoPros) were charged.
Maybe this is all overkill and I should either 1/ use the Onan LP generator more (Yosemite restricts which hours you can use it) or 2/ have just installed more lithium batteries in the AI (I have 2 Battleborn 100Ah batteries) but in the event we do some extended boondocking, it might prove useful. I'd suspect in a pinch, it would help extend the time you could keep the tank heaters on (which I've heard drain the batteries in 4-5 hours). While I like the Ecoflow Delta Max (would have preferred the Delta Pro), I'm still very early in testing it to see how much benefit I truly get in boondocking situations vs. harnessing solar power better/more. Just thought I'd share in case people find it helpful.
p.s. here are some of the items we sometimes have in our AI + what I believe their wattage is
- BREVILLE TOASTER OVEN: +1800 Watts (this would last 1 hr on the Ecoflow)
- LAPTOP: 87 Watts
- Dehumidifier: 40 Watts
- iPhone: 5 Watts
- Nintendo Switch: 39 Watts
- Ninja Blender: 700 Watts
- Ceramic Heater: 750 Watts (Low) / 1500 Watts (High)