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Review EcoFlow Delta Max

Review EcoFlow Delta Max – The Delta Max is basically a bigger version of the Delta 1300, with App control, extra batteries (which I didn’t test), and a few refinements like a manual “Quick Charge” switch on the unit itself. I actually like it a lot. If I was comparing the Delta 1300 and the Delta Max I’d be looking carefully at the price per kWh but I’d be generally inclined to get the Delta Max if I had to have just one power station.

Review EcoFlow Delta Max

I really, really like the new features on the Delta Pro (which I also didn’t test) but the 100 lb weight makes it too much of a fixed-in-place unit for my overall needs: camping, emergencies, running power tools in the back yard or around my car, etc.

EcoFlow Delta Max

The MAIN reason I like the Delta Max is it’s powerful enough to do whatever I want to do with it for a lot longer than my Delta 1300 and I can still move it around fairly easily. For me, my main criteria for how useful a power station will be for me is how long it will power my refrigerator.

Delta Max Specifications

Delta MaxSpecifications
Capacity2016 Wh Expand up to 6028 Wh
With 2 x Extra Batteries
AC Output6 Outlets, 2400W total
Power up to 3400 W devices
with X-Boost
AC InputFull recharge in 1.8 hrs
at 1800 W
Solar Input800 W Max (11-100 V)
Battery ChemistryNCM
Weight48 lbs

I’ve got an old GE Refrigerator FE GSL25IFRF BS. When the compressor OFF it didn’t really draw any power (unless the door light was on). With Compressor ON it drew: 111-152 Watts but that only occurred about 15 minutes per hour. It was averaging about 80-85 Watts per hour.

The 2016Wh Delta Max powered this refrigerator for about 19 hours on a single charge with no solar or grid input. For comparison, my Delta 1300 would run the fridge for about 10 hours. Charging the Delta Max from 0% nominal to %80 took about 90 minutes. Topping up to 100% took another 110 minutes.
Charging the Delta Pro 0% to 100% consumed 2,360 Wh of Grid power according to my Kill-O-Watt meter.

Review Delta Max

Delta Max Capacity is rated as 2,018 Wh. Discharging the Delta Max 100% to 0% output 1,820 Wh according to my Kill-O-Watt meter. So, output-efficiency, the energy used to divide by the rated capacity is 1820Wh/2018Wh ~= 90.2% and round-trip-efficiency on the Delta Max is 1820Wh/2360h ~= 77.1%
I have to say, I haven’t had time to run this test again with the newest Firmware. I’m hoping I can do that this afternoon.

Using four 110W Ecoflow Solar Panels in series, with panels set at ~45° inclination facing south –
On a sunny day with a slight haze, the Maximum Wattage from the panels at Solar Noon was: 371 Watts.
I was able to charge the Delta Pro from 0% nominal to 100% using this solar setup in about six hours.
With this setup, I was able to run this refrigerator without grid power for three days before I concluded the test.

I figure, if a blackout occurred during several days with cloudy skies, especially in winter with longer nights and shorter days, the Delta Max would probably run out of juice in less than three days running my fridge.

Delta Max

I really WANT to get a Delta Pro and Smart Home Panel during the KS Launch – for the automatic UPS service, the LiFePhos4 battery pack, and for the Bluetooth App Connection. However, when I detail my real needs for power stations, just supplementing what I now have with a single Extra Battery for the Delta Max might be enough.

A 2015Wh Extra battery, plus my Delta Max would probably power my fridge for around 6 days – maybe indefinitely if I add more solar panels. The Delta Max has NCM batteries with a much shorter life cycle than the LFP batteries in the Delta Pro. So, I would NOT keep a Delta Max setup plugged into grid power all the time as an Uninterruptable Power Supply. Since my computers are all laptops, I don’t really need UPS.

I still love my Delta 1300. At 31 lbs, it’s about the perfect size for me for car camping. I did take the Delta Max for two overnight trips in my van and I found the size and 50 lb weight to be a burden. I do think the capacity of the Delta Max would be perfect for an RV trip, with more than three people, with more equipment, for more than a single night.

We had a blackout recently and I found it very convenient to have multiple power stations throughout my condo: Delta Max running the Refrigerator and incidental kitchen appliances. Delta 1300 powering my router lights, computers, etc in my living-dining room area. R600 Max running bedroom lights, BiPap Machine, etc. It was a bit of a shlep to position everything, layout folding solar panels and layout MC4 cables.

EcoFlow DELTA Max

EcoFlow DELTA Max
EcoFlow DELTA Max
Price: $2,099.00 $1,699.00
The EcoFlow DELTA Max is the next leap in portable power technology, offering you power security and independence, wherever you are.

Final Words

Review EcoFlow Delta Max – However, comparing that emergency effort with the effort and expense of installing a fixed Solar Array, new solar power lines, a Smart Home Panel, etc for the qualitatively better Delta Pro system – I was very happy with my slapdash emergency setup. Even happier to know I could quickly pack EVERYTHING up in my van and my girlfriend’s van and we could just bug out if needed.

It looks like it’s going to be a bad season for fire, drought, earthquakes, and the list goes on. So “Bug-Out-ability” has risen quite high in my list of priorities. YMMV.

Credit: Christopher Loye

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