frontpage Posted by MinhTrinh • Apr 10, 2025
Apr 10, 2025 5:04 AM
Item 1 of 1
frontpage Posted by MinhTrinh • Apr 10, 2025
Apr 10, 2025 5:04 AM
EF ECOFLOW DELTA 2 Max Power Station Extra Battery
+ Free Shipping$759
$1,399
45% offAmazon
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home depot is selling the delta pro ultra 6.144 kwh batteries for $1599. (even less if you use a home depot coupon, like $15 off $100, or $75 off $500, etc.) that battery has three times the capacity as this one (6kwh vs. 2kwh), but three of these at $759 totals $2277, vs. $1599 for the same capacity of the delta pro ultra battery. of course, i realize that the delta pro ultra battery does not work with the delta 2 max, but the battery is still overpriced for the capacity you get.
which is why killercut was suggesting you can buy non-ecoflow batteries to expand the capacity of your delta 2 max. for $759, you can almost buy a 48 volt server rack battery, which is 5.12 kwh, vs. this one, which is only a measly 2 kwh.
so, you are paying nearly 2 1/2 times the price per watt, compared to a budget brand server rack battery, just to add a couple kwh of battery storage.
i get that it is nice to have the matching ecoflow branded expansion battery, and it seamlessly integrates and communicates with the ecoflow power stations, but imo, it's still not worth it for this price.
if it were me (i realize everyone is different and may not agree), but i would rather take the $759 and buy a bluetti elite 200 v2, which i think is an overall better power station than the delta 2 max. you still get your 2 kwh of battery capacity, but you also get an extremely efficient (and quiet) 2600-2800+ watt inverter, in a nice compact form factor, that can allow you to take in up to 1000w more solar.
i just don't think this deal is all that great. a good deal on this battery would be more like 500 or 600 tops.
Forget the bluetti, go for the delta 3 pro if you need more power. Refurbished for $2000 on ebay or get the 2 pack from costco and return rebuy when the price drops again. It has 240v which makes it a lot more useful. Also has higher voltage solar input so you can connect some serious solar arrays.
ie. it charges battery 24/7 off A/C and has a pass-through A/C outlet
but then switches to battery when loss of A/C detected and keeps A/C outlet going
?
with the alternator charger, you don't even necessarily have to have your truck idling using the vehicle's battery. you could just throw any spare 12v or 24v lifepo4 battery in the truck with you, and keep your power station charged up from the external battery, using the alternator charger or simply an o-ring to xt60i cable like this one:
https://www.amazon.com/dp/B0DT6ZPWFS
like i stated earlier, if it's a 12v battery, with this cable you are only going to be able to feed the power station a constant 180 watts or so (12 volts times 15 A max input on the ecoflow is 180). but since the delta 2 max has two dc/solar inputs, you could use two cables hooked up to the same 12v battery and double that to around 360+ watts input into the power station.
just make sure the spare lifepo4 battery is charged full before the show, and throw it in the truck with you. that's all you need to keep your ecoflow going without the noise of idling the truck or a generator.
it would be helpful to use a watt meter, like a kill-a-watt, to measure exactly how much energy the heat press uses for the duration of a show, and size your external battery (plus the 2kwh you get with the delta 2 max) accordingly.
if your delta 2 max runs the heat press for most of the show, and dies near the end, then you will only need a small inexpensive lifepo4 battery to keep it going until the end.
but yes, if you want indefinite run time, and your heat press uses less than a constant 800w, you should be able to keep the delta 2 max running indefinitely with the truck idling, as long as it doesn't overheat, and your truck alternator has no problem supplying the 800 watts at idle. i would imagine you would only have to idle the truck part of the time, to keep the power station charged up, but not the whole time.
ie. it charges battery 24/7 off A/C and has a pass-through A/C outlet
but then switches to battery when loss of A/C detected and keeps A/C outlet going
?
anyway, a small and inexpensive ecoflow river 3 plus can be used as a ups, and it can be fed a consistent 220w into the solar input, from an external battery or battery bank.
https://www.youtube.com/watch?v=aXQEMOY
if you require something larger and more powerful, just get a larger power station, like the delta 3 plus, use it as a ups, and keep it charged up and fed via the solar input from an external battery.
obviously you will have to come up with a way to keep the external batteries which are feeding your power station charged. you could charge them with solar, or with a standard battery charger plugged into the wall or power station, or use ecoflow's alternator charger.
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-Can I reverse charge a LiFePO4 battery with the alternator charger and charge it from the Delta 2 Max power station?
-Say I have a fridge/freezer attached to a DeltaMAX2+DeltaMAX2 expansion batt, can I then connect an additional LiFePO4 batt via the alternator charger to expand capacity to the extra expansion battery port?
The delta 2 isn't enough to run the heat press for the whole show, it's literally only enough to bring the heat press up to temp, which is about 10-15 minutes and then it's dead, so I'll definitely need more than just another small battery. My only hope is the alternator charger, but then I may run into heat issues. I'll probably put a fan on it to help.
I ordered a refurbished alternator charger from the ecoflow eBay store this morning.
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but i own a chevy volt and a 1500 watt inverter so i think i'll be covered...
well that saved me a few thousand i think lol