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popular Posted by David_David • Jun 15, 2025
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popular Posted by David_David • Jun 15, 2025

EcoFlow DELTA 3 Extra Battery - $449.99

$450

$600

25% off
HSN
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Lowest price ever seen for THIS product - Ecoflow delta 3 extra battery, plug and play seamless add on for all EF delta 3 power stations.
Compare at 599.99 from Ecoflow direct.
Requires main EF power station and includes the right angle extra battery port cable.

Not to be confused with a DIY external battery.

https://www.hsn.com/products/ecof...y/23452121
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About the Poster
Lowest price ever seen for THIS product - Ecoflow delta 3 extra battery, plug and play seamless add on for all EF delta 3 power stations.
Compare at 599.99 from Ecoflow direct.
Requires main EF power station and includes the right angle extra battery port cable.

Not to be confused with a DIY external battery.

https://www.hsn.com/products/ecof...y/23452121

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7 Comments

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Jun 15, 2025
851 Posts
Joined Feb 2012
Jun 15, 2025
DaShadow577
Jun 15, 2025
851 Posts
Does it work with delta 2? Any benefits over delta 2 extra battery?
Original Poster
Pro
Jun 15, 2025
58 Posts
Joined Mar 2025
Jun 15, 2025
David_David
Jun 15, 2025
Original Poster
Pro
58 Posts
Quote from DaShadow577 :
Does it work with delta 2? Any benefits over delta 2 extra battery?
yes D3 EB works with D2 (not D2Max) but other than size, and the right angle connection cable, D2 EB can generally be had for less $ and physical/style match with D2...
1
Jun 16, 2025
147 Posts
Joined Mar 2018
Jun 16, 2025
Plutomania
Jun 16, 2025
147 Posts
Yes, it's the lowest I've seen too, but it's still way more expensive per watt than a typical LiFePO4 battery. EcoFlow is making us pay 3 times the market rate. One can buy a 48V 50Ah battery for the same money, but it will not charge from the EcoFlow.
Jun 16, 2025
851 Posts
Joined Feb 2012
Jun 16, 2025
DaShadow577
Jun 16, 2025
851 Posts
Quote from Plutomania :
Yes, it's the lowest I've seen too, but it's still way more expensive per watt than a typical LiFePO4 battery. EcoFlow is making us pay 3 times the market rate. One can buy a 48V 50Ah battery for the same money, but it will not charge from the EcoFlow.
Any links to make a eternal battery DIY? That you could recharge off of?
Jun 16, 2025
114 Posts
Joined Oct 2021
Jun 16, 2025
SmartSeed8854
Jun 16, 2025
114 Posts
Quote from DaShadow577 :
Any links to make a eternal battery DIY? That you could recharge off of?

You can use the Ecoflow Alternator. https://youtu.be/ReGWks3ENc4
Jun 16, 2025
269 Posts
Joined Sep 2014
Jun 16, 2025
Comcastrated
Jun 16, 2025
269 Posts
Quote from DaShadow577 :
Any links to make a eternal battery DIY? That you could recharge off of?
It''s not complicated. I'm using a lifepo4 battery, a lifepo4 battery charger, and a m8 to xt60i cable from the battery to the ecoflow solar input. The higher the voltage of the battery, the faster it charges the ecoflow. I'm using a 12V battery, which is good for my needs, but charges the ecoflow at only 200w. I believe a 48V would max out at 500w input. There are a million videos on youtube about all this.
Last Saturday
5,589 Posts
Joined Dec 2004
Last Saturday
Caleo
Last Saturday
5,589 Posts
Quote from Comcastrated :
It''s not complicated. I'm using a lifepo4 battery, a lifepo4 battery charger, and a m8 to xt60i cable from the battery to the ecoflow solar input. The higher the voltage of the battery, the faster it charges the ecoflow. I'm using a 12V battery, which is good for my needs, but charges the ecoflow at only 200w. I believe a 48V would max out at 500w input. There are a million videos on youtube about all this.
A 48V should max out the 500W input, yes, provided you have the XT60i cable. The 'i' part is important, it signifies that it has the extra pin that the Ecoflow uses as a green light to pull 15A, instead of just 8A, which is meant to protect fuses when using with cigarette sockets in cars (typically 100-120W).

Nice thing about the D3 Plus is that it has 2x 500W solar inputs, so if you want to run it off one 48V battery you can pretty easily, with up to around 1000W input from it (which is usually no sweat for a 48V battery setup).
Basically just need a 'y' adapter', ideally some 30A+ (over)rated wire, and some fuses for safety. There is some amount of loss doing this though, since it's being done via the D3P's MPPT charge controller(s). Not a terrible loss (maybe up to 10%), but I think their own proprietary batteries don't lose as much.

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