EF ECOFLOWDelta 2 Smart Extra Battery, 1024Wh LiFePO4 Expansion Battery for Power Station DELTA2

The Extra Battery was scheduled for delivery between 3-31-25 & 4-3-25, it arrived on 3-21.Today I decided to charge it, I connected the EB to my Ecoflow Delta 2 Power Station with cable provided. The Delta 2 was 97% charged and the EB was 30% charged. I started at 10:35am.I started charging with my ALP LP Generator at 800 watts ( actual ~ 780w ) after 30 minutes the EB was charged to 60%, my generator needed to run a bit and I didn't want to waste any more propane so I switched to solar charging.I dragged out my 220w Ecoflow Bifacial panel and a 50' solar cable. That sucker is not light, this is the original SP and you are supposed to use the case to hold it up ( which is very nice and well built ) but I do not use the case, instead I use 2 folding chairs and I align it to the sun with a small can of Campbell's chicken soup ( you place it on the solar panel and adjust until there is no shadow ).Started at 11:35am 60% charged, at 12:35pm it was 77% charged-average solar input was 175w ( max 190w, min 160w ) at 1:30pm the EB was charged to 90% and the Delta 2 remained at 97%. The charging of the EB was set to stop at 90% and it did just that. However after I disconnected the solar cable from power station I noticed the Delta 2 battery sensed the EB was at 90% and the Delta 2 was at 97% and it started to transfer energy to the EB to equalize the charge between the two. I disconnected the cable between units and shut them both off.Observation:The Delta 2 transferred power to the EB as follows: If the solar input was 190w it transferred 180W to the EB, no matter the input it sent 10w less to the EB.Caution.The EB DOES NOT have any output ports and just one bi-directional port on the side, you MUST have a Delta 2 ( it is compatible with 2 other Ecoflow power stations ) to CHARGE IT.You cannot use the EB by itself for any purpose except as a very expensive paper weight.I am happy with my purchase I should be able to run each of my refrigerators about 24 hours with a Delta 2 & EB.

Bought the extra battery for my delta 2 unit to run an air conditioner in my cabin. There is enough power to run my window unit during the day when it’s 100 degrees outside. No problems with the setup.

I live off grid and I have found that the extra battery helps extend my power.

I purchased this addon battery due to the Delta 2 only having 1024 watt hours, I wanted to double my watt hour amount and I was fine with the amount of ports and outlets on my main Delta 2 1024 wh unit as is.Here's the catch. The addon battery has no inverter for outlets which I expected, but it also has no wall outlet charger port to charge the unit separately. You have to daisy chain the addon battery to the main delta 2 unit and tether them with the side port used by the alternator charger. It's not ideal, but it's what you'll get for buying an entire new delta 2 or delta 2 max. The firmware is designed to pass battery charge amount between the 2 units when connected together and not using a wall outlet ac charger input. This is information I wish I had knew before purchasing. It's a solid unit for the most part, but just know the limitations of what you're buying.

Great product,and fast shipping.

Was the wrong 1. I am sure the unit worked my unit works good. Just wasn't a matched to my unit.

Todo fue perfecto

Very nice generator. I bought it over a year ago and had to use it about 3bmonths ago when we lost our power for about 8 hours. I charged it up with the wall outlet when I bought it. Put it in storage, and a little over a year later I needed to use it, and it still had a full charge. I bought the extra spare power cell for it about 5 months ago. I have not had an opertunity to use the supplied solar panel for it yet, so at this time I can't comment on that. I like it a lot, and would recommend it.