What does the DELTA 3 Ultra Series offer on paper?
The EcoFlow DELTA 3 Ultra Series holds 3072 Wh and costs $1,369.00 new at EcoFlow. EcoFlow rates its AC output at 3600 W, with a surge of 7200 W. That puts it among units with 2000 W or more of continuous AC output.
The battery uses LFP chemistry. Steady output is the number to watch if you plan to run large tools or kitchen appliances.
| Power and capacity | |
|---|---|
| Battery capacity | 3072 Wh |
| Battery chemistry | LFP |
| Continuous AC output | 3600 W |
| Surge output | 7200 W |
| UPS switchover (max) | 10 ms |
| Pass-through charging | Yes |
| Solar charging | |
| Max solar input | 800 W |
| Lowest solar voltage | 11 V |
| Max solar voltage | 60 V |
| Max solar current | 18 A |
| Solar connector | xt60i |
| Solar input ports | 2 ports |
| Size and moving it | |
| Length | 15.6 in |
| Width | 12.9 in |
| Height | 24.6 in |
| Weight | 72.1 lb |
| Temperature and warranty | |
| Charging, lowest | 0 °C |
| Charging, highest | 45 °C |
| Use, lowest | -10 °C |
| Use, highest | 45 °C |
| Warranty | 5 years |
| Product | Best current price | Watt-hours per dollar | Value rank |
|---|---|---|---|
 EcoFlow DELTA 3 Ultra Series | $1,369.00 at EcoFlow | 2.24 Wh/$ | #2 of 3 |
 BLUETTI Apex 300 Versatile | $1,599.00 at BLUETTI | 1.73 Wh/$ | #3 of 3 |
 BLUETTI Elite 200 V2 | $899.00 at BLUETTI | 2.31 Wh/$ | #1 of 3 |
How big and heavy is it?
This is a heavy unit: EcoFlow lists it at 72.1 lb. It falls in the heavy (over 50 lb) weight class.
The case is 15.6 in long, 12.9 in wide and 24.6 in tall.
How much solar input does it take?
EcoFlow rates solar input up to 800 W, and the unit has 2 ports for solar input. The solar plug type is xt60i, and the lowest solar voltage it tracks is 11 V.
At the full 800 W, the calculated best-case solar refill is 3.8 hours. Clouds, short winter days and panel angle all cut what panels deliver, so real refill times run longer than the best case.
Does it support pass-through charging, and how fast is switchover?
EcoFlow states the DELTA 3 Ultra Series supports pass-through charging (yes), and rates switchover at 10 ms at most. That places it in the 20 ms or less group for UPS switchover speed.
If a desktop computer or router needs to stay on when the grid drops, switchover speed is the spec to compare.
Is the price fair for what you get?
At $1,369.00, the DELTA 3 Ultra Series works out to 2.24 Wh/$, which ranks it #2 of 3 on value in this article. The Elite 200 V2 leads at 2.31 Wh/$, ahead of the EcoFlow at 2.24 Wh/$.
Last comes the Apex 300 Versatile at 1.73 Wh/$. A value figure counts stored energy only, so compare it alongside continuous output, solar input and overall weight.
Where is it strong, and where does it fall short?
The limits that stand out are the 72.1 lb weight and no charging below 0 °C. On the plus side, EcoFlow rates it to supply power from -10 °C up to 45 °C. The maximum charging temperature is 45 °C.
If you expect freezing weather, the 0 °C charging limit is the spec to check. Cover runs 5 years, that is 3 years as standard, plus 2 more when you register it in the EcoFlow app.
Who should buy the DELTA 3 Ultra Series?
It fits a buyer who wants 3072 Wh and 3600 W of output in one box for $1,369.00, and who can live with 72.1 lb and no charging below 0 °C. Buyers who plan to move a power station often should weigh portability as closely as capacity.
How does the Apex 300 Versatile differ?
The BLUETTI Apex 300 Versatile costs $1,599.00 and holds 2764.8 Wh. So it costs more than the DELTA 3 Ultra Series at $1,369.00 and stores less than its 3072 Wh. BLUETTI rates its solar input at 2400 W per input, with 2 ports, while EcoFlow lists 800 W for the DELTA.
BLUETTI also lists 80 percent from the wall in 45 minutes. It also carries a power lifting rating of 7680 W. High solar input only pays off when you own enough panels, and enough roof or ground area, to supply it.
Is the Elite 200 V2 the better value?
On value, yes: the BLUETTI Elite 200 V2 ranks #1 of 3 at 2.31 Wh/$ and costs $899.00. It holds 2073.6 Wh and puts out 2600 W, while the DELTA 3 Ultra Series offers 3072 Wh and 3600 W. At 53.35 lb it is lighter than the EcoFlow at 72.1 lb, yet it still counts as heavy (over 50 lb).
It has 4 AC outlets, 2 USB-C ports and 2 USB-A ports. BLUETTI rates a wall charge at 1.4 hours in turbo mode. Solar input tops out at 1000 W, and BLUETTI lists a solar charge time of 2.4 hours from 1000W panels.
One important limitation is that it cannot add batteries.