What does the DELTA 2 Max offer on paper?
EcoFlow rates the DELTA 2 Max at 2048 Wh of LFP battery, with 2400 W of continuous AC output and a surge rating of 4800 W. That places it among models with 2000 W or more of continuous AC output, and it can add batteries.
EcoFlow backs it with a warranty of 5 years.
| Power and capacity | |
|---|---|
| Battery capacity | 2048 Wh |
| Battery chemistry | LFP |
| Continuous AC output | 2400 W |
| Surge output | 4800 W |
| UPS switchover (max) | 20 ms |
| Pass-through charging | Yes |
| Expandable | Yes |
| Solar charging | |
| Max solar input | 1000 W |
| Lowest solar voltage | 11 V |
| Max solar voltage | 60 V |
| Max solar current | 15 A |
| Solar connector | xt60i |
| Solar input ports | 2 ports |
| Ports | |
| AC outlets | 6 |
| USB-A ports | 4 |
| USB-C ports | 2 |
| 12 V car socket | 1 |
| Size and moving it | |
| Length | 19.6 in |
| Width | 9.5 in |
| Height | 12 in |
| Weight | 50.7 lb |
| Screen, app and light | |
| App over Bluetooth and Wi-Fi | Yes |
| 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 2 Max | $1,029.00 at EcoFlow | 1.99 Wh/$ | #2 of 4 |
 EcoFlow DELTA 3 Max Plus | $1,149.00 at EcoFlow | 1.78 Wh/$ | #3 of 4 |
 EcoFlow DELTA 3 Max (Detachable Wheels) | $1,299.00 at EcoFlow | 1.58 Wh/$ | #4 of 4 |
 BLUETTI Elite 200 V2 | $899.00 at BLUETTI | 2.31 Wh/$ | #1 of 4 |
How big and heavy is it to move?
At 50.7 lb, the DELTA 2 Max falls in the heavy (over 50 lb) class. It measures 19.6 in long, 9.5 in wide and 12 in tall.
If you expect to lift a heavy power station regularly, plan on using a cart, a dolly or a second person.
Which ports can you plug into?
There are 6 AC outlets on the DELTA 2 Max. Altogether, it also provides 4 USB-A ports, 2 USB-C ports and 1 car port.
On the DELTA 2 Max, app control over Wi-Fi and Bluetooth is a yes. Before you buy, count the plugs you expect to use at the same time.
How fast does it refill from solar?
At its max solar input of 1000 W, the fastest full solar refill works out to 2.0 hours. EcoFlow lists that input across 2 ports with xt60i connectors.
Per input, the limits are 11 V to 60 V and up to 15 A. Match your panel voltage to the input range before you wire panels in series.
What happens when the power goes out?
EcoFlow states a UPS switchover of 20 ms at most. That places the DELTA 2 Max in the 20 ms or less group for UPS switchover.
EcoFlow lists pass-through charging as yes. Check how long your own sensitive equipment can tolerate an interruption in power.
Can it charge in the cold?
No, the DELTA 2 Max does not charge below 0 °C. EcoFlow gives a charging range of 0 °C to 45 °C.
Discharging is rated from -10 °C up to 45 °C. Plan to charge it somewhere that stays at or above 0 °C.
What do you get for the money?
At EcoFlow, the DELTA 2 Max costs $1,029.00, which works out to 1.99 Wh/$. That value ranks #2 of 4 among the products compared in this article.
Watt-hours per dollar is a fair way to compare units of a similar size, but ports, weight and charging speed still matter.
Who should buy the DELTA 2 Max?
Its specs line up with a buyer who wants 2048 Wh, up to 1000 W of solar input and a unit that can add batteries. The limits to weigh are its 50.7 lb weight and that it does not charge below 0 °C.
If you need something you can comfortably carry with one hand, consider a smaller capacity class instead.
Is the BLUETTI Elite 200 V2 a better deal?
On value, yes: the Elite 200 V2 ranks #1 of 4 at 2.31 Wh/$, while the DELTA 2 Max ranks #2 of 4 at 1.99 Wh/$. It sells for $899.00 at BLUETTI and holds 2073.6 Wh of battery capacity. BLUETTI rates it at 2600 W of steady output, with power lifting up to 3900 W.
Its UPS switchover is 15 ms at most, and it runs loads down to -20 °C. The trade-offs: it cannot add batteries, it weighs 53.35 lb, and for a built-in light the answer is none. It also has 4 AC outlets and 2 USB-A ports, against 6 AC outlets and 4 USB-A ports on the DELTA 2 Max.
Why pick the DELTA 3 Max Plus instead?
The DELTA 3 Max Plus has more output than the DELTA 2 Max: 3000 W steady against 2400 W, and 6000 W of surge against 4800 W. EcoFlow says a wall charge reaches 80 percent in 64 minutes. At 48.7 lb, it is lighter than the DELTA 2 Max at 50.7 lb.
Its price at EcoFlow is $1,149.00, for 1.78 Wh/$ and a rank of #3 of 4. EcoFlow gives it a warranty of 5 years, that is 3 years as standard, plus 2 more when you register it in the EcoFlow app.
What sets the DELTA 3 Max (Detachable Wheels) apart?
The DELTA 3 Max (Detachable Wheels) is the lightest of this group's EcoFlow models at 44.8 lb, against 50.7 lb for the DELTA 2 Max and 48.7 lb for the DELTA 3 Max Plus. Solar input is lower, at up to 500 W against 1000 W on the DELTA 2 Max, the DELTA 3 Max Plus and the Elite 200 V2.
Its best-case full solar refill, calculated from that maximum input, is 4.1 hours. At $1,299.00 from EcoFlow, it works out to 1.58 Wh/$, which ranks #4 of 4.