Which of these power stations is the best value?
The BLUETTI AC180 Solar is the best value of this group, ranked #1 of 6 at 2.31 Wh/$ for $499.00 at BLUETTI. ResMed lists a typical power draw of 56.1 W for the AirSense 11 and a peak of 73.2 W.
ResMed also lists a 65 W AC adaptor as its power supply, with 100-240 V AC input and 24 V output. Each run time in this article is simple math: the battery size divided by the draw, with no losses counted.
| Product | Best current price | Watt-hours per dollar | Value rank |
|---|---|---|---|
 BLUETTI AC180 Solar | $499.00 at BLUETTI | 2.31 Wh/$ | #1 of 6 |
 BLUETTI Elite 200 V2 | $899.00 at BLUETTI | 2.31 Wh/$ | #2 of 6 |
 EcoFlow DELTA 3 Ultra Series | $1,369.00 at EcoFlow | 2.24 Wh/$ | #3 of 6 |
 BLUETTI Elite 100 V2 | $499.00 at BLUETTI | 2.05 Wh/$ | #4 of 6 |
 EcoFlow DELTA 2 Max | $1,029.00 at EcoFlow | 1.99 Wh/$ | #5 of 6 |
 EcoFlow TRAIL 300 DC | $159.00 at EcoFlow | 1.81 Wh/$ | #6 of 6 |
What does the run-time math show for the AC180 Solar?
For the BLUETTI AC180 Solar, 1152 Wh divided by the 56.1 W typical draw of an AirSense 11 is 20.5 hours, before losses. Using the 73.2 W peak, the same math gives 15.7 hours. BLUETTI rates it for 1800 W of steady AC output and 2700 W of surge.
It weighs 36.16 lb, according to BLUETTI. BLUETTI lists a maximum UPS switchover time of 20 ms. For solar, BLUETTI lists a 500 W maximum input.
At that listed maximum, a full solar refill works out to as little as 2.3 hours, by simple math, before losses. BLUETTI lists a warranty of 5 years.
Strengths
- UPS switchover speed: 20 ms or less
Which pick matches the AC180 Solar on value?
The BLUETTI Elite 200 V2 ties the BLUETTI AC180 Solar on the rounded 2.31 Wh/$ figure, and it ranks #2 of 6. It costs $899.00 at BLUETTI, and for that price BLUETTI lists 2073.6 Wh of storage. Divide that by the 56.1 W typical draw of an AirSense 11 and you get 37.0 hours before losses.
At the 73.2 W peak, the math drops to 28.3 hours. BLUETTI lists a silent wall charge time of 3 hours and a turbo time of 1.4 hours. Pass-through charging is listed as yes, and BLUETTI gives a maximum UPS switchover of 15 ms.
It has 4 AC outlets and 1 car port. At 53.35 lb, it is in the heavy (over 50 lb) class, and it also cannot add batteries.
How much battery does the DELTA 3 Ultra Series hold?
The EcoFlow DELTA 3 Ultra Series holds 3072 Wh, and that divided by the 56.1 W typical draw of an AirSense 11 is 54.8 hours, before losses. At the 73.2 W peak, the same math gives 42.0 hours. EcoFlow lists pass-through as yes and a UPS switchover of 10 ms.
It sells for $1,369.00 at EcoFlow, a price that gives 2.24 Wh/$ and a value rank of #3 of 6 in this group. EcoFlow rates it for 3600 W of steady AC output. It is listed at 72.1 lb and 24.6 in tall, according to EcoFlow.
That weight places it in the heavy (over 50 lb) class. Its warranty runs 5 years, that is 3 years as standard, plus 2 more when you register it in the EcoFlow app. Solar input is listed at an 800 W maximum, and the unit has solar inputs on 2 ports.
Strengths
- Large-load output: 2000 W or more of continuous AC output
- UPS switchover speed: 20 ms or less
Gaps
- Weight class: heavy (over 50 lb)
- Charging in freezing weather: does not charge below 0 °C
How heavy is the Elite 100 V2?
The BLUETTI Elite 100 V2 weighs 25.3 lb, which puts it in the easy to carry (under 30 lb) class. BLUETTI lists it at 12.6 in long, 8.5 in wide and 9.8 in tall. Its 1024 Wh battery divided by the typical draw of an AirSense 11 comes to 18.3 hours before losses, and to 14.0 hours at the peak draw.
The price is $499.00 at BLUETTI, the same as the BLUETTI AC180 Solar at $499.00 at BLUETTI. It comes in at 2.05 Wh/$ and ranks #4 of 6. BLUETTI lists a wall charge to 80 percent in 45 minutes.
It has 4 AC outlets and pass-through charging is marked yes, but it cannot add batteries. BLUETTI gives a maximum UPS switchover of 10 ms for this model.
Strengths
- Weight class: easy to carry (under 30 lb)
- UPS switchover speed: 20 ms or less
Gaps
- Charging in freezing weather: does not charge below 0 °C
- Battery expansion: cannot add batteries
Can the DELTA 2 Max take extra batteries?
Yes, the EcoFlow DELTA 2 Max can add batteries. EcoFlow lists 2048 Wh of storage. Divided by an AirSense 11 drawing 56.1 W, that is 36.5 hours before losses, or 28.0 hours at 73.2 W.
It costs $1,029.00 at EcoFlow, which works out to 1.99 Wh/$ and a rank of #5 of 6. There are 6 AC outlets, 4 USB-A ports, 2 USB-C ports and 1 car port. EcoFlow lists pass-through as yes and a maximum UPS switchover of 20 ms.
With a listed weight of 50.7 lb, it sits in the heavy (over 50 lb) class.
Strengths
- Large-load output: 2000 W or more of continuous AC output
- UPS switchover speed: 20 ms or less
- Battery expansion: can add batteries
Gaps
- Weight class: heavy (over 50 lb)
- Charging in freezing weather: does not charge below 0 °C
What does $159.00 buy in the TRAIL 300 DC?
For $159.00 at EcoFlow, the EcoFlow TRAIL 300 DC gives you 288 Wh in a unit that weighs 5.7 lb. It ranks #6 of 6 on value, at 1.81 Wh/$. EcoFlow lists a 110 W solar maximum.
At that listed maximum, a full refill from panels works out to as little as 2.6 hours, by simple math, before losses. It is easy to carry (under 30 lb), but it does not charge below 0 °C.
Strengths
- Weight class: easy to carry (under 30 lb)
Gaps
- Charging in freezing weather: does not charge below 0 °C
How should you choose among these batteries?
If value comes first, the BLUETTI AC180 Solar ranks #1 of 6, while the EcoFlow TRAIL 300 DC ranks #6 of 6 at $159.00 at EcoFlow. Start with the watts printed on your own machine's label or listed in its manual, not a figure taken from a different model. Then count the nights.
Leave room for losses, since the simple math above counts none. If you plan to carry the battery to a tent or cabin, weight may matter more than extra hours. The BLUETTI Elite 100 V2 at 25.3 lb and the EcoFlow TRAIL 300 DC at 5.7 lb are both easy to carry (under 30 lb).
ResMed lists an operating range of 5 °C to 35 °C for the AirSense 11. Compare that range with the room or tent where you will be sleeping. ResMed says a DC/DC converter is offered as an accessory for the AirSense 11.