The Jackery is the pick for best overall, and the numbers support it across
every category that matters. It sustained 2,401 W, second only to the DJI
Power, delivered 1,780 Wh of usable energy, and retained 89% of its charge
after 15 idle hours — the best standby result here by four points. It also
converts charging time into usable energy faster than anything else: 80 minutes
from empty yields 22.3 Wh per minute of charging, against 17.8 for the next
best. At 45.4 dB it is the second quietest unit, and it gives the longest
estimated appliance runtimes in the comparison, around 29.2 hours for a
full-size refrigerator. It also costs $1,499, $699 more than anything else on
this list.
For most buyers the $699 EcoFlow is the smarter purchase and the pick for best
budget option. It held 1,801 W against an 1,800 W rating, returned 900 Wh from
a 1,024 Wh pack for 87.9% efficiency, recharged in 57 minutes against an
80-minute claim, kept 82% after 15 idle hours, and at 37.8 dB is the quietest
unit here by more than seven decibels. If stored energy per dollar is the
priority instead, the $599 Dabbsson is unmatched: 1,880 Wh delivered, more than
any other unit and 100 Wh more than the Jackery for $900 less, at 91.8% of its
rating. It asks for patience and muscle in return — 114.6 minutes to recharge,
drawing 2,380 Wh from the wall to store 1,880, and very close to 40 lb to
carry. The Jackery's equivalent figures are 2,220 Wh in for 1,780 Wh out.
Three cautions before buying. The GRECELL is the only station that kickstarted
the 33-gallon air compressor while three halogen lights were already running,
at nearly 2,600 W, and that is a real achievement — but it was also the only
unit whose computer went dark in the UPS test, it puts out roughly 110 V rather
than 120, it will not discharge below 12% so only 830 Wh of its 1,126 Wh rating
is reachable, its 100 W USB-C port managed 53 W and its 18 W port managed 1 W,
and at 44.86 lb it is the heaviest here. The OUPES fell from 100% to 55% in 15
hours of sitting idle, by far the worst standby drain, and its fan is the
loudest at 67.4 dB. And two units read differently once measured: the BLUETTI
could not start the air compressor even with no other load connected, and the
DJI Power, for all that it produced the most continuous power in the
comparison, is advertised at 26 dB and ran at 55.7.
If surge capability is what you need — a well pump, a compressor, anything with
a motor — the ordering changes. Six of the nine had enough surge to kickstart
the compressor with two halogen lights already drawing current, among them the
$499 Segway, which is the cheapest way into that group, and the Dabbsson, which
did it at 119.5 V and 2,554 W without the voltage sag the Segway showed. Only
the GRECELL managed three lights, and only the BLUETTI failed to start the
compressor on its own.