EcoFlow DELTA Pro 3 vs OUPES Guardian 6000 V2

EcoFlow DELTA Pro 3 portable power station

OUPES Guardian 6000 V2 portable power station

Pick this if

EcoFlow DELTA Pro 3

UPS switchover: 10 ms vs 20 ms
Max expandable capacity: 48,000 Wh vs 41,400 Wh

Buyers who want one system to grow from camping into home backup.

Pick this if

OUPES Guardian 6000 V2

Capacity: 4,608 Wh vs 4,096 Wh
Continuous AC output: 6,000 W vs 4,000 W
Weight: 111.8 lb vs 113.5 lb
List price: $2,699 vs $2,799

Buyers who need maximum capacity for the least money and accept the trade-offs.

Spec by spec

A green arrow marks the better figure on each row. Rows where only one unit publishes a number are shown without a winner rather than guessed.

Metric	DELTA Pro 3	Guardian 6000 V2	What it means
Capacity	4,096 Wh	4,608 Wh	How much energy the unit stores. Sets how long everything else can run.
Continuous AC output	4,000 W	6,000 W	The largest load the inverter will run continuously, not counting surge.
Weight lower is better	113.5 lb	111.8 lb	The spec buyers most often regret ignoring.
List price lower is better	$2,799	$2,699	Vendor list price at the time of collection; street prices move.
Cost per watt-hour lower is better	$0.68	$0.59	Price divided by capacity. The fairest single value metric.
Watt-hours per pound	36.1 Wh/lb	41.2 Wh/lb	Capacity you get per pound carried.
Max solar input	2,600 W	3,600 W	Caps how large an array is useful, and therefore off-grid recharge speed.
Rated cycles	4,000 cycles	4,000 cycles	Vendor claim for charge cycles before capacity degrades to 80%.
UPS switchover lower is better	10 ms	20 ms	How long the unit takes to switch to battery. Under 20 ms keeps a desktop alive.
Max expandable capacity	48,000 Wh	41,400 Wh	How far the system can grow with add-on batteries.
Warranty	60 months	72 months	Stated warranty length from the vendor listing.

How each one ranks overall

EcoFlow DELTA Pro 3

#67 of 104 for Best value (cost per watt-hour) ($0.68)
#56 of 103 for Most portable (Wh per pound) (36.1 Wh/lb)
#90 of 106 for Most inverter headroom (98 W/100Wh)
#8 of 83 for Highest solar input (2.6 kW)
#3 of 36 for Most expandable (48 kWh)
#4 of 96 for Longest service life (16384 kWh)
#80 of 103 for Most output per dollar (1.43 W/$)
#3 of 106 for Best for home backup (85/100)
#23 of 105 for Longest warranty (60 mo)
#16 of 29 for Quietest under load (30 dB)

OUPES Guardian 6000 V2

#57 of 104 for Best value (cost per watt-hour) ($0.59)
#29 of 103 for Most portable (Wh per pound) (41.2 Wh/lb)
#44 of 106 for Most inverter headroom (130 W/100Wh)
#3 of 83 for Highest solar input (3.6 kW)
#4 of 36 for Most expandable (41.40 kWh)
#3 of 96 for Longest service life (18432 kWh)
#56 of 103 for Most output per dollar (2.22 W/$)
#2 of 106 for Best for home backup (86/100)
#2 of 105 for Longest warranty (72 mo)

The brands behind them

EcoFlow

The tech-forward buyer who reads the spec sheet and wants room to grow

Best for: Buyers who want one system to grow from camping into home backup.

Not for: Buyers who want the lowest cost per watt-hour and will never use an app.

Full EcoFlow profile →

OUPES

The price-first buyer comparing watt-hours on a marketplace listing

Best for: Buyers who need maximum capacity for the least money and accept the trade-offs.

Not for: Buyers who value support, app quality or long-term resale.

Full OUPES profile →

Where these numbers come from. Every figure on this page is taken from EcoFlow’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: us.ecoflow.com/products/delta-pro-3-portable-power-station.

Vendor wording for each figure (8)

capacityWh: “Rated Capacity => 4096Wh”
acOutputW: “AC Output => 120/240V~16.7A 60Hz, 4000W total”
weight: “Net Weight => 51.5kg (113.54 lb)”
solarInputW: “2600W total, 2 ports”
cycleLife: “Cycle Life => 4000 cycles to 80% capacity”
upsSwitchoverMs: “Backup UPS 10ms”
maxExpandableWh: “Expandable Capacity => 4–48 kWh”
warrantyMonths: “Warranty => 5-year warranty”

Where these numbers come from. Every figure on this page is taken from OUPES’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: oupes.com/products/oupes-guardian-6000-v2-portable-power-station.

Vendor wording for each figure (8)