EcoFlow
RIVER 2 Max 500
499 Wh battery, 500 W output. Small: CPAP, laptops, lights and phones. A 40 W CPAP runs about 11 hours.
Battery
499 Wh
fridge about 7 hours
Output
500 W
1,000 W surge
Solar in
220 W
full in about 3 hours
Weight
13.2 lb
one hand
Where to buyPrices checked Oct 27, 2026
EcoFlow store
Ships from the maker, usual warranty
Amazon
This model's Amazon page; price shown on Amazon
We may earn a commission if you buy through these links. It never changes a verdict.
What can it run, and for how long?
Tap what you would plug in. Hours assume a full battery and 15% lost to conversion.
Fridge + LED lights + Phone
5.5 hours
on a full charge, drawing 80 WBattery over time80 W draw
Full5.5 hours
Together these draw 80 W. This station puts out 500 W. It will shut off. Remove the biggest item or run them one at a time.
Specs in plain English
Tap any underlined term for a one-sentence explanation.
Wh
499 WhFrom the brand's page
Enough for a 60 W fridge for about 7 hours, or a CPAP for about 11 hours.Wh Watt-hours. Battery size. How much energy is stored. 1,000 Wh runs a 100W device for about 8.5 hours after losses.
W
500 WFrom the brand's page
Fridge, CPAP, laptops, lights.W Watts. Power right now. The station has a maximum it can put out; each appliance has a draw.
Surge
1,000 WFrom the brand's page
Short bursts for motors starting, like a fridge compressor or a pump.Surge A short burst of extra output the station can deliver for a second or two, for motors starting.
Voc
11 to 50 VFrom the brand's page
Your panels, wired up, must stay inside this range even on a cold morning. The checker does the math.Voc Open-circuit voltage. The highest voltage a panel makes, with nothing connected. Rises in cold.
Imp
13 AFrom the brand's page
Over this, the station simply caps what it takes. You lose watts, nothing breaks.Imp Current at maximum power. The working current when the panel is actually charging.
MPPT
220 WFrom the brand's page
From empty to full in about 3 hours of good sun at 70% of rating.MPPT Maximum power point tracker. The charge controller inside the station that finds the best voltage to pull from the panels.
Solar portplug
Solar inputFrom the brand's page
The plug on the station. Panels with a different plug need an adapter cable; we list it in the checker.LiFePO4
LiFePO4From the brand's page
Long-life chemistry, suited to daily solar use. Check the manual for the exact cycle rating.LiFePO4 Lithium iron phosphate. The battery chemistry in most current stations. Rated for thousands of full cycles; check the manual for the exact number.
Weightlb
13.2 lbFrom the brand's page
One-hand carry.Solar panels that work with it
Checked against the 11 to 50 V input range and the 13 A current cap, on a 20F morning. Change panels, count and temperature in the full checker.
Jackery
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1 panelWorks
2 panels, in parallelWorks
Jackery
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1 panelWorks
2 panels, in parallelWorks
EcoFlow
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1 panelWorks, with a catch
2 panels, in parallelWorks, with a catch
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1 panelWorks
2 panels, in parallelWorks
BLUETTI
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2 panels, in parallelWorks
BLUETTI
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1 panelWorks
2 panels, in parallelWorks
Anker SOLIX
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1 panelWorks
2 panels, in parallelWorks
Anker SOLIX
PS200 Bifacial
1 panelDon't connect
2 panels, in parallelDon't connect
Having a problem?
Short fixes from the manuals.
Sources
From the brand's pageEcoFlow RIVER 2 Max 500 product page
Shop listing, not yet confirmedPrice, from the EcoFlow store on Oct 27, 2026 (checked every morning)
Spotted an error? Email [email protected] with the manual page number.